2001A&A...378L..29L


Query : 2001A&A...378L..29L

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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Number of rows : 3
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 * omi Cet Mi* 02 19 20.79210 -02 58 39.4956   7.63 6.53 5.03   M5-9IIIe+DA 1467 0
2 * alf Ori s*r 05 55 10.30536 +07 24 25.4304 4.38 2.27 0.42 -1.17 -2.45 M1-M2Ia-Iab 1525 0
3 IRC +10216 C* 09 47 57.40632 +13 16 43.5648     10.96     C9,5e 2201 0

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2021.08.05-14:39:39

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