Warm HCN, C2H2, CO in the Circumstellar Disk of GV Tau

Details Warm HCN, C2H2, CO in the Circumstellar Disk of GV Tau Warm HCN, C2H2, CO in the Circumstellar Disk of GV Tau

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...209.1009g&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #10.09; Bulletin of the American Astronomical Society, V

Astronomy and Astrophysics

Astronomy

Scientific paper

We present high-resolution, ground-based observations of HCN and C2H2 toward the T Tauri binary star system GV Tau. We detected strong absorption due to HCN ν3 and weak C2H2 (ν3 and ν2+(ν4+ν5)) absorption toward the primary (GV Tau S) but not the infrared companion. We also report CO column densities and rotational temperatures, and present abundances relative to CO of HCN/CO 0.6% and C2H2/CO 1.2% and an upper limit for CH4/CO <0.37% toward GV Tau S. Neither HCN nor \acetylene\ were detected toward the infrared companion, arguing that the gas is located in the circumstellar disk of GV Tau S. Results suggest that HCN may be about a factor of four less abundant toward the infrared companion relative to CO.

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