Astronomy and Astrophysics – Astronomy
Scientific paper
May 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aas...198.4809b&link_type=abstract
American Astronomical Society, 198th AAS Meeting, #48.09; Bulletin of the American Astronomical Society, Vol. 33, p.851
Astronomy and Astrophysics
Astronomy
Scientific paper
Advances in infrared instrumentation have recently allowed for searches of cometary volatiles in preplanetary disks around minimally embedded or isolated young stellar objects (YSO's). We will present infrared spectra of several HAeBe and TTauri stars and discuss the presence and implications of a variety of organic volatiles detected. The data were obtained from preliminary observations using two high-resolution (lamda/dlambda 20,000) infrared spectrometers (NIRSPEC at Keck II and CSHELL at IRTF). The results will be used to probe the gas composition in pre-planetary YSO disks in order to test conditions in comet forming regions. Measuring the column density and abundance of organic molecules found in the pre-planetary disks is key to testing models of photo-processing and for comparing to the abundance of volatile molecules in comets. The observations demonstrate the feasibility of this study as a new tool for quantifying physical conditions in planet-forming regions.
Brittain Sean D.
Rettig Terrence W.
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