The Photodissociation of Formaldehyde in Comets

Details The Photodissociation of Formaldehyde in Comets The Photodissociation of Formaldehyde in Comets

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011iaus..280p.158f&link_type=abstract

The Molecular Universe, Posters from the proceedings of the 280th Symposium of the International Astronomical Union held in Tole

Astronomy and Astrophysics

Astronomy

Scientific paper

Observations of cometary spectra in the 905-1180 Å spectral band made with the Far Ultraviolet Spectroscopic Explorer in 2001 and 2004 show unusual features in the fluorescent emissions of CO and H2. These include emission from a non-thermal high-J rotational population of CO and solar Lyman-alpha induced fluorescence from excited vibrational levels of H2, both of which are attributed to photodissociation of formaldehyde (Feldman et al., ApJ 669, 1104, 2009). In this paper we present further analysis of the large number of observed H2 lines in order to better constrain the H2CO production rate, and we address the question of the rotational and vibrational population of H2 produced from the dissociation of water.

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