2012A&A...546A..31P


C.D.S. - SIMBAD4 rel 1.7 - 2020.05.28CEST15:20:41

2012A&A...546A..31P - Astronomy and Astrophysics, volume 546A, 31-31 (2012/10-1)

The horizontal branch morphology of M 31 globular clusters. Extreme second parameter effect in outer halo clusters.

PERINA S., BELLAZZINI M., BUZZONI A., CACCIARI C., FEDERICI L., FUSI PECCI F. and GALLETI S.

Abstract (from CDS):

We use deep, high quality color magnitude diagrams obtained with the Hubble Space Telescope to compute a simplified version of the Mironov index (SMI; (B)/(B+R)) to parametrize the horizontal branch (HB) morphology for 23 globular clusters in the M 31 galaxy (Sample A), all located in the outer halo at projected distances between 10kpc and 100kpc. This allows us to compare them with their Galactic counterparts, for which we estimated the SMI exactly in the same way, in the SMI vs. [Fe/H] plane. We find that the majority of the considered M 31 clusters lie in a significantly different locus, in this plane, with respect to Galactic clusters lying at any distance from the center of the Milky Way. In particular they have redder HB morphologies at a given metallicity, or, in other words, clusters with the same SMI value are ≃0.4dex more metal rich in the Milky Way than in M 31. We discuss the possible origin of this difference and we conclude that the most likely explanation is that many globular clusters in the outer halo of M 31 formed ≃1-2Gyr later than their counterparts in the outer halo of the Milky Way, while differences in the cluster-to-cluster distribution of He abundance of individual stars may also play a role. The analysis of another sample of 25 bright M 31 clusters (eighteen of them with MV≤-9.0, Sample B), whose SMI estimates are much more uncertain as they are computed on shallow color magnitude diagrams, suggests that extended blue HB tails can be relatively frequent among the most massive M 31 globular clusters, possibly hinting at the presence of multiple populations.

Abstract Copyright:

Journal keyword(s): stars: horizontal-branch - galaxies: star clusters: general - globular clusters: general - ultraviolet: stars - galaxies: stellar content

Status at CDS:  

CDS comments: Table 1 Clusters MCE are M31WFS in Simbad, MCGCN are [MHF2007] GC N.

Simbad objects: 67

goto Full paper

goto View the reference in ADS

Number of rows : 67

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 NAME Mackey-GC1 GlC 00 26 47.7564329300 +39 44 46.117959887     16.05   15.07 ~ 20 1
2 [HTF2008] H4 GlC 00 29 45.01 +41 13 09.6     16.98   16.04 ~ 17 0
3 2MASX J00302731+4136193 GlC 00 30 27.315 +41 36 19.32     16.31   15.36 ~ 21 0
4 [HTF2008] H6 GlC 00 31 09.83 +37 54 00.0     16.28   14.68 ~ 40 0
5 NAME Mayall II GlC 00 32 46.53 +39 34 40.5   14.564 13.807 13.208 12.684 ~ 370 1
6 LEDA 2068390 GlC 00 35 59.7355543286 +35 41 03.598209898     16.09   15.01 ~ 28 0
7 Bol 531 ? 00 36 14.70 +40 57 56.6           ~ 5 0
8 Bol 292 GlC 00 36 16.6769938424 +40 58 26.470646632 17.870 17.891 16.995 16.624 16.060 ~ 38 0
9 RX J0036.3+4053 GlC 00 36 20.86 +40 53 37.1 17.190 17.033 16.35 15.787 15.40 ~ 55 0
10 Bol 298 GlC 00 38 00.25 +40 43 56.0 17.380 17.231 16.590 16.032 15.470 ~ 41 0
11 NAME M31-EC3 GlC 00 38 04.61 +40 44 39.4     17.60   16.58 ~ 16 0
12 NAME M31-EC1 GlC 00 38 19.49 +41 47 14.9     17.60   16.72 ~ 16 0
13 [HTF2008] H14 GlC 00 38 49.41 +42 22 46.9     18.27   17.07 ~ 18 0
14 BA 3-17 GlC 00 39 33.72 +40 31 14.7 16.550 16.410 15.56 14.940 14.39 ~ 77 0
15 Bol 6 GlC 00 40 26.4828316304 +41 27 26.653846594 16.940 16.490 15.74 14.970 14.52 ~ 82 0
16 Bol 8 GlC 00 40 30.27 +41 16 08.7 18.160 17.660 16.560 16.210 15.510 ~ 41 0
17 Bol 10 GlC 00 40 31.57 +41 14 22.4 17.650 17.500 16.660 16.120 15.480 ~ 45 0
18 Bol 12 GlC 00 40 32.4598109034 +41 21 44.200706344 15.990 15.860 15.17 14.620 14.14 ~ 75 0
19 Bol 336 GlC 00 40 47.61 +42 08 42.1 18.790 18.521 17.811 17.403 16.950 ~ 28 0
20 Bol 337 GlC 00 40 48.48 +42 12 10.9 17.690 17.522 16.733 16.242 15.630 ~ 39 0
21 Bol 338 GlC 00 40 58.871 +40 35 47.41 15.189 15.060 14.259 13.754 13.27 ~ 71 0
22 [MLV92] 237751 GlC 00 41 01.151 +41 13 45.41 16.040 15.400 14.17 13.560 12.570 ~ 79 0
23 Bol 27 GlC 00 41 14.524 +40 55 51.19 16.689 16.520 15.61 15.157 14.55 ~ 62 0
24 Bol 343 GlC 00 41 43.1011408698 +40 12 22.414305198 17.230 17.080 16.69 15.910 15.42 ~ 69 0
25 [FMZ2005] 7 GlC 00 41 43.11 +41 34 20.1 17.090 16.720 15.9 15.190 14.63 ~ 97 0
26 2MASS J00415300+4047096 GlC 00 41 53.0057629599 +40 47 09.637051361 16.050 15.810 15.00 14.480 14.03 ~ 74 0
27 Bol 88 GlC 00 42 21.06 +41 32 14.2 16.870 16.540 15.40 14.730 13.950 ~ 50 0
28 Bol 350 GlC 00 42 28.43 +40 24 51.2 17.470 17.360 16.740 16.200 15.640 ~ 40 1
29 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 10850 1
30 NAME M31-EC2 GlC 00 42 55.00 +43 57 28.0     17.10   16.17 ~ 19 0
31 Bol 468 GlC 00 43 12.55 +39 47 57.3 18.490 18.490 17.788 17.200 16.626 ~ 35 0
32 Bol 158 GlC 00 43 14.41 +41 07 21.3 15.900 15.560 14.65 14.150 13.550 ~ 113 1
33 NAME Mayall IV GlC 00 43 17.85 +39 49 13.2 15.900 15.710 15.219 14.639 14.122 ~ 82 0
34 [JSD2015] AP 253 GlC 00 44 19.4549832912 +41 30 34.664513446 17.48 17.330 16.51 16.100 15.73 ~ 45 0
35 BA 3-1 GlC 00 44 27.09 +41 28 49.8 16.24 16.240 15.31 14.890 14.57 ~ 52 0
36 2E 166 GlC 00 44 29.5614604627 +41 21 35.695495111 15.50 15.000 14.220 13.679 13.02 ~ 124 0
37 Bol 233 GlC 00 44 42.12 +41 43 54.5 16.80 16.610 15.83 15.270 14.83 ~ 47 0
38 BA 3-24 GlC 00 44 46.68 +42 03 50.4 17.060 16.800 16.48 15.550 14.980 ~ 40 0
39 Bol D255 GlC 00 44 48.56 +42 06 13.3     18.97     ~ 14 0
40 Bol 240 GlC 00 45 25.0383976564 +41 06 22.131507926 16.030 15.930 15.210 14.730 14.210 ~ 76 0
41 Bol 379 GlC 00 45 58.8309005030 +40 42 31.400600234 17.460 17.032 16.183 15.560 14.936 ~ 74 0
42 Bol 384 GlC 00 46 21.9300523115 +40 16 59.647551658 17.370 16.743 15.752 15.260 14.564 ~ 62 0
43 BA 3-8 GlC 00 46 27.0149288668 +42 01 52.715208783 16.66 16.450 15.69 14.750 14.58 ~ 85 0
44 Bol 405 GlC 00 49 39.80 +41 35 29.8 16.220 15.930 15.195 14.656   ~ 61 0
45 NAME Mayall V GlC 00 50 09.9648440835 +41 41 01.045117023 17.630 16.953 16.053 15.400 14.830 ~ 55 0
46 [HTF2008] H23 GlC 00 54 24.9625587034 +39 42 55.532937875     16.72   15.68 ~ 21 0
47 [HTF2008] H24 GlC 00 55 43.94 +42 46 16.1     17.78   16.71 ~ 19 0
48 NAME M31-EC4 GlC 00 58 15.42 +38 03 02.0     18.84   17.77 ~ 26 0
49 [HTF2008] H27 GlC 01 07 26.30 +35 46 46.5     16.50   15.59 ~ 24 0
50 NGC 1851 GlC 05 14 06.76 -40 02 47.6   8.80 7.23     ~ 1238 0
51 NGC 2419 GlC 07 38 08.51 +38 52 54.9     10.05     ~ 808 0
52 IRAS 09110-6439 GlC 09 12 03.10 -64 51 48.6   7.77 5.69     ~ 1237 0
53 M 87 BiC 12 30 49.42338230 +12 23 28.0438581 10.16 9.59 8.63   7.49 ~ 6167 3
54 M 68 GlC 12 39 27.98 -26 44 38.6   10.26 7.96     ~ 872 0
55 NGC 5139 GlC 13 26 47.28 -47 28 46.1   6.12 5.33     ~ 2987 0
56 NGC 5466 GlC 14 05 27.29 +28 32 04.0   10.5 9.70     ~ 715 0
57 NGC 6229 GlC 16 46 58.641 +47 31 36.38   9.38 9.86     ~ 311 0
58 M 92 GlC 17 17 07.39 +43 08 09.4     6.52     ~ 1896 0
59 NGC 6388 GlC 17 36 17.461 -44 44 08.34   7.40       ~ 798 1
60 NGC 6405 OpC 17 40 20 -32 15.2           ~ 168 0
61 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11444 0
62 NGC 6441 GlC 17 50 13.06 -37 03 05.2   9.26 8.00     ~ 763 0
63 NGC 6475 OpC 17 53 51 -34 47.6           ~ 337 0
64 NGC 6584 GlC 18 18 37.60 -52 12 56.8   10.32 8.17     ~ 242 0
65 M 54 GlC 18 55 03.33 -30 28 47.5           ~ 888 0
66 M 15 GlC 21 29 58.33 +12 10 01.2   3       ~ 2894 0
67 M 30 GlC 21 40 22.12 -23 10 47.5     7.10     ~ 908 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2012A&A...546A..31P and select 'bookmark this link' or equivalent in the popup menu


2020.05.28-15:20:41

© Université de Strasbourg/CNRS

    • Contact