2006A&A...452..875R

Query : 2006A&A...452..875R

2006A&A...452..875R - Astronomy and Astrophysics, volume 452, 875-884 (2006/6-4)

Multivariate analysis of globular cluster horizontal branch morphology: searching for the second parameter.

RECIO-BLANCO A., APARICIO A., PIOTTO G., DE ANGELI F. and DJORGOVSKI S.G.

Abstract (from CDS):

The interpretation of globular cluster horizontal branch (HB) morphology is a classical problem that can significantly blur our understanding of stellar populations. We present a new multivariate analysis connecting the effective temperature extent of the HB with other cluster parameters. The work is based on Hubble Space Telescope photometry of 54 Galactic globular clusters. The present study reveals the important role of the total mass of the globular cluster on its HB morphology. More massive clusters tend to have HBs more extended to higher temperatures. For a set of three input variables including the temperature extension of the HB, [Fe/H] and MV, the first two eigenvectors account for 90% of the total sample variance. Possible effects of cluster self-pollution on HB morphology, stronger in more massive clusters, could explain the results derived here.

Abstract Copyright: ∼

Journal keyword(s): globular clusters: general - stars: horizontal-branch - stars: Population II

Simbad objects: 56

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Number of rows : 56
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     ~ 3914 0
2 NGC 362 GlC 01 03 14.26 -70 50 55.6     6.58     ~ 1084 0
3 NGC 1261 GlC 03 12 16.21 -55 12 58.4     8.63     ~ 520 0
4 NGC 1851 GlC 05 14 06.76 -40 02 47.6           ~ 1429 0
5 M 79 GlC 05 24 10.59 -24 31 27.3     8.16     ~ 816 0
6 NGC 2808 GlC 09 12 03.10 -64 51 48.6           ~ 1419 0
7 NGC 3201 GlC 10 17 36.82 -46 24 44.9           ~ 884 0
8 NGC 4147 GlC 12 10 06.149 +18 32 31.78   11.45 10.74     ~ 572 0
9 NGC 4372 GlC 12 25 45.43 -72 39 32.7   10.86 9.85     ~ 303 0
10 M 68 GlC 12 39 27.98 -26 44 38.6     7.96     ~ 997 0
11 NGC 4833 GlC 12 59 33.92 -70 52 35.4           ~ 425 0
12 M 53 GlC 13 12 55.25 +18 10 05.4     7.79     ~ 836 0
13 NGC 5139 GlC 13 26 47.28 -47 28 46.1           ~ 3425 0
14 NGC 5634 GlC 14 29 37.28 -05 58 35.1   10.69 10.05     ~ 300 0
15 NGC 5694 GlC 14 39 36.52 -26 32 18.0           ~ 301 0
16 NGC 5824 GlC 15 03 58.612 -33 04 06.70   10.28 9.56     ~ 408 0
17 M 5 GlC 15 18 33.22 +02 04 51.7     5.95     ~ 1977 0
18 NGC 5927 GlC 15 28 00.69 -50 40 22.9           ~ 462 0
19 NGC 5946 GlC 15 35 28.58 -50 39 35.0           ~ 194 0
20 NGC 5986 GlC 15 46 03.00 -37 47 11.1     6.92     ~ 374 0
21 M 80 GlC 16 17 02.41 -22 58 33.9           ~ 715 0
22 NGC 6139 GlC 16 27 39.987 -38 50 57.03   11.03 9.68     ~ 214 0
23 M 107 GlC 16 32 31.86 -13 03 13.6           ~ 786 0
24 M 13 GlC 16 41 41.634 +36 27 40.75     5.8     ~ 2191 0
25 NGC 6229 GlC 16 46 58.641 +47 31 36.38   9.38 9.86     ~ 366 0
26 M 12 GlC 16 47 14.18 -01 56 54.7     6.07     ~ 676 0
27 NGC 6235 GlC 16 53 25.36 -22 10 38.8   11.99 7.20     ~ 186 0
28 M 62 GlC 17 01 12.60 -30 06 44.5           ~ 619 0
29 M 19 GlC 17 02 37.69 -26 16 04.6   8.45 5.57     ~ 369 1
30 NGC 6284 GlC 17 04 28.747 -24 45 51.22   10.72 7.43     ~ 278 0
31 NGC 6287 GlC 17 05 09.4906767360 -22 42 28.099250172   11.49 10.30     ~ 224 0
32 NGC 6304 GlC 17 14 32.25 -29 27 43.3           ~ 358 0
33 NGC 6342 GlC 17 21 10.14 -19 35 14.7     10.01     ~ 286 0
34 NGC 6356 GlC 17 23 34.99 -17 48 46.9   10.01 7.42     ~ 350 1
35 NGC 6362 GlC 17 31 54.99 -67 02 54.0           ~ 585 0
36 NGC 6388 GlC 17 36 17.461 -44 44 08.34           ~ 913 1
37 NGC 6397 GlC 17 40 42.09 -53 40 27.6     5.17     ~ 1975 0
38 NGC 6441 GlC 17 50 13.06 -37 03 05.2           ~ 884 0
39 NGC 6544 GlC 18 07 20.58 -24 59 50.4   11.36 9.90     ~ 296 0
40 NGC 6569 GlC 18 13 38.88 -31 49 35.2   10.78 9.47     ~ 238 0
41 NGC 6624 GlC 18 23 40.51 -30 21 39.7           ~ 885 1
42 NGC 6638 GlC 18 30 56.25 -25 29 47.1   10.81 9.68     ~ 234 0
43 M 69 GlC 18 31 23.10 -32 20 53.1           ~ 462 0
44 NGC 6642 GlC 18 31 54.23 -23 28 34.1   11.30 10.24     ~ 206 0
45 NGC 6652 GlC 18 35 45.63 -32 59 26.6           ~ 437 0
46 M 70 GlC 18 43 12.76 -32 17 31.6           ~ 385 0
47 NGC 6717 GlC 18 55 06.04 -22 42 05.3           ~ 244 0
48 NAME SDG G 18 55 19.0 -30 32 43   4.5 3.6     ~ 2186 2
49 NGC 6723 GlC 18 59 33.15 -36 37 56.1           ~ 499 0
50 M 71 GlC 19 53 46.49 +18 46 45.1           ~ 1127 0
51 M 75 GlC 20 06 04.841 -21 55 20.14     8.26     ~ 366 0
52 NGC 6934 GlC 20 34 11.37 +07 24 16.1           ~ 422 0
53 M 72 GlC 20 53 27.70 -12 32 14.3     8.96     ~ 430 0
54 M 15 GlC 21 29 58.33 +12 10 01.2           ~ 3138 0
55 M 2 GlC 21 33 27.02 -00 49 23.7     6.25     ~ 1030 1
56 M 30 GlC 21 40 22.12 -23 10 47.5     7.10     ~ 1048 0

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