Carbon stars in the IRTS survey

Details Carbon stars in the IRTS survey Carbon stars in the IRTS survey

2004-12-13

arxiv.org/abs/astro-ph/0412301v1

Astronomy and Astrophysics

Astrophysics

accepted by the PASP; December 7, 2004

Scientific paper

We have identified 139 cool carbon stars in the near-infrared spectro-photometric survey of the InfraRed Telescope in Space (IRTS) from the conspicuous presence of molecular absorption bands at 1.8, 3.1 and 3.8 microns. Among them 14 are new, bright (K ~ 4.0-7.0), carbon stars. We find a trend relating the 3.1 microns band strength to the K-L' color index, which is known to correlate with mass-loss rate. This could be an effect of a relation between the depth of the 3.1 microns feature and the degree of development of the extended stellar atmosphere where dust starts to form.

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