2001A&A...376L...1T


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.26CET22:28:24

2001A&A...376L...1T - Astronomy and Astrophysics, volume 376, L1-4 (2001/9-2)

Water in K and M giant stars unveiled by ISO.

TSUJI T.

Abstract (from CDS):

Based on the spectra obtained with Infrared Space Observatory, ISO, we detected the 6.3µm bands of water in the late K giant Aldebaran (α Tau) and several early M giant stars (between M0 and M3.5), which have been deemed to be too warm for tri-atomic H2O molecule to reside in their photospheres. The water column densities range (0.2-2)x1018molecules/cm2 in our sample of K and M giant stars and the excitation temperatures are 1500K or higher. Thus, the water bands are not originating in cool stellar winds either. The presence of water in the K and early M giant stars was quite unexpected from the traditional picture of the atmosphere of the red giant star consisting of the photosphere, hot chromosphere, and cool wind. We confirm that a rather warm molecule forming region should exist as a new component of the atmosphere of red giant stars and that this should be a general phenomenon in late-type stars.

Abstract Copyright:

Journal keyword(s): infrared: stars - molecular processes - stars: atmospheres - stars: chromospheres - stars: individual: A|"CDS/simbad/smb.query.id "@622399" "Name=@622399" submit=submit null|α Tau">{α Tau}, A|"CDS/simbad/smb.query.id "@1500441" "Name=@1500441" submit=submit null|β And">{β And}, A|"CDS/simbad/smb.query.id "@719377" "Name=@719377" submit=submit null|α Cet">{α Cet}, A|"CDS/simbad/smb.query.id "@1546016" "Name=@1546016" submit=submit null|β Peg">{β Peg}, γ Cru - stars: late-type

Simbad objects: 15

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Number of rows : 15

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 * bet And PM* 01 09 43.92388 +35 37 14.0075 5.58 3.62 2.05 0.81 -0.19 M0+IIIa 535 0
2 * omi Cet Mi* 02 19 20.79210 -02 58 39.4956   7.63 6.53 5.03   M5-9IIIe+DA 1445 0
3 * alf Cet LP? 03 02 16.77307 +04 05 23.0596 6.10 4.17 2.53 1.18 0.02 M1.5IIIa 439 0
4 * rho Per LP* 03 05 10.59385 +38 50 24.9943 6.83 5.04 3.39 1.59 -0.03 M4+IIIa 307 0
5 * alf Tau LP? 04 35 55.23907 +16 30 33.4885 4.32 2.40 0.86 -0.37 -1.31 K5+III 1182 1
6 * 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 1489 0
7 * mu. Gem LP* 06 22 57.62686 +22 30 48.8979 6.37 4.51 2.87 1.30 -0.08 M3IIIab 367 1
8 * alf CMa SB* 06 45 08.91728 -16 42 58.0171 -1.51 -1.46 -1.46 -1.46 -1.43 A1V+DA 1405 0
9 V* R Leo Mi* 09 47 33.4839808805 +11 25 43.823283729 9.22 8.94 7.53 3.39 0.12 M7-9e 880 1
10 * gam Cru PM* 12 31 09.95961 -57 06 47.5684 5.01 3.23 1.64 -0.02 -1.44 M3.5III 264 0
11 HD 108925 * 12 31 16.7192755816 -57 04 52.786384504   6.58 6.45     A3V 38 0
12 * alf Boo RG* 14 15 39.67207 +19 10 56.6730 2.46 1.18 -0.05 -1.03 -1.68 K1.5IIIFe-0.5 2148 0
13 * gam Dra * 17 56 36.36988 +51 29 20.0242 5.630 3.760 2.230 1.08 0.23 K5III 518 0
14 * mu. Cep s*r 21 43 30.4610574 +58 46 48.160181 8.85 6.43 4.08 1.98 0.22 M2-Ia 624 1
15 * bet Peg LP* 23 03 46.45746 +28 04 58.0336 6.05 4.09 2.42 0.92 -0.40 M2.5II-III 579 0

    Equat.    Gal    SGal    Ecl

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