planets and satellites: atmospheres; radiative transfer; submillimeter: general; molecular processes
Abstract :
[en] We report on an initial analysis of Herschel/HIFI observations of hydrogen chloride (HCl), hydrogen peroxide (H[SUB]2[/SUB]O[SUB]2[/SUB]), and molecular oxygen (O[SUB]2[/SUB]) in the Martian atmosphere performed on 13 and 16 April 2010 (L[SUB]s[/SUB] ~ 77°). We derived a constant volume mixing ratio of 1400 ± 120 ppm for O[SUB]2[/SUB] and determined upper limits of 200 ppt for HCl and 2 ppb for H[SUB]2[/SUB]O[SUB]2[/SUB]. Radiative transfer model calculations indicate that the vertical profile of O[SUB]2[/SUB] may not be constant. Photochemical models determine the lowest values of H[SUB]2[/SUB]O[SUB]2[/SUB] to be around L[SUB]s[/SUB] ~ 75° but overestimate the volume mixing ratio compared to our measurements. Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Hartogh, P.; Max-Planck-Institut für Sonnensystemforschung, 37191 Katlenburg-Lindau, Germany
Jarchow, C.; Max-Planck-Institut für Sonnensystemforschung, 37191 Katlenburg-Lindau, Germany
Lellouch, Emmanuel; LESIA, Observatoire de Paris, 5 place Jules Janssen, 92195 Meudon, France
de Val-Borro, M.; Max-Planck-Institut für Sonnensystemforschung, 37191 Katlenburg-Lindau, Germany
Rengel, M.; Max-Planck-Institut für Sonnensystemforschung, 37191 Katlenburg-Lindau, Germany
Moreno, R.; LESIA, Observatoire de Paris, 5 place Jules Janssen, 92195 Meudon, France
Medvedev, A. S.; Max-Planck-Institut für Sonnensystemforschung, 37191 Katlenburg-Lindau, Germany
Sagawa, H.; Max-Planck-Institut für Sonnensystemforschung, 37191 Katlenburg-Lindau, Germany ; Environmental Sensing & Network Group, NICT, 4-2-1 Nukui-kita, Koganei, Tokyo 184-8795, Japan
Swinyard, B. M.; STFC Rutherford Appleton Laboratory, Harwell Innovation Campus, Didcot, OX11 0QX, UK
Cavalié, T.; Max-Planck-Institut für Sonnensystemforschung, 37191 Katlenburg-Lindau, Germany
Lis, D. C.; California Institute of Technology, Pasadena, CA 91125, USA
Błęcka, M. I.; Space Research Centre, Polish Academy of Sciences, Warsaw, Poland
Banaszkiewicz, M.; Space Research Centre, Polish Academy of Sciences, Warsaw, Poland
Bockelée-Morvan, D.; LESIA, Observatoire de Paris, 5 place Jules Janssen, 92195 Meudon, France
Crovisier, J.; LESIA, Observatoire de Paris, 5 place Jules Janssen, 92195 Meudon, France
Encrenaz, T.; LESIA, Observatoire de Paris, 5 place Jules Janssen, 92195 Meudon, France
Küppers, M.; Rosetta Science Operations Centre, European Space Astronomy Centre, European Space Agency, Spain
Lara, L*-M; Instituto de Astrofísica de Andalucía (CSIC), Spain
Szutowicz, S.; Space Research Centre, Polish Academy of Sciences, Warsaw, Poland
Vandenbussche, B.; Instituut voor Sterrenkunde, Katholieke Universiteit Leuven, Belgium
Bensch, F.; DLR, German Aerospace Centre, Bonn-Oberkassel, Germany
Bergin, E. A.; Astronomy Department, University of Michigan, USA
Billebaud, F.; Université de Bordeaux, Laboratoire d'Astrophysique de Bordeaux, France
Biver, N.; LESIA, Observatoire de Paris, 5 place Jules Janssen, 92195 Meudon, France
Blake, G. A.; California Institute of Technology, Pasadena, CA 91125, USA
Blommaert, J A D L; Instituut voor Sterrenkunde, Katholieke Universiteit Leuven, Belgium
Cernicharo, J.; Laboratory of Molecular Astrophysics, CAB-CSIC, INTA, Spain
Decin, L.; Instituut voor Sterrenkunde, Katholieke Universiteit Leuven, Belgium ; Sterrenkundig Instituut Anton Pannekoek, University of Amsterdam, Science Park 904, 1098 Amsterdam, The Netherlands
Encrenaz, P.; LERMA, Observatoire de Paris, France
Feuchtgruber, H.; Max-Planck-Institut für extraterrestrische Physik, Garching bei München, Germany
de Graauw, T.; SRON Netherlands Institute for Space Research, Landleven 12, 9747 AD, Groningen, The Netherlands ; Leiden Observatory, University of Leiden, The Netherlands ; Atacama Large Millimeter/Submillimeter Array, Joint ALMA Office, Santiago, Chile
Jehin, Emmanuel ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image
Kidger, M.; Science Centre, European Space Astronomy Centre, ESA, PO Box 78, 28691 Villanueva de la Cañada, Madrid, Spain
Lorente, R.; Science Centre, European Space Astronomy Centre, ESA, PO Box 78, 28691 Villanueva de la Cañada, Madrid, Spain
Naylor, D. A.; Department of Physics and Astronomy, University of Lethbridge, Canada
Portyankina, G.; Physikalisches Institut, University of Bern, Switzerland
Sánchez-Portal, M.; Science Centre, European Space Astronomy Centre, ESA, PO Box 78, 28691 Villanueva de la Cañada, Madrid, Spain
Schieder, R.; KOSMA, I. Physik. Institut, Universität zu Köln, Zülpicher Str. 77, 50937 Köln, Germany
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