Astronomy and Astrophysics – Astrophysics – Earth and Planetary Astrophysics
Scientific paper
2010-07-08
Astron.Astrophys. 521 (2010) L49
Astronomy and Astrophysics
Astrophysics
Earth and Planetary Astrophysics
Accepted for publication in Astronomy and Astrophysics (special issue on HIFI first results); minor changes to match published
Scientific paper
10.1051/0004-6361/201015160
We report on an initial analysis of Herschel/HIFI observations of hydrogen chloride (HCl), hydrogen peroxide (H_2O_2), and molecular oxygen (O_2) in the Martian atmosphere performed on 13 and 16 April 2010 (L_s ~ 77{\deg}). We derived a constant volume mixing ratio of 1400 +/- 120 ppm for O_2 and determined upper limits of 200 ppt for HCl and 2 ppb for H_2O_2. Radiative transfer model calculations indicate that the vertical profile of O_2 may not be constant. Photochemical models determine the lowest values of H_2O_2 to be around L_s ~ 75{\deg} but overestimate the volume mixing ratio compared to our measurements.
Banaszkiewicz Marek
Bensch Frank
Bergin Edwin A.
Billebaud F.
Biver Nicolas
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