2000A&A...363.1065H


Query : 2000A&A...363.1065H

2000A&A...363.1065H - Astronomy and Astrophysics, volume 363, 1065-1080 (2000/11-3)

H2 in the 2 micron infrared spectra of long period variables. I. Observations.

HINKLE K.H., ARINGER B., LEBZELTER T., MARTIN C.L. and RIDGWAY S.T.

Abstract (from CDS):

Up to seven lines in the S branch of molecular hydrogen have been detected in the 2µm infrared absorption line spectra of long period variables. The H2 lines show very strong phase dependent changes in velocity, equivalent width, and line profile, with the strongest lines near minimum light. The strength of the H2 lines also depends on variable type with Mira variables having deep lines (at minimum light), SRa variables generally having detectable lines, and the SRb and non-variables having weak to non-detectable lines. In addition H2 line strengths depend on period and on C/O abundance, with long period (i.e. cool), pure S-type Miras having H2 lines with central depths of up to 80%. The appearance of H2 lines in the spectra of cool giants is linked with geometrical extension of the atmosphere. The greatly increased strength of the H2 lines in Mira variables is observational evidence of the role of stellar pulsation in greatly extending these stellar atmospheres. Weak emission is seen in H2 near maximum light in Miras. We suggest this is resonant scattering in the spherically extended stellar atmosphere. The significant role of H2 opacity in the blue is noted.

Abstract Copyright:

Journal keyword(s): line: profiles - stars: AGB and post-AGB - stars: atmospheres - stars: variables: general - infrared: stars

Simbad objects: 30

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Number of rows : 30
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 V* WZ Cas C* 00 01 15.8567946264 +60 21 19.025920224 8.77 9.47 7.13     C-N7III: 310 0
2 V* X And S* 00 16 09.5930847264 +47 00 44.476093440           S2.5-5/6-7e 48 0
3 V* T Cas Mi* 00 23 14.2708079496 +55 47 33.231320160   10.14 8.87     M7-9e 233 0
4 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 344 0
5 V* W Cas C* 00 54 53.8485356496 +58 33 49.148976420   11.32 11.32     C9,1e 132 0
6 * omi Cet Mi* 02 19 20.79210 -02 58 39.4956   7.63 6.53 5.03   M5-9IIIe+DA 1486 0
7 V* IK Tau Mi* 03 53 28.8924743304 +11 24 21.895183368 16.99 17.03 13.39 7.29 3.20 M7-11 600 0
8 V* T Cam S* 04 40 08.8691608872 +66 08 48.640486308 10.72 9.65 7.30     S5-6/5e 113 0
9 V* R Aur S* 05 17 17.6915798904 +53 35 10.031931312   7.8 6.5     M6.5-8.5e 224 0
10 V* U Ori Mi* 05 55 49.1707632432 +20 10 30.677904084 6.82 6.39 5.40     M6-9.5e 479 0
11 V* R Leo Mi* 09 47 33.4839808805 +11 25 43.823283729 9.22 8.94 7.53 3.39 0.12 M7-9e 891 1
12 V* R Vir Mi* 12 38 29.9338039680 +06 59 19.028080356 10.26 9.04 7.48 5.62 3.91 M3.5-7e 193 0
13 V* S UMa S* 12 43 56.6759612760 +61 05 35.501371908   11.3 7.10     S0.5-6/6e 165 1
14 V* R Hya Mi* 13 29 42.7818674 -23 16 52.774679 7.26 6.58 4.97 2.27 -0.15 M6-9e 471 0
15 V* W Hya Mi* 13 49 02.0018313132 -28 22 03.532006894   8.97 7.70     M7.5-9e 622 0
16 V* X Oph Mi* 18 38 21.1323356928 +08 50 02.806199880 8.61 7.72 6.40     M0-8e+K2:III 271 1
17 V* ST Sgr S* 19 01 29.1966290472 -12 45 34.097956812   12.13 7.20     S6-7.5/2.5e 70 0
18 V* R Aql OH* 19 06 22.2510922392 +08 13 48.012661776 8.06 7.69 6.09     M6.5-9e 547 0
19 V* V450 Aql LP* 19 33 46.0320196104 +05 27 56.529751716   8.00 6.48     M5-M5.5III 55 0
20 V* R Cyg S* 19 36 49.3579856496 +50 11 59.727536988   9.96 6.10   6.447 S4-8/6e 268 1
21 * chi Cyg S* 19 50 33.9243904 +32 54 50.609683 7.02 6.06 4.24 1.81 -0.01 S6-9/1-2e 675 0
22 V* T Cep Mi* 21 09 31.7834766408 +68 29 27.231070884 9.15 8.82 7.33     M6-9e 373 0
23 V* S Cep C* 21 35 12.8233100592 +78 37 28.185141792   12.13 7.40     C7,3e 254 0
24 V* W Cyg LP* 21 36 02.4961902 +45 22 28.529170 8.21 6.97 5.38 3.03 0.89 M4e-M6eIII 177 0
25 V* RU Cyg Mi* 21 40 39.0914354280 +54 19 28.954365060   9.14 7.29     M7II-III 106 0
26 V* LX Cyg C* 21 55 57.0262652688 +48 20 52.522680876   13.22 10.49     C 36 1
27 V* SV Peg AB* 22 05 42.0835861728 +35 20 54.562625016   10.06 9.20     M7 128 0
28 V* SV Cas Mi* 23 39 01.4249385000 +52 15 44.861764932   9.79 8.54     M5 40 0
29 V* R Aqr Sy* 23 43 49.4634303216 -15 17 04.176349872   8.823 7.683 9.37   M6.5-8.5e 763 0
30 V* R Cas Mi* 23 58 24.8682785040 +51 23 19.713029388 6.71 6.63 4.80     M6.5-9e 690 0

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2022.05.24-05:18:58

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