First results on Martian carbon monoxide from Herschel/HIFI observations
Abstract
We report on the initial analysis of Herschel/HIFI carbon monoxide (CO) observations of the Martian atmosphere performed between 11 and 16 April 2010. We selected the (7-6) rotational transitions of the isotopes ^{13}CO at 771 GHz and C^{18}O at 768 GHz in order to retrieve the mean vertical profile of temperature and the mean volume mixing ratio of carbon monoxide. The derived temperature profile agrees within less than 5 K with general circulation model (GCM) predictions up to an altitude of 45 km, however, show about 12-15 K lower values at 60 km. The CO mixing ratio was determined as 980 \pm 150 ppm, in agreement with the 900 ppm derived from Herschel/SPIRE observations in November 2009.
Keywords
Cite
@article{arxiv.1007.1291,
title = {First results on Martian carbon monoxide from Herschel/HIFI observations},
author = {P. Hartogh and M. I. Błęcka and C. Jarchow and H. Sagawa and E. Lellouch and M. de Val-Borro and M. Rengel and A. S. Medvedev and B. M. Swinyard and R. Moreno and T. Cavalié and D. C. Lis and M. Banaszkiewicz and D. Bockelée-Morvan and J. Crovisier and T. Encrenaz and M. Küppers and L. -M. Lara and S. Szutowicz and B. Vandenbussche and F. Bensch and E. A. Bergin and F. Billebaud and N. Biver and G. A. Blake and J. A. D. L. Blommaert and J. Cernicharo and L. Decin and P. Encrenaz and H. Feuchtgruber and T. Fulton and T. de Graauw and E. Jehin and M. Kidger and R. Lorente and D. A. Naylor and G. Portyankina and M. Sánchez-Portal and R. Schieder and S. Sidher and N. Thomas and E. Verdugo and C. Waelkens and A. Lorenzani and G. Tofani and E. Natale and J. Pearson and T. Klein and C. Leinz and R. Güsten and C. Kramer},
journal= {arXiv preprint arXiv:1007.1291},
year = {2010}
}
Comments
Accepted for publication in Astronomy and Astrophysics (special issue on HIFI first results); minor changes to match published version