![Subhajit Sarkar](https://profiles-cardiff.imgix.net/attachments/3806?w=200&h=200&auto=format&crop=faces&fit=crop&q=90")
Dr Subhajit Sarkar
- Ar gael fel goruchwyliwr ôl-raddedig
Timau a rolau for Subhajit Sarkar
Darlithydd
Grŵp Seryddiaeth
Grŵp Offeryniaeth Seryddiaeth
Canolfan Caerdydd ar gyfer Ymchwil a Thechnoleg Astroffiseg
Trosolwyg
Rwy'n ddarlithydd prifysgol ac astroffisegydd sy'n arbenigo mewn astudio planedau allsolar, gyda ffocws penodol ar atmosfferau is-Neifion tymherus a chewri nwy. Mae fy ymchwil yn cyfuno arsylwadau a theori i ymchwilio i'r prosesau ffisegol a chemegol sy'n siapio y bydoedd hyn, gan ddefnyddio nodweddu atmosfferig i fynd i'r afael â chwestiynau sylfaenol am ffurfio planedau, esblygiad planedau, ac amrywiaeth systemau exoplanetary.
Un o themâu canolog fy ymchwil yw nodweddu atmosfferau exoplanet tymherus gan ddefnyddio Telesgop Gofod James Webb (JWST). Trwy gydweithredu â'r Sefydliad Seryddiaeth, Prifysgol Caergrawnt, rwy'n defnyddio'r arsylwadau hyn i ymchwilio i darddiad, cyfansoddiad ac esblygiad planedau sy'n meddiannu rhanbarth o'r gofod paramedr nad oedd yn hygyrch o'r blaen. Rwyf hefyd yn arwain y Twinkle Cool Gas Giant Survey, astudiaeth gymharol ar raddfa fawr o atmosfferau exoplanet enfawr tymherus.
Ochr yn ochr â'r rhaglenni arsylwadol hyn, rwy'n cyfrannu at ddatblygu arsyllfeydd exoplanet yn y dyfodol a theithiau nodweddu atmosfferig, gan gynnwys cenhadaeth Ariel ESA, gan helpu i baratoi'r genhedlaeth nesaf o gyfleusterau ar gyfer gwyddoniaeth exoplanet cymharol.
Mae fy ymchwil hefyd yn ymestyn i astrobioleg, yn enwedig y potensial ar gyfer biosfferau mewn is-Neifion tymherus a chewri nwy. Mae gen i ddiddordeb hefyd mewn sut y gellir defnyddio arsylwadau atmosfferig i gyfyngu ar amlder bydoedd sy'n dwyn bywyd—y term fL yn Hafaliad Drake—ac i brofi rhagdybiaethau cystadleuol ar gyfer tarddiad bywyd ar raddfeydd planedol.
Cyhoeddiad
2026
- Binet, M. et al., 2026. A homogeneous survey of JWST-MIRI transmission spectra of 10 exoplanets. The Astrophysical Journal Letters 1008 (2) L42. (10.3847/2041-8213/ae8c2d)
- Holmberg, M. et al., 2026. The mid-infrared transmission spectrum of the temperate sub-Neptune TOI-270 d. The Astrophysical Journal Letters 1005 (2) L53. (10.3847/2041-8213/ae6640)
- Sarkar, S. et al. 2026. Transmission spectrum of the benchmark temperate exo-Neptune TOI-1231 b. The Astrophysical Journal Letters 1005 (2) L52. (10.3847/2041-8213/ae6507)
2025
- Rigby, F. E. et al., 2025. A JWST transmission spectrum of the temperate sub-neptune TOI-732 c. The Astrophysical Journal Letters 995 (2) L70. (10.3847/2041-8213/ae247d)
- Madhusudhan, N. et al., 2025. New constraints on DMS and DMDS in the atmosphere of K2-18 b from JWST MIRI. The Astrophysical Journal Letters 983 (2) L40. (10.3847/2041-8213/adc1c8)
2024
- Bernard, L. et al., 2024. Assembly, integration, and laboratory testing of the EXCITE spectrograph (Erratum). Presented at: SPIE Astronomical Telescopes + Instrumentation Yokohama, Japan 18-20 June 2024. Proceedings Ground-based and Airborne Instrumentation for Astronomy X. Vol. 13096.SPIE. , pp.501. (10.1117/12.3056735)
- Romualdez, L. J. et al., 2024. The Exoplanet Climate Infrared Telescope (EXCITE): gondola pointing and stabilization qualification. Presented at: SPIE Astronomical Telescopes + Instrumentation Yokohama, Japan 16-22 June 2024. Published in: Marshall, H. K. , Spyromilio, J. and Usuda, T. eds. Proceedings of SPIE, Ground-based and Airborne Telescopes X. Vol. 13094., pp.130944Y. (10.1117/12.3018442)
- Kleyheeg, A. et al., 2024. Integration and testing of a cryogenic receiver for the Exoplanet Climate Infrared Telescope (EXCITE). Presented at: SPIE Astronomical Telescopes + Instrumentation, 2024 Yokohama, Japan 16-21 June 2024. Proceedings: Ground-based and Airborne Instrumentation for Astronomy X. SPIE. (10.1117/12.3020522)
- Sarkar, S. et al. 2024. Exoplanet transit spectroscopy with JWST NIRSpec: Diagnostics and homogeneous case study of WASP-39 b. Monthly Notices of the Royal Astronomical Society 531 (2), pp.2731-2756. (10.1093/mnras/stae1230)
- Booth, L. et al. 2024. Cool gaseous exoplanets: surveying the new frontier with twinkle. Monthly Notices of the Royal Astronomical Society 530 (2), pp.2166-2180. (10.1093/mnras/stae461)
2023
- Madhusudhan, N. et al., 2023. Carbon-bearing molecules in a possible Hycean atmosphere. Astrophysical Journal Letters 956 (1) L13. (10.3847/2041-8213/acf577)
- Edwards, B. et al., 2023. Characterizing a world within the hot-neptune desert: Transit observations of LTT 9779 b with the Hubble space telescope/WFC3. Astronomical Journal 166 (4) 158. (10.3847/1538-3881/acea77)
- Seidel, J. V. , Nielsen, L. D. and Sarkar, S. 2023. JWST opens a window on exoplanet skies. Nature (10.1038/d41586-023-00394-6)
- Nikolaou, N. et al., 2023. Lessons learned from the 1st Ariel Machine Learning Challenge: Correcting transiting exoplanet light curves for stellar spots. RAS Techniques and Instruments 2 (1), pp.695-709. (10.1093/rasti/rzad050)
2022
- Mugnai, L. V. et al. 2022. ExoRad2: Generic point source radiometric model. Astrophysics Source Code Library
- Bernard, L. et al., 2022. Design and testing of a low-resolution NIR spectrograph for the EXoplanet Climate Infrared TElescope. Presented at: SPIE Astronomical Telescopes + Instrumentation Montréal, Québec, Canada 17-22 July 2022. Vol. 12184.Society of Photo-optical Instrumentation Engineers. (10.1117/12.2629717)
- Nagler, P. C. et al., 2022. The EXoplanet Climate Infrared TElescope (EXCITE). Presented at: SPIE Astronomical Telescopes + Instrumentation, 2022 Montréal, Québec, Canada 17-22 July 2022. Vol. 12184.Society of Photo-optical Instrumentation Engineers. (10.1117/12.2629373)
- Rehm, T. et al., 2022. The design and development status of the cryogenic receiver for the EXoplanet Climate Infrared TELescope (EXCITE). Presented at: SPIE Astronomical Telescopes + Instrumentation, 2022 Montréal, Québec, Canada 17-22 July 2022. Vol. 12184.Society of Photo-optical Instrumentation Engineers. (10.1117/12.2629588)
- Bowles, N. E. et al., 2022. Ground calibration of the Ariel space telescope: optical ground support equipment design and description. Presented at: SPIE Astronomical Telescopes + Instrumentation, 2022 Montreal, Canada 17-23 July 2022. Proceedings Volume 12180, Space Telescopes and Instrumentation 2022: Optical, Infrared, and Millimeter Wave. Vol. 12180.SPIE. (10.1117/12.2627049)
- Stotesbury, I. et al., 2022. Twinkle: a small satellite spectroscopy mission for the next phase of exoplanet science. Presented at: SPIE Astronomical Telescopes + Instrumentation, 2022 Montréal, Québec, Canada 17-23 July 2022. Proceedings Volume 12180, Space Telescopes and Instrumentation 2022: Optical, Infrared, and Millimeter Wave. SPIE. (10.1117/12.2641373)
- Danielski, C. et al., 2022. The homogeneous characterisation of Ariel host stars. Experimental Astronomy 53 , pp.473-510. (10.1007/s10686-021-09765-1)
- Morello, G. , Danielski, C. and Sarkar, S. 2022. The Ariel 0.6 - 7.8 μm stellar limb-darkening coefficients. Experimental Astronomy 53 , pp.533-545. (10.1007/s10686-021-09740-w)
- Pearson, C. et al., 2022. The Ariel ground segment and instrument operations science data centre. Experimental Astronomy 53 , pp.773-806. (10.1007/s10686-020-09691-8)
- Sarkar, S. 2022. The DRAKE mission: finding the frequency of life in the Cosmos. Monthly Notices of the Royal Astronomical Society (10.1093/mnras/stac175)
2021
- Sarkar, S. and Madhusudhan, N. 2021. JexoSim 2.0: End-to-end JWST simulator for exoplanet spectroscopy - Implementation and case studies. Monthly Notices of the Royal Astronomical Society 508 (1), pp.433-452. (10.1093/mnras/stab2472)
- Sarkar, S. et al. 2021. ExoSim: the exoplanet observation simulator. Experimental Astronomy 51 , pp.287-317. (10.1007/s10686-020-09690-9)
- Mugnai, L. V. et al. 2021. Performance simulations tools for Space Telescopes applied to Ariel space mission. Presented at: European Planetary Science Congress 2021 Virtual 13–24 Sep 2021. EPSC Abstracts. Europlanet Society. , pp.EPSC2021-182. (10.5194/epsc2021-182)
2020
- Mugnai, L. V. et al., 2020. ArielRad: the Ariel radiometric model. Experimental Astronomy 50 , pp.303-328. (10.1007/s10686-020-09676-7)
- Tinetti, G. et al., 2020. Ariel: Atmospheric Remote-sensing Infrared Exoplanet Large-survey - enabling planetary science across light-years. Definition study report.
- Sarkar, S. et al. 2020. ExoSim: the exoplanet observation simulator. [Online].arXiv. Available at: https://arxiv.org/abs/2002.03739.
- Sarkar, S. , Madhusudhan, N. and Papageorgiou, A. 2020. JexoSim: A time domain simulator of exoplanet transit spectroscopy with JWST. Monthly Notices of the Royal Astronomical Society 491 (1), pp.378-397. (10.1093/mnras/stz2958)
2019
- Nagler, P. C. et al., 2019. Observing exoplanets in the near-infrared from a high altitude balloon platform. Journal of Astronomical Instrumentation 8 (3) 1950011. (10.1142/S2251171719500119)
- Edwards, B. et al., 2019. An updated study of potential targets for Ariel. Astronomical Journal 157 (6), pp.242. (10.3847/1538-3881/ab1cb9)
- Edwards, B. et al., 2019. Exoplanet spectroscopy and photometry with the Twinkle space telescope. Experimental Astronomy 47 (1-2), pp.29-63. (10.1007/s10686-018-9611-4)
2018
- Tinetti, G. et al., 2018. A chemical survey of exoplanets with ARIEL. Experimental Astronomy 46 (1), pp.135-209. (10.1007/s10686-018-9598-x)
- Zingales, T. et al., 2018. The ARIEL mission reference sample. Experimental Astronomy 46 (1), pp.67-100. (10.1007/s10686-018-9572-7)
- Pascale, E. et al. 2018. The ARIEL space mission. Presented at: SPIE Astronomical Telescopes + Instrumentation, 2018 Austin, TX, USA 10-15 June 2018. Published in: Lystrup, M. et al., Proceedings Volume 10698, Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave. Vol. 10698.Proceedings of SPIE Bellingham, Washington: Society of Photo-Optical Instrumentation Engineers (SPIE). (10.1117/12.2311838)
- Savini, G. et al., 2018. TWINKLE: a low earth orbit visible and infrared exoplanet spectroscopy observatory. Presented at: SPIE Astronomical Telescopes + Instrumentation 2016 Edinburgh, Scotland 26 June - 1 July 2016. Published in: MacEwen, H. A. et al., Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave. Vol. 9904.SPIE. , pp.99044M. (10.1117/12.2233691)
- Sarkar, S. et al. 2018. Stellar pulsation and granulation as noise sources in exoplanet transit spectroscopy in the ARIEL space mission. Monthly Notices of the Royal Astronomical Society 481 (3), pp.2871-2877. (10.1093/mnras/sty2453)
2017
- Sarkar, S. 2017. Exoplanet transit spectroscopy: development and application of a generic time domain simulator. PhD Thesis , Cardiff University.
2016
- Sarkar, S. , Papageorgiou, A. and Pascale, E. 2016. Exploring the potential of the ExoSim simulator for transit spectroscopy noise estimation. Presented at: SPIE Astronomical Telescopes + Instrumentation Edinburgh, UK 26 June - 1 July 2016. Published in: MacEwen, H. A. et al., Proceedings Volume 9904, Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave. Vol. 99043R.Society of Photo-Optical Instrumentation Engineers (SPIE). (10.1117/12.2234216)
- Tinetti, G. et al., 2016. The science of ARIEL (Atmospheric Remote-sensing Infrared Exoplanet Large-survey). Presented at: SPIE Astronomical Telescopes + Instrumentation Edinburgh, UK 26 June - 1 July 2016. Published in: MacEwen, H. A. et al., Proceedings Volume 9904, Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave. Vol. 9904.The International Society for Optical Engineering. , pp.99041X. (10.1117/12.2232370)
2015
- Pascale, E. et al. 2015. EChOSim: The Exoplanet Characterisation Observatory software simulator. Experimental Astronomy , pp.1-19. (10.1007/s10686-015-9471-0)
2006
- Dalmarco, G. et al., 2006. Evaluation of external cardiac massage performance during hypogravity simulation. Presented at: International Conference of the IEEE Engineering in Medicine and Biology Society New York, US 30 Aug-3 Sep 2006. 2006 International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE. , pp.2904. (10.1109/IEMBS.2006.259444)
2005
- Sarkar, S. et al. 2005. ISIS: The ISS Systematic Initial Survey - a new approach to guiding medical care on orbit. Aviation, Space, and Environmental Medicine 76 (3), pp.74.
2004
- Sarkar, S. 2004. Cardiopulmonary resuscitation in lunar and Martian gravity fields. Presented at: AsMA 75th Annual Scientific Meeting Anchorage, AK, USA 2-6 May 2004. , pp.-.
Arall
- Mugnai, L. V. et al. 2022. ExoRad2: Generic point source radiometric model. Astrophysics Source Code Library
Cynadleddau
- Bernard, L. et al., 2024. Assembly, integration, and laboratory testing of the EXCITE spectrograph (Erratum). Presented at: SPIE Astronomical Telescopes + Instrumentation Yokohama, Japan 18-20 June 2024. Proceedings Ground-based and Airborne Instrumentation for Astronomy X. Vol. 13096.SPIE. , pp.501. (10.1117/12.3056735)
- Romualdez, L. J. et al., 2024. The Exoplanet Climate Infrared Telescope (EXCITE): gondola pointing and stabilization qualification. Presented at: SPIE Astronomical Telescopes + Instrumentation Yokohama, Japan 16-22 June 2024. Published in: Marshall, H. K. , Spyromilio, J. and Usuda, T. eds. Proceedings of SPIE, Ground-based and Airborne Telescopes X. Vol. 13094., pp.130944Y. (10.1117/12.3018442)
- Kleyheeg, A. et al., 2024. Integration and testing of a cryogenic receiver for the Exoplanet Climate Infrared Telescope (EXCITE). Presented at: SPIE Astronomical Telescopes + Instrumentation, 2024 Yokohama, Japan 16-21 June 2024. Proceedings: Ground-based and Airborne Instrumentation for Astronomy X. SPIE. (10.1117/12.3020522)
- Bernard, L. et al., 2022. Design and testing of a low-resolution NIR spectrograph for the EXoplanet Climate Infrared TElescope. Presented at: SPIE Astronomical Telescopes + Instrumentation Montréal, Québec, Canada 17-22 July 2022. Vol. 12184.Society of Photo-optical Instrumentation Engineers. (10.1117/12.2629717)
- Nagler, P. C. et al., 2022. The EXoplanet Climate Infrared TElescope (EXCITE). Presented at: SPIE Astronomical Telescopes + Instrumentation, 2022 Montréal, Québec, Canada 17-22 July 2022. Vol. 12184.Society of Photo-optical Instrumentation Engineers. (10.1117/12.2629373)
- Rehm, T. et al., 2022. The design and development status of the cryogenic receiver for the EXoplanet Climate Infrared TELescope (EXCITE). Presented at: SPIE Astronomical Telescopes + Instrumentation, 2022 Montréal, Québec, Canada 17-22 July 2022. Vol. 12184.Society of Photo-optical Instrumentation Engineers. (10.1117/12.2629588)
- Bowles, N. E. et al., 2022. Ground calibration of the Ariel space telescope: optical ground support equipment design and description. Presented at: SPIE Astronomical Telescopes + Instrumentation, 2022 Montreal, Canada 17-23 July 2022. Proceedings Volume 12180, Space Telescopes and Instrumentation 2022: Optical, Infrared, and Millimeter Wave. Vol. 12180.SPIE. (10.1117/12.2627049)
- Stotesbury, I. et al., 2022. Twinkle: a small satellite spectroscopy mission for the next phase of exoplanet science. Presented at: SPIE Astronomical Telescopes + Instrumentation, 2022 Montréal, Québec, Canada 17-23 July 2022. Proceedings Volume 12180, Space Telescopes and Instrumentation 2022: Optical, Infrared, and Millimeter Wave. SPIE. (10.1117/12.2641373)
- Mugnai, L. V. et al. 2021. Performance simulations tools for Space Telescopes applied to Ariel space mission. Presented at: European Planetary Science Congress 2021 Virtual 13–24 Sep 2021. EPSC Abstracts. Europlanet Society. , pp.EPSC2021-182. (10.5194/epsc2021-182)
- Pascale, E. et al. 2018. The ARIEL space mission. Presented at: SPIE Astronomical Telescopes + Instrumentation, 2018 Austin, TX, USA 10-15 June 2018. Published in: Lystrup, M. et al., Proceedings Volume 10698, Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave. Vol. 10698.Proceedings of SPIE Bellingham, Washington: Society of Photo-Optical Instrumentation Engineers (SPIE). (10.1117/12.2311838)
- Savini, G. et al., 2018. TWINKLE: a low earth orbit visible and infrared exoplanet spectroscopy observatory. Presented at: SPIE Astronomical Telescopes + Instrumentation 2016 Edinburgh, Scotland 26 June - 1 July 2016. Published in: MacEwen, H. A. et al., Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave. Vol. 9904.SPIE. , pp.99044M. (10.1117/12.2233691)
- Sarkar, S. , Papageorgiou, A. and Pascale, E. 2016. Exploring the potential of the ExoSim simulator for transit spectroscopy noise estimation. Presented at: SPIE Astronomical Telescopes + Instrumentation Edinburgh, UK 26 June - 1 July 2016. Published in: MacEwen, H. A. et al., Proceedings Volume 9904, Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave. Vol. 99043R.Society of Photo-Optical Instrumentation Engineers (SPIE). (10.1117/12.2234216)
- Tinetti, G. et al., 2016. The science of ARIEL (Atmospheric Remote-sensing Infrared Exoplanet Large-survey). Presented at: SPIE Astronomical Telescopes + Instrumentation Edinburgh, UK 26 June - 1 July 2016. Published in: MacEwen, H. A. et al., Proceedings Volume 9904, Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave. Vol. 9904.The International Society for Optical Engineering. , pp.99041X. (10.1117/12.2232370)
- Dalmarco, G. et al., 2006. Evaluation of external cardiac massage performance during hypogravity simulation. Presented at: International Conference of the IEEE Engineering in Medicine and Biology Society New York, US 30 Aug-3 Sep 2006. 2006 International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE. , pp.2904. (10.1109/IEMBS.2006.259444)
- Sarkar, S. 2004. Cardiopulmonary resuscitation in lunar and Martian gravity fields. Presented at: AsMA 75th Annual Scientific Meeting Anchorage, AK, USA 2-6 May 2004. , pp.-.
Erthyglau
- Binet, M. et al., 2026. A homogeneous survey of JWST-MIRI transmission spectra of 10 exoplanets. The Astrophysical Journal Letters 1008 (2) L42. (10.3847/2041-8213/ae8c2d)
- Holmberg, M. et al., 2026. The mid-infrared transmission spectrum of the temperate sub-Neptune TOI-270 d. The Astrophysical Journal Letters 1005 (2) L53. (10.3847/2041-8213/ae6640)
- Sarkar, S. et al. 2026. Transmission spectrum of the benchmark temperate exo-Neptune TOI-1231 b. The Astrophysical Journal Letters 1005 (2) L52. (10.3847/2041-8213/ae6507)
- Rigby, F. E. et al., 2025. A JWST transmission spectrum of the temperate sub-neptune TOI-732 c. The Astrophysical Journal Letters 995 (2) L70. (10.3847/2041-8213/ae247d)
- Madhusudhan, N. et al., 2025. New constraints on DMS and DMDS in the atmosphere of K2-18 b from JWST MIRI. The Astrophysical Journal Letters 983 (2) L40. (10.3847/2041-8213/adc1c8)
- Sarkar, S. et al. 2024. Exoplanet transit spectroscopy with JWST NIRSpec: Diagnostics and homogeneous case study of WASP-39 b. Monthly Notices of the Royal Astronomical Society 531 (2), pp.2731-2756. (10.1093/mnras/stae1230)
- Booth, L. et al. 2024. Cool gaseous exoplanets: surveying the new frontier with twinkle. Monthly Notices of the Royal Astronomical Society 530 (2), pp.2166-2180. (10.1093/mnras/stae461)
- Madhusudhan, N. et al., 2023. Carbon-bearing molecules in a possible Hycean atmosphere. Astrophysical Journal Letters 956 (1) L13. (10.3847/2041-8213/acf577)
- Edwards, B. et al., 2023. Characterizing a world within the hot-neptune desert: Transit observations of LTT 9779 b with the Hubble space telescope/WFC3. Astronomical Journal 166 (4) 158. (10.3847/1538-3881/acea77)
- Seidel, J. V. , Nielsen, L. D. and Sarkar, S. 2023. JWST opens a window on exoplanet skies. Nature (10.1038/d41586-023-00394-6)
- Nikolaou, N. et al., 2023. Lessons learned from the 1st Ariel Machine Learning Challenge: Correcting transiting exoplanet light curves for stellar spots. RAS Techniques and Instruments 2 (1), pp.695-709. (10.1093/rasti/rzad050)
- Danielski, C. et al., 2022. The homogeneous characterisation of Ariel host stars. Experimental Astronomy 53 , pp.473-510. (10.1007/s10686-021-09765-1)
- Morello, G. , Danielski, C. and Sarkar, S. 2022. The Ariel 0.6 - 7.8 μm stellar limb-darkening coefficients. Experimental Astronomy 53 , pp.533-545. (10.1007/s10686-021-09740-w)
- Pearson, C. et al., 2022. The Ariel ground segment and instrument operations science data centre. Experimental Astronomy 53 , pp.773-806. (10.1007/s10686-020-09691-8)
- Sarkar, S. 2022. The DRAKE mission: finding the frequency of life in the Cosmos. Monthly Notices of the Royal Astronomical Society (10.1093/mnras/stac175)
- Sarkar, S. and Madhusudhan, N. 2021. JexoSim 2.0: End-to-end JWST simulator for exoplanet spectroscopy - Implementation and case studies. Monthly Notices of the Royal Astronomical Society 508 (1), pp.433-452. (10.1093/mnras/stab2472)
- Sarkar, S. et al. 2021. ExoSim: the exoplanet observation simulator. Experimental Astronomy 51 , pp.287-317. (10.1007/s10686-020-09690-9)
- Mugnai, L. V. et al., 2020. ArielRad: the Ariel radiometric model. Experimental Astronomy 50 , pp.303-328. (10.1007/s10686-020-09676-7)
- Sarkar, S. , Madhusudhan, N. and Papageorgiou, A. 2020. JexoSim: A time domain simulator of exoplanet transit spectroscopy with JWST. Monthly Notices of the Royal Astronomical Society 491 (1), pp.378-397. (10.1093/mnras/stz2958)
- Nagler, P. C. et al., 2019. Observing exoplanets in the near-infrared from a high altitude balloon platform. Journal of Astronomical Instrumentation 8 (3) 1950011. (10.1142/S2251171719500119)
- Edwards, B. et al., 2019. An updated study of potential targets for Ariel. Astronomical Journal 157 (6), pp.242. (10.3847/1538-3881/ab1cb9)
- Edwards, B. et al., 2019. Exoplanet spectroscopy and photometry with the Twinkle space telescope. Experimental Astronomy 47 (1-2), pp.29-63. (10.1007/s10686-018-9611-4)
- Tinetti, G. et al., 2018. A chemical survey of exoplanets with ARIEL. Experimental Astronomy 46 (1), pp.135-209. (10.1007/s10686-018-9598-x)
- Zingales, T. et al., 2018. The ARIEL mission reference sample. Experimental Astronomy 46 (1), pp.67-100. (10.1007/s10686-018-9572-7)
- Sarkar, S. et al. 2018. Stellar pulsation and granulation as noise sources in exoplanet transit spectroscopy in the ARIEL space mission. Monthly Notices of the Royal Astronomical Society 481 (3), pp.2871-2877. (10.1093/mnras/sty2453)
- Pascale, E. et al. 2015. EChOSim: The Exoplanet Characterisation Observatory software simulator. Experimental Astronomy , pp.1-19. (10.1007/s10686-015-9471-0)
- Sarkar, S. et al. 2005. ISIS: The ISS Systematic Initial Survey - a new approach to guiding medical care on orbit. Aviation, Space, and Environmental Medicine 76 (3), pp.74.
Gosodiad
- Sarkar, S. 2017. Exoplanet transit spectroscopy: development and application of a generic time domain simulator. PhD Thesis , Cardiff University.
Gwefannau
- Sarkar, S. et al. 2020. ExoSim: the exoplanet observation simulator. [Online].arXiv. Available at: https://arxiv.org/abs/2002.03739.
Monograffau
Ymchwil
Gweledigaeth Ymchwil
Nod fy ymchwil yw deall sut y gellir defnyddio atmosfferau planedol i ateb dau o'r cwestiynau mwyaf sylfaenol mewn seryddiaeth fodern: Pa mor gyffredin yw bywyd yn y Bydysawd? a Sut mae systemau planedol yn ffurfio ac yn esblygu? Trwy gyfuno arsylwadau o'r Telesgop Gofod James Webb (JWST) gyda datblygu teithiau gofod yn y dyfodol, modelu atmosfferig, a chasgliad ystadegol, rwy'n ceisio sefydlu atmosfferau exoplanet fel offeryn pwerus ar gyfer planedoleg gymharol ac astrobioleg.
1. Chwilio am fywyd y tu hwnt i gysawd yr haul
Nodweddiad atmosfferig bydoedd tymherus
Un o brif ffocws fy ymchwil yw nodweddu atmosfferig exoplanets tymherus a pharth habitable, yn enwedig is-Neifion a bydoedd Hycean arfaethedig. Trwy gydweithio â'r Sefydliad Seryddiaeth, Prifysgol Caergrawnt, rwy'n Gyd-Ymchwilydd ar ddwy brif raglen arsylwi JWST sy'n defnyddio sbectrosgopeg NIRISS, NIRSpec, a MIRI i astudio atmosfferau is-Neifion tymherus, gan gynnwys K2-18 b a sampl o ymgeiswyr Hycean posibl. Mae'r arsylwadau hyn yn darparu cyfle digynsail i ymchwilio i gemeg, hinsawdd, a phresadwyedd posibl planedau sy'n meddiannu rhanbarth o'r gofod paramedr nad oedd yn hygyrch o'r blaen.
Biolofnodion a modelu atmosfferig
Ni all arsylwadau ar eu pennau eu hunain sefydlu presenoldeb bywyd heb fframweithiau damcaniaethol cadarn. Mae fy ymchwil felly yn datblygu modelau atmosfferig ac ystadegol i ddehongli biolofnodion a meintioli eu harwyddocâd. Mae gen i ddiddordeb arbennig mewn penderfynu sut y gall arsylwadau atmosfferig gyfyngu ar amlder bydoedd sy'n dwyn bywyd—y term fL yn yr Hafaliad Drake. Mae hyn yn cynnwys datblygu fframweithiau ystadegol, fel y rhai a gyflwynwyd yn fy mhapur MNRAS ar gysyniad cenhadaeth DRAKE, ynghyd â modelau atmosfferig sy'n gwella ein dealltwriaeth o gynhyrchu, cadwraeth a chanfyddadwyedd biolofnodion.
2. Esbonio amrywiaeth atmosfferau planedol
Astudiaethau atmosfferig cymharol gyda JWST
Rwy'n defnyddio arsylwadau JWST i ymchwilio i'r prosesau ffisegol a chemegol sy'n siapio atmosfferau exoplanet ar draws ystod eang o amgylcheddau planedol. Ochr yn ochr â rhaglenni arsylwadol sy'n targedu is-Neifion tymherus, rwy'n datblygu offer dadansoddi ar gyfer echdynnu sbectrwm atmosfferig o arsylwadau JWST. Mae hyn yn cynnwys datblygu JexoPipe, piblinell lleihau a dadansoddi pwrpasol, a JexoSim, efelychydd parth amser ar gyfer cynhyrchu arsylwadau realistig a phrofi methodolegau adfer.
Arolwg Cawr Nwy Oer Twinkle
Rwy'n arwain y Twinkle Cool Gas Giant Survey, arolwg cymharol ar raddfa fawr o exoplanets enfawr tymherus. Mae'r arolwg wedi'i gynllunio i archwilio poblogaeth o blanedau sydd heb eu hastudio i raddau helaeth sy'n pontio'r bwlch rhwng Iau poeth a phlanedau enfawr oer Cysawd yr Haul ein hunain. Trwy fesur cyfansoddiad atmosfferig, cemeg, a thueddiadau byd-eang ar draws sampl ystadegol arwyddocaol, bydd yr arolwg yn sefydlu sylfeini astudiaethau cymharol o exoplanetau enfawr tymherus.
Arsylwadau Telesgop Gofod Hubble
Mae fy ymchwil hefyd wedi cynnwys sbectrosgopeg Telesgop Gofod Hubble i ymchwilio i amrywioldeb atmosfferig ac esblygiad planedol. Mae prosiectau blaenorol yn cynnwys astudiaethau o'r Neifion poeth LTT-9779 b a newidiadau amserol yn atmosffer y meincnod poeth Jupiter HD 209458 b.
3. Datblygu'r Genhedlaeth Nesaf o Arsyllfeydd Exoplanet
Ochr yn ochr â'm hymchwil arsylwadol, rwy'n cyfrannu at ddylunio a datblygu gwyddonol cyfleusterau exoplanet yn y dyfodol. Rwyf wedi chwarae rhan flaenllaw mewn efelychiadau perfformiad, modelu offerynnau, a datblygu meddalwedd ar gyfer cenhadaeth Ariel ESA, gan gynnwys datblygu piblinell lleihau data Ariel wreiddiol (ADaRP) a fersiynau olynol o'r efelychydd ExoSim. Rwy'n parhau i gyfrannu trwy rolau arwain yng ngweithgorau gwyddoniaeth a segment daear Ariel, gan gynnwys ymgynnull y Gweithgor Gwyddoniaeth Gyflenwol.
Gweledigaeth hirdymor
Dros y degawd nesaf, rwy'n anelu at gyfuno JWST, Twinkle, Ariel, ac arsyllfeydd y dyfodol i adeiladu dealltwriaeth gydlynol o atmosfferau planedol ar draws ystod eang o amgylcheddau. Trwy gysylltu ffiseg atmosfferig, planedoleg gymharol, ac astrobioleg, fy nod yw penderfynu sut mae atmosfferau planedol yn esblygu, pa mor gyffredin y gall amgylcheddau byw fod, ac yn y pen draw sut y gall arsylwadau gyfyngu ar gyffredinrwydd bywyd yn y Bydysawd.
Datblygwyd meddalwedd
- ExoSim, SpotSim, ExoSim_N, JexoSim (efelychydd JWST), TwinkleSim, ADaRP, JexoPipe
Addysgu
Addysgu israddedig cyfredol
- PX4245 / PXT145 Exoplanets a'r Chwilio am Oes: Trefnydd Modiwl
- PX2140 Sêr a Phlanedau: Dirprwy Drefnydd y Modiwl
- Yn ogystal, rwy'n DMO ar gyfer Electromagnetiaeth a Thonnau, ac Astroffiseg ar Waith
Addysgu israddedig blaenorol
- PX1127 Planet Earth: Trefnydd Modiwl
- PX2140 Stars and Planets: darlithydd gwadd
- PX1127 Planet Earth: Dirprwy Drefnydd Modiwl
- PX2134 Rhaglennu Strwythuredig: Goruchwyliwr labordy
- PX1125 Ymarfer Mathemategol ar gyfer y Gwyddorau Ffisegol: Marciwr
- PX1222 Dulliau Mathemategol ar gyfer Ffisegwyr 2: Marciwr
Arall
- Rwy'n goruchwylio prosiectau ymchwil PhD, MPhys, MSc a BSc (gweler y dudalen goruchwylio)
Bywgraffiad
Education
- PhD, Astrophysics, Cardiff University
- MSc (Distinction), Space Science, University College London
- Diploma in Physics (Distinction), Open University
- MA, Natural Sciences, Cambridge University
- MB, BChir, Medicine, Cambridge University
- Grad. Cert. Applied Sciences, Space Studies, University of South Australia
- Space Studies Program, International Space University
Aelodaethau proffesiynol
- Fellow of the Royal Astronomical Society
- Fellow of the Higher Education Academy
Safleoedd academaidd blaenorol
- 2026-Presennol: Uwch Ddarlithydd, Prifysgol Caerdydd
- 2022-2026: Darlithydd mewn Nodweddu Exoplanet, Ysgol Ffiseg a Seryddiaeth, Prifysgol Caerdydd
- 2017-2021: Cydymaith Ymchwil Ôl-ddoethurol, Prifysgol Caerdydd
- 2013-2017: Myfyriwr Ymchwil Ôl-raddedig, Prifysgol Caerdydd
- 2003-2005: Ymchwilydd Gwadd, Swyddfa Meddygaeth Gofod a Systemau Gofal Iechyd, Canolfan Ofod Johnson NASA, Houston.
- 2003-2005: Darlithydd er Anrhydedd mewn Gwyddorau Bywyd Gofod, Adran Ffiseg y Gofod a'r Hinsawdd, Coleg Prifysgol Llundain
Allgymorth a'r Cyfryngau
- Cyfweliad BBC Radio Wales Science Cafe am daith ofod ARIEL (Ebrill 2018).
- Cyfweliad podlediad Seryddiaeth Pythagorean am TESS, ARIEL a theithiau exoplanet eraill (Ebrill 2018).
- Sgyrsiau Exoplanet ar gyfer Rhaglenni Haf Lefel UG Caerdydd 2018/19.
- Sôn syllu ar y sêr ac arsylwi telesgop gyda Sgowtiaid (Gwanwyn 2019).
- Sgwrs seryddiaeth ar-lein gyda Sgowtiaid (Gaeaf 2020).
- Cyfweliad cylchgrawn 'All About Space' am genhadaeth Ariel ('Rise of the Exoplanet Hunter') (Ionawr 2021).
- Fideo YouTube cenhadaeth Twinkle ('Yr Aelodau Sefydlu') (Awst 2021).
- Cyfweliad podlediad Seryddiaeth Pythagorean am raglen arsylwi JWST (Rhagfyr 2021).
- Fideo YouTube Ysgol Ffiseg a Seryddiaeth Caerdydd am JWST (Rhagfyr 2021).
- Cyfweliad BBC News Wales am exoplanets a JWST (Gorffennaf 2022).
- Erthygl Newyddion a Barn Natur ar JWST (Chwefror 2023).
- Datganiad i'r wasg NASA / ESA ar arsylwi JWST K2-18 b (Medi 2023)
- Cyfweliad BBC News ('Bywyd estron yn y Bydysawd') (Medi 2023)
- Cyfweliad Le Parisien (Medi 2023)
- Cyfweliad Hindustan Times (Medi 2023)
- Cyfweliad News9Live (India) (Medi 2023)
- Cyfweliad cylchgrawn Kosmo (Yr Eidal) (Hydref 2023)
- Gŵyl Ffiseg IoP, prif siaradwr ('Exoplanets and the Search for Life') (Tachwedd 2023)
- Siaradwr Seryddiaeth ar Tap (Caerdydd) (Tachwedd 2023)
- Caerdydd/Caergrawnt Datganiad i'r wasg ar K2-18 b (Ebrill 2025)
- Erthygl BBC News ar K2-18 b (Ebrill 2025)
- Cyfweliad BBC Wales Radio (Ebrill 2025)
- Cyfweliad radio RTE (Ebrill 2025)
- Cyfweliad teledu Sky News ("The News Hour with Mark Austin") (Ebrill 2025)
- Cyfweliad podlediad The Standard (Ebrill 2025)
- Cyfweliad BBC Future "Exploring the peculiar smells of outer space" (Mai 2025)
- Cyfweliad "Byd Gwyddoniaeth" Scholastic (Mehefin 2025)
- Cyfweliad teledu Sky News ("Y Byd gyda Yalda Hakim") (Chwefror 2026)
- Fideo cyfryngau cymdeithasol Prifysgol Caerdydd am fywyd estron (Mawrth 2026)
Pwyllgorau ac adolygu
- Fi yw'r tiwtor derbyn ôl-raddedig ar gyfer y Grŵp Seryddiaeth.
- Ar hyn o bryd rwy'n gwasanaethu ar y pwyllgorau ysgol canlynol: a) Cydraddoldeb, amrywiaeth a chynhwysiant (EDI), b) Yr Amgylchedd a chynaliadwyedd.
- Rydw i ar dîm rheoli Prosiect Ymgysylltu Ysgolion CHART-GEI a thîm rheoli Grŵp Offeryniaeth Seryddiaeth.
- Rwyf wedi gwasanaethu o'r blaen ar y pwyllgor Moeseg a'r panel cymeradwyo MSc.
- Aelod panel exoplanet JWST TAC ar gyfer cylch 3 a chylch 4
- Adolygydd grant ar gyfer Asiantaeth Ymchwil Genedlaethol Ffrainc ac UKRI.
- Rwyf wedi cyfeirio cyhoeddiadau ar gyfer cyfnodolion gan gynnwys PASP, Nature a International Jourmal of Astrobiology.
Meysydd goruchwyliaeth
Goruchwyliaeth gyfredol
- Ar hyn o bryd rwy'n brif oruchwyliwr PhD ar gyfer Megan Mealing.
- Graddiodd fy myfyriwr PhD blaenorol, Luke Booth, yn 2026.
- Ar hyn o bryd rydw i ar y tîm goruchwylio fel mentor ar gyfer nifer o fyfyrwyr PhD.
- Ar hyn o bryd rwy'n goruchwylio'r prosiect israddedig "Exoplanet transmission spectroscopy"
Goruchwyliaeth gyfredol
Prosiectau'r gorffennol
- Mae prosiectau israddedig ac MSc blaenorol yn cynnwys: "Teithiau i'r Planedau", "Exomoons habitable", "Sbectrosgopeg trosglwyddo dŵr", "Dylunio telesgop i arsylwi atmosffer planed tebyg i'r Ddaear", "Efelychiadau ar gyfer cenhadaeth ofod Twinkle", "Effaith smotiau seren ar sbectrosgopeg trosglwyddo exoplanet"
News articles
Contact Details
[email protected]
+44 29225 14790
Adeiladau'r Frenhines - Adeilad y Gogledd, Ystafell N/2.11, 5 The Parade, Heol Casnewydd, Caerdydd, CF24 3AA
+44 29225 14790
Adeiladau'r Frenhines - Adeilad y Gogledd, Ystafell N/2.11, 5 The Parade, Heol Casnewydd, Caerdydd, CF24 3AA
Themâu ymchwil
Arbenigeddau
- Exoplanets
- Astrofioleg
