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2001A&A...378L..29L - Astronomy and Astrophysics, volume 378, L29-32 (2001/10-4)
Cold HI in IRC +10216.
LE BERTRE T. and GERARD E.
Abstract (from CDS):
With the recently refurbished Nancay Radiotelescope we have observed the HI 21cm line in the direction of IRC +10216, a typical high mass-loss carbon star. We found HI in absorption indicating that the expanding circumstellar gas may reach very low temperatures (≤4K). The atomic gas could be the product of the photo-dissociation of molecular hydrogen in the outer envelope or result from a previous phase (≥6x103 years ago) of mass loss when the star had a higher effective temperature than now.
Abstract Copyright: ∼
Journal keyword(s): stars: circumstellar matter - stars: mass-loss - stars: AGB and post-AGB - radio lines: stars
Simbad objects: 3
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