Detection of circumstellar gas associated with GG Tauri

Details Detection of circumstellar gas associated with GG Tauri Detection of circumstellar gas associated with GG Tauri

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...409..422s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 409, no. 1, p. 422-428.

Astronomy and Astrophysics

Astrophysics

28

Interstellar Gas, Interstellar Matter, Pre-Main Sequence Stars, Radio Spectra, Stellar Envelopes, Taurus Constellation, Carbon Isotopes, Carbon Monoxide, Line Of Sight, Line Shape, Line Spectra

Scientific paper

Double-peaked (C-12)O (1-0) emission centered on the young T Tauri star GG Tau possesses a line profile which may be modeled on the assumption that CO emission arises in an extended circumstellar disk. While bounds on the observed gas mass can be estimated on this basis, it is suggested that a large amount of mass could lie within a small and optically thick region, escaping detection due to beam-dilution effects. In addition, CO may no longer accurately trace the gas mass due to its dissociation, or freezing into grains, or due to the locking-up of carbon into more complex molecules.

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