AAS 200th meeting, Albuquerque, NM, June 2002
Session 78. ISM, SNR, AGB and PNe
Oral, Thursday, June 6, 2002, 10:00-11:30am, Ballroom B

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[78.01] First Results of the HD FUSE Survey

S. Lacour (Johns Hopkins University), F. Le Petit (Obs. Paris-Meudon), P. Sonnentrucker (Johns Hopkins University), M. André, J.M. Désert, R. Ferlet (Institut d'Astrophysique de Paris), E. Roueff (Obs. Paris-Meudon)

We present here some FUSE results obtained on the HD survey. Up to now HD has been detected in more than one hundred lines of sight of the FUSE database. We discuss the observational uncertainties due to the partial saturation of HD transitions. Since in most of lines of sight, lines of HD are saturated, the determination of the b parameter is essential. We expose our method to constrain this value using optical data. Eight lines of sight containing translucent components with color excess ranging between 0.4 and 0.7 have been reduced. We present the fractional abundance HD/H2 as a function of the molecular fraction for the sample. Finally, we interpret the results with a chemical model adapted to the physics of translucent clouds which includes the detailed photodissociation of H2, HD and CO and the thermal balance.

If you would like more information about this abstract, please follow the link to http://www.iap.fr/users/andre/HD.html. This link was provided by the author. When you follow it, you will leave the Web site for this meeting; to return, you should use the Back comand on your browser.

The author(s) of this abstract have provided an email address for comments about the abstract: lacour@pha.jhu.edu

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Bulletin of the American Astronomical Society, 34
© 2002. The American Astronomical Soceity.