Planetary atmosphere observation analysis

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A CONSISTENT RETRIEVAL ANALYSIS OF 10 HOT JUPITERS OBSERVED IN TRANSMISSION

ASTROPHYSICAL JOURNAL 834:1 (2017) ARTN 50

Authors:

JK Barstow, S Aigrain, PGJ Irwin, DK Sing
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Climatological variations in Titan's atmospheric chemistry mapped using ALMA

ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY 254 (2017)

Authors:

Martin Cordiner, Conor Nixon, Steven Charnley, Nick Teanby, Zbigniew Kisiel, Pat Irwin, Maureen Palmer, James Lai, Xander Thelen, Veronique Vuitton
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Exoplanet atmospheres with EChO: spectral retrievals using EChOSim

Chapter in EChO - Exoplanet Characterisation Observatory, Springer Nature (2017) 109-125

Authors:

JK Barstow, Neil E Bowles, S Aigrain, LN Fletcher, PGJ Irwin, R Varley, E Pascale
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The Long wave (11–16 μm) spectrograph for the EChO M3 Mission Candidate study

Chapter in EChO - Exoplanet Characterisation Observatory, Springer Nature (2017) 437-447

Authors:

NE Bowles, M Tecza, JK Barstow, JM Temple, PGJ Irwin, LN Fletcher, S Calcutt, J Hurley, M Ferlet, D Freeman
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Seasonal exposure of carbon dioxide ice on the nucleus of comet 67P/Churyumov-Gerasimenko.

Science (New York, N.Y.) 354:6319 (2016) 1563-1566

Authors:

G Filacchione, A Raponi, F Capaccioni, M Ciarniello, F Tosi, MT Capria, MC De Sanctis, A Migliorini, G Piccioni, P Cerroni, MA Barucci, S Fornasier, B Schmitt, E Quirico, S Erard, D Bockelee-Morvan, C Leyrat, G Arnold, V Mennella, E Ammannito, G Bellucci, J Benkhoff, JP Bibring, A Blanco, MI Blecka, R Carlson, U Carsenty, L Colangeli, M Combes, M Combi, J Crovisier, P Drossart, T Encrenaz, C Federico, U Fink, S Fonti, M Fulchignoni, W-H Ip, P Irwin, R Jaumann, E Kuehrt, Y Langevin, G Magni, T McCord, L Moroz, S Mottola, E Palomba, U Schade, K Stephan, F Taylor, D Tiphene, GP Tozzi, P Beck, N Biver, L Bonal, J-P Combe, D Despan, E Flamini, M Formisano, A Frigeri, D Grassi, MS Gudipati, D Kappel, A Longobardo, F Mancarella, K Markus, F Merlin, R Orosei, G Rinaldi, M Cartacci, A Cicchetti, Y Hello, F Henry, S Jacquinod, JM Reess, R Noschese, R Politi, G Peter

Abstract:

Carbon dioxide (CO2) is one of the most abundant species in cometary nuclei, but because of its high volatility, CO2 ice is generally only found beneath the surface. We report the infrared spectroscopic identification of a CO2 ice-rich surface area located in the Anhur region of comet 67P/Churyumov-Gerasimenko. Spectral modeling shows that about 0.1% of the 80- by 60-meter area is CO2 ice. This exposed ice was observed a short time after the comet exited local winter; following the increased illumination, the CO2 ice completely disappeared over about 3 weeks. We estimate the mass of the sublimated CO2 ice and the depth of the eroded surface layer. We interpret the presence of CO2 ice as the result of the extreme seasonal changes induced by the rotation and orbit of the comet.
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