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Gas temperatures in Vega-type stars

Published online by Cambridge University Press:  26 May 2016

Iain M. Coulson ,
Dolores M. Walther  and
William R.F. Dent
Iain M. Coulson
Affiliation:
Joint Astronomy Centre, Hilo, Hawaii, 96720, U.S.A.
Dolores M. Walther
Affiliation:
Gemini 8m Telescope Project, Hilo, Hawaii, 96720, U.S.A.
William R.F. Dent
Affiliation:
Royal Observatory Edinburgh, Edinburgh EH9 3HJ, U.K.

Abstract

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Further observations of the submillimetre CO lines in 3 Vega-type stars are reported and interpreted for the gas temperatures they imply. Very low gas temperatures (∽15K) are deduced for all three stars, consolidating the suggestion that, if the gas and dust are remnants of the molecular cloud from which the star system formed, then much of the CO in these systems may be locked up in ices on the surfaces of dust grains.

Type
Part IV: Protoplanetary and β Pic disks
Information
Symposium - International Astronomical Union , Volume 202: Planetary Systems in the Universe – Observation, Formation and Evolution , 2004 , pp. 325 - 327
Copyright
Copyright © Astronomical Society of the Pacific 2004 

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