2016A&A...585A.111L


C.D.S. - SIMBAD4 rel 1.7 - 2020.01.19CET13:56:18

2016A&A...585A.111L - Astronomy and Astrophysics, volume 585A, 111-111 (2016/1-1)

The long-period variables in ω Centauri.

LEBZELTER T. and WOOD P.R.

Abstract (from CDS):

Recent studies have detected multiple populations in globular clusters. The massive globular cluster ωCen hosts at least three populations of different metallicity. The most metal-rich one is thought to show also an overabundance of He. These differences should become visible in the structure, evolution, and pulsation of its stars. We aim to study the effects of the different starting compositions of the three populations in ωCen on the most luminous red giants in this cluster. The long-periodic variability of evolved stars in ωCen opens a comparably easy access window to the structure and composition of these objects. We made a detailed search for long-period variables (LPVs) in ωCen leading to the detection of many new variables and period determinations for a significant number of them. Periods and luminosities were then compared with the most recent pulsation models for these kinds of stars. Some of the LPVs belong to each of the main metallicity sub-groups of ωCen. Almost all detected variables with periods are fundamental mode pulsators. For the metal-rich group, our comparison with pulsation models favours a high He abundance of Y=0.4. Our study can be considered an independent piece of evidence supporting a high helium abundance among the metal-rich stars in ωCen.

Abstract Copyright:

Journal keyword(s): stars: AGB and post-AGB - stars: variables: general - globular clusters: individual: ω Centauri

VizieR on-line data: <Available at CDS (J/A+A/585/A111): table1.dat table3.dat table4.dat>

Simbad objects: 55

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Number of rows : 55

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 NGC 104 GlC 00 24 05.359 -72 04 53.20   5.78 4.09     ~ 3483 0
2 NGC 362 GlC 01 03 14.26 -70 50 55.6   7.97 6.58     ~ 905 0
3 NGC 419 OpC 01 08 17.79 -72 53 02.8 11.41 11.16 10.50   9.34 ~ 226 0
4 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5441 1
5 NGC 1846 Cl* 05 07 34.900 -67 27 32.45   12.08 11.31     ~ 176 0
6 NGC 1978 GlC 05 28 45.330 -66 14 12.04   10.7 10.70     ~ 263 0
7 GEN# +6.20003147 * 07 22 09.8539232385 -01 25 56.448152302   14.71 14.57     ~ 3 0
8 IRAS 09110-6439 GlC 09 12 03.10 -64 51 48.6   7.77 5.69     ~ 1211 0
9 2MASS J13255871-4736098 RG* 13 25 58.7183544433 -47 36 09.816166272 15.529 13.692 12.091 11.67 10.377 ~ 17 0
10 Cl* NGC 5139 SAW V186 V* 13 26 05.3594359611 -47 28 20.647288340 16.127 14.08 12.43 11.390 10.257 S 31 0
11 2MASS J13260763-4732541 RG* 13 26 07.6238805418 -47 32 54.142841498 14.832 13.412 11.724 10.866 10.134 ~ 13 0
12 V* V825 Cen Mi* 13 26 12.6317260884 -47 24 42.319434667 17.290 13.232 16.014 14.261 10.441 Me 18 0
13 Cl* NGC 5139 SAW V396 V* 13 26 17.57 -47 37 27.7           ~ 2 0
14 WEB 11582 RB? 13 26 25.1215771517 -47 28 50.190585930   13.039 11.419   9.822 ~ 12 0
15 2MASS J13262557-4728479 RG* 13 26 25.5807714263 -47 28 47.977928486 16.00 13.230 11.605     ~ 13 0
16 Cl* NGC 5139 L 55 RB? 13 26 26.0169344381 -47 30 13.626472056   13.377 11.830   10.280 ~ 9 0
17 GCRV 27417 RR* 13 26 30.2026517669 -47 24 27.808672324   14.570 12.757   10.158 M4/M5e 24 0
18 Cl* NGC 5139 L 574 RB? 13 26 33.0565957867 -47 31 00.301285784   13.300 11.624   9.863 ~ 9 0
19 2MASS J13263483-4734110 RG* 13 26 34.8424327986 -47 34 11.119059877 16.056 14.039 12.249 11.306 10.498 ~ 30 0
20 2MASS J13263540-4731484 RG* 13 26 35.4051679688 -47 31 48.489800195 14.70 12.890 11.291     ~ 11 0
21 Cl* NGC 5139 SAW V138 V* 13 26 35.504 -47 31 48.75           ~ 4 0
22 Cl* NGC 5139 L 781 RB? 13 26 36.0402584706 -47 26 54.205622311   13.042 11.620     ~ 10 0
23 2MASS J13263680-4730499 RG* 13 26 36.8084818815 -47 30 49.984861981 15.387 13.579 12.109 11.059 10.297 ~ 13 0
24 Cl* NGC 5139 BPB 227981 RR* 13 26 39.380 -47 26 55.85 15.545 14.956 14.731 14.580 14.152 ~ 9 0
25 2MASS J13264095-4730372 RG* 13 26 40.9651412528 -47 30 37.288090840   13.559 11.868   10.347 ~ 7 0
26 Cl* NGC 5139 LEID 52111 RB? 13 26 41.0005316771 -47 32 49.831934022   13.965 12.347   10.708 ~ 12 0
27 Cl* NGC 5139 L 1295 RB? 13 26 42.5721099560 -47 30 42.264979045   13.097 11.566     ~ 6 0
28 Cl* NGC 5139 LEID 38149 RB? 13 26 43.0713769708 -47 26 39.240542809   13.370 11.762   10.299 ~ 6 0
29 2MASS J13264360-4729382 RB? 13 26 43.608 -47 29 38.22   12.793 11.409     ~ 7 0
30 Cl* NGC 5139 L 1416 RB? 13 26 44.3309039566 -47 29 05.235391698   13.159 11.629     ~ 4 0
31 Cl* NGC 5139 L 1518 RB? 13 26 45.8531993115 -47 26 43.915071179   13.204 11.799   10.329 ~ 4 0
32 NGC 5139 9132 V* 13 26 46.3557745136 -47 29 30.644081673 17.112 15.104 13.585 11.454 10.361 M2.5 31 0
33 NGC 5139 GlC 13 26 47.28 -47 28 46.1   6.12 5.33     ~ 2933 0
34 2MASS J13264772-4729288 RG* 13 26 47.7249528424 -47 29 29.063575662 15.503 13.757 11.621 10.603 9.742 ~ 16 0
35 2MASS J13264839-4730104 RG* 13 26 48.4110575748 -47 30 10.487802532 14.64 12.750 11.357   10.098 ~ 9 0
36 Cl* NGC 5139 L 1764 RB? 13 26 48.8359069277 -47 24 43.257954512   12.980 11.483     ~ 7 0
37 Cl* NGC 5139 L 2110 RB? 13 26 53.2028313445 -47 27 00.609330885   13.084 11.598     ~ 3 0
38 2MASS J13265353-4731582 RG* 13 26 53.5294461313 -47 31 58.387406706   13.475 11.906   10.472 ~ 8 0
39 2MASS J13265499-4728461 RG* 13 26 55.0018367982 -47 28 46.224723793 15.13 13.260 11.686     ~ 9 0
40 2MASS J13265554-4734234 RG* 13 26 55.5525797826 -47 34 23.419164132 15.133 13.57 11.83 10.945 10.006 K4: 39 0
41 WEB 11600 RB? 13 26 56.6370163690 -47 30 40.427459647   13.066 11.583     ~ 8 0
42 2MASS J13265802-4731063 RG* 13 26 58.0278536797 -47 31 06.425912427 14.33 13.150 11.793     ~ 10 0
43 2MASS J13265965-4728073 RG* 13 26 59.6555177453 -47 28 07.467781948   13.329 11.810   10.298 ~ 4 0
44 2MASS J13270118-4720409 RG* 13 27 01.1835608961 -47 20 40.969426980 16.016 13.895 12.451 11.389 10.557 ~ 13 0
45 2MASS J13270243-4731024 RG* 13 27 02.4415434897 -47 31 02.620790328 15.39 13.470 11.877   10.288 ~ 10 0
46 2MASS J13270366-4724380 RG* 13 27 03.6764359679 -47 24 38.111105369 14.86 13.420 11.990   10.624 ~ 12 0
47 Cl* NGC 5139 LEID 41411 * 13 27 04.71 -47 28 04.3   13.250 11.831     ~ 7 0
48 V* V826 Cen LP* 13 27 05.2998974072 -47 29 05.159041351 16.248 15.044 13.386 12.413 10.061 ~ 11 0
49 2MASS J13270647-4725233 RG* 13 27 06.4772248111 -47 25 23.446930678 14.64 12.960 11.471     ~ 10 0
50 2MASS J13270842-4731493 RG* 13 27 08.4449913157 -47 31 49.248581398 15.359 13.546 11.762 10.825 10.035 ~ 14 0
51 2MASS J13271053-4737004 RG* 13 27 10.5472440449 -47 37 00.237186718   13.692 12.037 11.168 10.339 ~ 14 0
52 2MASS J13271192-4729177 RG* 13 27 11.9366306868 -47 29 17.683113250 15.13 13.370 11.786     ~ 25 0
53 2MASS J13271206-4729449 RG* 13 27 12.0772834640 -47 29 44.918288466 14.89 13.140 11.645     ~ 23 0
54 2MASS J13271582-4727546 RG* 13 27 15.8326241917 -47 27 54.573759328 14.942 13.639 11.938 11.000 10.097 ~ 18 0
55 GCRV 27414 V* 13 27 37.7390964568 -47 25 17.383441776 16.849 14.638 13.103 12.092 10.413 M4 21 0

    Equat.    Gal    SGal    Ecl

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2020.01.19-13:56:18

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