2002A&A...384..965B


Query : 2002A&A...384..965B

2002A&A...384..965B - Astronomy and Astrophysics, volume 384, 965-981 (2002/3-4)

CO 1st overtone spectra of cool evolved stars: Diagnostics for hydrodynamic atmosphere models.

BIEGING J.H., RIEKE M.J. and RIEKE G.H.

Abstract (from CDS):

We present spectra covering the wavelength range 2.28 to 2.36µm at a resolution of Δλ=0.0007µm (or R=3500) for a sample of 24 cool evolved stars. The sample comprises 8 M supergiants, 5 M giants, 3 S stars, 6 carbon stars, and 2 RV Tauri variables. The wavelengths covered include the main parts of the 12C16O v=2-0 and 3-1 overtone bands, as well as the v=4-2 and 13CO v=2-0 bandhead regions. CO lines dominate the spectrum for all the stars observed, and at this resolution most of the observed features can be identified with individual CO R- or P-branch lines or blends. The observed transitions arise from a wide range of energy levels extending from the ground state to E/k>20000K. We looked for correlations between the intensities of various CO absorption line features and other stellar properties, including IR colors and mass loss rates. Two useful CO line features are the v=2-0 R14 line, and the CO v=2-0 bandhead. The intensity of the 2-0 bandhead shows a trend with K-[12] color such that the reddest stars (K-[12]>3mag) exhibit a wide range in 2-0 bandhead depth, while the least reddened have the deepest 2-0 bandheads, with a small range of variation from star to star. Gas mass loss rates for both the AGB stars and the red supergiants in our sample correlate with the K-[12] color, consistent with other studies. The data imply that stars with {dot}(M)gas<5x10–7M/y exhibit a much narrower range in the relative strengths of CO 2-0 band features than stars with higher mass loss rates. The range in observed spectral properties implies that there are significant differences in atmospheric structure among the stars in this sample.

Abstract Copyright:

Journal keyword(s): stars: AGB and post-AGB - stars: atmospheres - stars: supergiants - infrared: stars

Simbad objects: 47

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Number of rows : 47
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 V* KU And Mi* 00 06 52.7571912336 +43 05 02.363566416       14.12   M10 84 0
2 * tet And ** 00 17 05.5023632446 +38 40 53.888625622 4.72 4.67 4.61 4.53 4.52 A2V 180 0
3 HD 1561 * 00 20 05.1661061352 +48 51 55.615971024 6.600 6.560 6.530     A0Vs 41 0
4 V* T Cas Mi* 00 23 14.2708079496 +55 47 33.231320160   10.14 8.87     M7-9e 239 0
5 V* R And S* 00 24 01.9457463096 +38 34 37.370144352 10.61 9.36 7.39 4.45 2.30 S5-7/4-5e 355 0
6 HD 2054 SB* 00 25 06.4104962808 +53 02 48.414792012 5.38 5.654 5.719     B9IV 68 0
7 V* HV Cas C* 01 11 03.4682297496 +53 43 40.246817376     12.90 9.79   C4,3e 85 0
8 * tet Cas PM* 01 11 06.1620929203 +55 08 59.638991981 4.630 4.510 4.330 4.16 4.09 A7V 202 0
9 V* R Scl C* 01 26 58.0939182720 -32 32 35.439234828 17.26 9.59 5.72 3.69 2.30 C-N5+ 332 0
10 V* W And S* 02 17 32.9612209924 +44 18 17.757276489   9.62   7.39   S7-8/1e-M7Se 215 1
11 * c And PM* 02 19 16.7969275675 +47 22 47.913234056   5.310 5.310     A0V 65 0
12 V* SU Per s*r 02 22 06.8948309496 +56 36 14.893650072 13.86 11.57 9.40     M3-M4Iab 145 0
13 V* S Per s*r 02 22 51.7113133056 +58 35 11.422774248 13.22 10.55 7.90     M4.5-7Iae 376 0
14 HD 18262 PM* 02 56 13.7672430696 +08 22 53.623894908   6.431 5.963     F6III-IVs 84 0
15 HD 232820 C* 03 41 29.5964236008 +51 30 11.728132920   12.14 8.140     C5,5_MS4 71 0
16 HD 23258 * 03 44 28.2037966608 +20 55 43.448620908   6.100 6.074     A0Vp_lB 57 0
17 HD 23552 Be* 03 48 18.0746021928 +50 44 12.357606372 5.88 6.20 6.14     B8V 88 0
18 V* IK Tau OH* 03 53 28.8924743304 +11 24 21.895183368 16.99 14.463 16.171 14.101   M7-11 640 0
19 V* RV Tau RV* 04 47 06.7239850584 +26 10 45.532913268   11.00 9.80     K3Ibe 279 1
20 V* TT Tau C* 04 51 31.2645256728 +28 31 36.866648748   11.0 10.20     C-N5+ 96 0
21 HD 30912 PM* 04 52 47.1169861176 +27 53 50.963387784   6.328 5.961     F2IVn 63 0
22 IRC +10216 C* 09 47 57.40632 +13 16 43.5648           C9,5e 2344 0
23 V* AC Her RV* 18 30 16.2373118976 +21 52 00.599340000 8.00 7.79 7.01     F4Ibp 340 0
24 HD 171623 ** 18 35 12.5919974496 +18 12 12.293953884 5.670 5.780 5.790     A0Vn 51 0
25 V* W Aql S* 19 15 23.3572741560 -07 02 50.333886492   12.72 10.14 10.21   S6/6e 231 0
26 V* V1691 Aql dS* 19 25 01.5293919552 -04 53 04.419956796   6.831 6.499     F0V 50 0
27 * chi Cyg S* 19 50 33.9213430345 +32 54 50.575531294 7.02 6.06 4.24 1.81 -0.01 S6-9/1-2e 694 0
28 * 36 Cyg * 20 18 28.6552175232 +36 59 59.295169896 5.64 5.64 5.58   5.51 A2V 75 0
29 HD 193702 ** 20 20 15.21965 +39 24 11.5969           A1V 93 0
30 V* BI Cyg s*r 20 21 21.8869298736 +36 55 55.728708060   11.48 8.40     M4Iab 105 0
31 V* KY Cyg s*r 20 25 58.0435428576 +38 21 07.671813480   13.62 13.50     M3Ia 99 0
32 V* AD Cyg S* 20 31 36.5133153840 +32 33 52.355493648   11.22 8.87     S5/5 64 0
33 HD 196629 * 20 37 32.7097457928 +31 31 18.879160116   6.841 6.496     F0V 53 0
34 V* V Cyg C* 20 41 18.2676815496 +48 08 28.810980420   14.05 7.70 6.67   C7,4eJ 306 0
35 NML Cyg s*r 20 46 25.5392819088 +40 06 59.464289232           M7/8 508 0
36 HD 198151 ** 20 46 38.5930632264 +46 31 54.084444456   6.359 6.303     A3V 43 0
37 V* UX Cyg OH* 20 55 05.5117404456 +30 24 52.015482108       10.404   M6-6.5e 164 0
38 * nu. Cyg ** 20 57 10.4187305125 +41 10 01.671428052 3.96 3.96 3.94 3.89 3.89 A0IIIn 160 0
39 V* V460 Cyg C* 21 42 01.0830893088 +35 30 36.719916552 12.97 8.32 5.84 4.10 2.71 C-N5 212 1
40 V* RV Cyg C* 21 43 16.3287822384 +38 01 02.979540552   12.01 10.80     C-N5: 133 0
41 * 79 Cyg ** 21 43 25.6523360208 +38 17 00.927883932   5.688 5.695     A0V 46 1
42 * mu. Cep s*r 21 43 30.4595558543 +58 46 48.165937434 8.85 6.43 4.08 1.98 0.22 M2-Ia 669 1
43 HD 208095 Ce* 21 52 01.0393576752 +55 47 48.298534764 5.11 5.550 5.657     B6IV-V 100 0
44 RAFGL 3068 C* 23 19 12.60744 +17 11 33.1332           C 270 0
45 V* PZ Cas s*r 23 44 03.2814215136 +61 47 22.190200476 12.80 11.48 8.90 6.08 3.90 M3Ia 202 0
46 HD 223386 PM* 23 48 53.9708557608 +59 58 44.242748796   6.311 6.324     A0V 57 0
47 V* TZ Cas s*r 23 52 56.2368865872 +61 00 08.391548016 14.18 11.75 9.18 9.51   M3Iab 92 0

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