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

Query : 2016A&A...585A.111L

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

goto Full paper

goto View the references in ADS

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 - 2024 		#notes
1 NGC 104 GlC 00 24 05.359 -72 04 53.20     4.09     ~ 3913 0
2 NGC 362 GlC 01 03 14.26 -70 50 55.6     6.58     ~ 1084 0
3 NGC 419 OpC 01 08 17.26 -72 53 01.8 11.41 11.16 10.50   9.34 ~ 272 0
4 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7059 0
5 NGC 1846 Cl* 05 07 34.900 -67 27 32.45   12.08 11.31     ~ 215 0
6 NGC 1978 GlC 05 28 45.330 -66 14 12.04   10.7 10.70     ~ 308 0
7 GEN# +6.20003147 * 07 22 09.8539871736 -01 25 56.448272424   14.71 14.57     ~ 3 0
8 NGC 2808 GlC 09 12 03.10 -64 51 48.6           ~ 1419 0
9 Cl* NGC 5139 B V53 RG* 13 25 58.7184495096 -47 36 09.822977424 15.529   12.096 11.625 10.377 ~ 22 0
10 NGC 5139 320 RG* 13 26 05.3594650032 -47 28 20.646778584 16.127 14.08 12.43 11.390 10.257 S 36 0
11 Cl* NGC 5139 LEID 52035 RG* 13 26 07.6234639032 -47 32 54.140681832 14.832 13.412 11.724 10.866 10.134 ~ 16 0
12 V* V825 Cen Mi* 13 26 12.6329726136 -47 24 42.326646516 17.290 13.232 16.014 14.261 10.441 Me 21 0
13 Cl* NGC 5139 SAW V396 V* 13 26 17.57 -47 37 27.7           ~ 2 0
14 NGC 5139 35 RB? 13 26 25.1215654296 -47 28 50.192192208   13.039 11.419   9.822 ~ 13 0
15 2MASS J13262557-4728479 RG* 13 26 25.5809037384 -47 28 47.966752812 16.00 13.230 11.605     ~ 14 0
16 NGC 5139 92 RB? 13 26 26.0169779088 -47 30 13.626938772   13.377 11.830   10.280 ~ 10 0
17 Cl* NGC 5139 B V6 LP? 13 26 30.2032252752 -47 24 27.805400064   14.570 12.757   10.158 M4/M5e 27 0
18 NGC 5139 8146 RB? 13 26 33.0569303328 -47 31 00.305383836   13.300 11.624   9.863 ~ 10 0
19 2MASS J13263483-4734110 RG* 13 26 34.8426950352 -47 34 11.125321320 16.056 14.039 12.249 11.306 10.498 ~ 32 0
20 2MASS J13263540-4731484 RG* 13 26 35.4051987720 -47 31 48.491095944 14.70 12.890 11.291     ~ 12 0
21 Cl* NGC 5139 SAW V138 V* 13 26 35.504 -47 31 48.75           ~ 5 0
22 NGC 5139 80 RB? 13 26 36.0402381576 -47 26 54.204998496   13.042 11.620     ~ 11 0
23 2MASS J13263680-4730499 RG* 13 26 36.8086971792 -47 30 49.988780352 15.387 13.579 12.109 11.059 10.297 ~ 14 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 ~ 11 0
25 2MASS J13264095-4730372 RG* 13 26 40.9654747992 -47 30 37.289333196   13.559 11.868   10.347 ~ 7 0
26 NGC 5139 166 RB? 13 26 41.0008195968 -47 32 49.841253744   13.965 12.347   10.708 ~ 13 0
27 NGC 5139 9139 RB? 13 26 42.5724537792 -47 30 42.263634348   13.097 11.566     ~ 7 0
28 Cl* NGC 5139 LEID 38149 RB? 13 26 43.0714431576 -47 26 39.244628616   13.370 11.762   10.299 ~ 6 0
29 2MASS J13264360-4729382 LP* 13 26 43.6141039584 -47 29 38.354461656   12.793 11.409     ~ 8 0
30 2MASS J13264432-4729051 LP* 13 26 44.3308972872 -47 29 05.234359812   13.159 11.629     ~ 5 0
31 Cl* NGC 5139 L 1518 RB? 13 26 45.8535422784 -47 26 43.923295356   13.204 11.799   10.329 ~ 5 0
32 NGC 5139 9132 LP* 13 26 46.3606924824 -47 29 30.558581988 17.112 15.104 13.585 11.454 10.361 M2.5 32 0
33 NGC 5139 GlC 13 26 47.28 -47 28 46.1           ~ 3424 0
34 2MASS J13264772-4729288 RG* 13 26 47.7247804296 -47 29 29.060237580 15.503 13.757 11.621 10.603 9.742 ~ 17 0
35 2MASS J13264839-4730104 RG* 13 26 48.4092101328 -47 30 10.459534248 14.64 12.750 11.357   10.098 ~ 9 0
36 NGC 5139 45 RG* 13 26 48.8359913688 -47 24 43.259856336   12.980 11.483     ~ 9 0
37 Cl* NGC 5139 L 2110 RB? 13 26 53.2029817200 -47 27 00.612561852   13.084 11.598     ~ 3 0
38 2MASS J13265353-4731582 RG* 13 26 53.5348359192 -47 31 58.283487660   13.475 11.906   10.472 ~ 9 0
39 2MASS J13265499-4728461 RG* 13 26 55.0028365728 -47 28 46.249051980 15.13 13.260 11.686     ~ 10 0
40 2MASS J13265554-4734234 RG* 13 26 55.5524112504 -47 34 23.415322584 15.133 13.57 11.83 10.945 10.006 K4: 41 0
41 NGC 5139 41 RB? 13 26 56.6371107600 -47 30 40.426332624   13.066 11.583     ~ 8 0
42 2MASS J13265802-4731063 RG* 13 26 58.0282092168 -47 31 06.433683024 14.33 13.150 11.793     ~ 11 0
43 CGCS 6531 RB? 13 26 59.6558979672 -47 28 07.467893580   13.329 11.810   10.298 C-H 7 1
44 Cl* NGC 5139 LEID 25065 RG* 13 27 01.1837057208 -47 20 40.971489720 16.016 13.895 12.451 11.389 10.557 ~ 17 0
45 2MASS J13270243-4731024 RG* 13 27 02.4415569768 -47 31 02.624831472 15.39 13.470 11.877   10.288 ~ 10 0
46 NGC 5139 119 RG* 13 27 03.6767637528 -47 24 38.115848700 14.86 13.420 11.990   10.624 ~ 16 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 05.3000088264 -47 29 05.147920428 16.248 15.044 13.386 12.413 10.061 ~ 13 0
49 2MASS J13270647-4725233 RG* 13 27 06.4770934296 -47 25 23.449429128 14.64 12.960 11.471     ~ 10 0
50 2MASS J13270842-4731493 RG* 13 27 08.4449043144 -47 31 49.250019216 15.359 13.546 11.762 10.825 10.035 ~ 14 0
51 NGC 5139 158 RG* 13 27 10.5476724264 -47 37 00.242395032       11.601 10.339 ~ 21 0
52 2MASS J13271192-4729177 RG* 13 27 11.9367169368 -47 29 17.687861628 15.13 13.370 11.786     ~ 26 0
53 2MASS J13271206-4729449 RG* 13 27 12.0775859232 -47 29 44.922617484 14.89 13.140 11.645     ~ 24 0
54 2MASS J13271582-4727546 RG* 13 27 15.8329639392 -47 27 54.576540468 14.942 13.639 11.938 11.000 10.097 ~ 20 0
55 2MASS J13273772-4725175 LP* 13 27 37.7390620224 -47 25 17.376657456 16.849 14.638 13.103 12.092 10.413 M4 22 0

To bookmark this query, right click on this link: simbad:objects in 2016A&A...585A.111L and select 'bookmark this link' or equivalent in the popup menu