2000A&A...361..167L


Query : 2000A&A...361..167L

2000A&A...361..167L - Astronomy and Astrophysics, volume 361, 167-174 (2000/9-1)

A comparison of light and velocity variations in semiregular variables.

LEBZELTER T., KISS L.L. and HINKLE K.H.

Abstract (from CDS):

NIR velocity variations are compared with simultaneous visual light curves for a sample of late-type semiregular variables (SRV). Precise radial velocity measurements are also presented for the SRV V450 Aql. Our aim is to investigate the nature of the irregular light changes found in these variables. Light and velocity variations are correlated in all stars of our sample. Based on these results we discuss several possibilities to explain the observed behavior. We find that pulsation is responsible for large amplitude variations. In a recent paper Lebzelter (1999A&A...351..533L) invoked large convective cells to understand observed velocity variations. This possibility is discussed with respect to the observed correlation between light and velocity changes. In the light of these results we investigate the origin of the semiregular variations.

Abstract Copyright:

Journal keyword(s): stars: variables: general - stars: late-type - stars: AGB and post-AGB - stars: atmospheres

Simbad objects: 16

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Number of rows : 16
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* RY UMa LP* 12 20 27.3276418728 +61 18 34.705813140 10.90 8.70 6.90     M3:III 65 0
2 V* W Hya Mi* 13 49 02.0018313132 -28 22 03.532006894   8.97 7.70     M7.5-9e 622 0
3 V* RV Boo AB* 14 39 15.8615969712 +32 32 22.250745204   9.50 7.90     M5-6IIIe 91 0
4 V* RR CrB LP* 15 41 26.2283819568 +38 33 26.600250528   9.02 8.40     M3 49 0
5 V* ST Her S* 15 50 46.6232210160 +48 28 58.850853780   9.09 7.75     M6S-M7SIII: 158 0
6 V* X Her AB* 16 02 39.1730141112 +47 14 25.265335956   7.64 6.58     M6III 230 0
7 * g Her AB* 16 28 38.5485851 +41 52 54.040593 7.70 6.53 5.01 2.49 0.26 M6-III 370 0
8 V* TX Dra LP* 16 35 00.7152884232 +60 28 05.227778640   8.86 7.36     M5 68 0
9 V* TT Dra LP* 17 12 52.2991567968 +57 51 45.468129168   10.56 9.33     M5 27 0
10 V* V450 Aql LP* 19 33 46.0320196104 +05 27 56.529751716   8.00 6.48     M5-M5.5III 55 0
11 V* RT Cyg Mi* 19 43 37.7664119520 +48 46 41.333575404   9.73 8.45   6.694 M2-7e 132 0
12 * 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
13 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
14 V* RU Cyg Mi* 21 40 39.0914354280 +54 19 28.954365060   9.14 7.29     M7II-III 106 0
15 * mu. Cep s*r 21 43 30.4610574 +58 46 48.160181 8.85 6.43 4.08 1.98 0.22 M2-Ia 646 1
16 V* SV Cas Mi* 23 39 01.4249385000 +52 15 44.861764932   9.79 8.54     M5 40 0

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2022.05.20-18:32:00

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