2013A&A...549A..60C


C.D.S. - SIMBAD4 rel 1.7 - 2021.01.27CET18:24:32

2013A&A...549A..60C - Astronomy and Astrophysics, volume 549A, 60-60 (2013/1-1)

Full spectral fitting of Milky Way and M 31 globular clusters: ages and metallicities.

CEZARIO E., COELHO P.R.T., ALVES-BRITO A., FORBES D.A. and BRODIE J.P.

Abstract (from CDS):

The formation and evolution of disk galaxies are long standing questions in astronomy. Understanding the properties of globular cluster systems can lead to important insights on the evolution of its host galaxy. We aim to obtain the stellar population parameters - age and metallicity - of a sample of M31 and Galactic globular clusters. Studying their globular cluster systems is an important step towards understanding their formation and evolution in a complete way. Our analysis employs a modern pixel-to-pixel spectral fitting technique to fit observed integrated spectra to updated stellar population models. By comparing observations to models we obtain the ages and metallicities of their stellar populations. We apply this technique to a sample of 38 globular clusters in M31 and to 41 Galactic globular clusters, used as a control sample. Our sample of M31 globular clusters spans ages from 150Myr to the age of the Universe. Metallicities [Fe/H] range from -2.2dex to the solar value. The age-metallicity relation obtained can be described as having two components: an old population with a flat age-[Fe/H] relation, possibly associated with the halo and/or bulge, and a second one with a roughly linear relation between age and metallicity, higher metallicities corresponding to younger ages, possibly associated with the M31 disk. While we recover the very well known Galactic GC metallicity bimodality, our own analysis of M31's metallicity distribution function (MDF) suggests that both GC systems cover basically the same [Fe/H] range yet M31's MDF is not clearly bimodal. These results suggest that both galaxies experienced different star formation and accretion histories.

Abstract Copyright:

Journal keyword(s): globular clusters: general - galaxies: star clusters: individual: M31

VizieR on-line data: <Available at CDS (J/A+A/549/A60): table1.dat table3.dat>

Simbad objects: 84

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Number of rows : 84

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NGC 104 GlC 00 24 05.359 -72 04 53.20   5.78 4.09     ~ 3604 0
2 LEDA 2068390 GlC 00 35 59.7355543286 +35 41 03.598209898     16.09   15.01 ~ 28 0
3 Bol 292 GlC 00 36 16.6769938424 +40 58 26.470646632 17.870 17.891 16.995 16.624 16.060 ~ 38 0
4 BA 3-15 GlC 00 38 21.60 +40 03 37.0 18.193 17.920 17.023 16.494 15.890 ~ 41 0
5 Bol 302 GlC 00 38 33.51 +41 20 52.4 17.580 17.462 16.680 16.182 15.770 ~ 26 0
6 Bol 304 GlC 00 38 56.94 +41 10 28.4 17.780 17.537 16.826 16.319 15.740 ~ 32 0
7 Bol 305 GlC 00 38 58.85 +40 16 32.1 18.781 18.546 17.770 17.299 16.717 ~ 26 1
8 Bol 307 GlC 00 39 18.45 +40 32 58.1 18.408 18.178 17.428 16.926 16.274 ~ 31 0
9 Bol 310 GlC 00 39 25.74 +41 23 33.2 18.030 17.802 17.040 16.543 15.980 ~ 28 0
10 Bol 314 GlC 00 39 44.59 +40 14 07.9 18.456 18.341 17.770 17.405 16.942 ~ 29 1
11 2MASX J00394456+4052554 GlC 00 39 44.6036458790 +40 52 54.997146652 17.643 17.384 16.327 15.609 14.896 ~ 35 0
12 Bol 316 GlC 00 39 53.59 +40 41 39.0 17.695 17.553 16.710 16.205 15.668 ~ 29 1
13 Bol 321 GlC 00 40 15.38 +40 27 45.9 17.913 18.068 17.615 17.316 16.834 ~ 28 1
14 [NVK2008] KW022 GlC 00 40 17.266 +40 39 04.95 17.589 18.032 17.789 17.657 17.394 ~ 33 1
15 Bol 324 GlC 00 40 20.47 +41 40 49.3 18.640 17.850 18.446   17.633 ~ 40 1
16 [NVK2008] KW048 GlC 00 40 24.101 +40 36 22.64 16.55 16.90 16.58 16.31 16.00 ~ 47 1
17 Bol 328 GlC 00 40 24.57 +41 40 22.4 19.230 18.750 17.861   16.918 ~ 44 0
18 Bol 331 GlC 00 40 26.15 +41 42 04.2   18.440 18.191   17.076 ~ 33 0
19 Bol 337 GlC 00 40 48.48 +42 12 10.9 17.690 17.522 16.733 16.242 15.630 ~ 39 0
20 Bol 347 GlC 00 42 22.8907444306 +41 54 27.448075805 17.380 17.230 16.500 15.970 15.490 ~ 34 0
21 Bol 350 GlC 00 42 28.43 +40 24 51.2 17.470 17.360 16.740 16.200 15.640 ~ 40 1
22 [JSD2015] AP 2992 GlC 00 42 33.1047736040 +41 20 16.858221990 20.67 18.210 18.47 16.740 16.89 ~ 32 0
23 M 32 IG 00 42 41.825 +40 51 54.61 9.51 9.03 8.08     ~ 2030 2
24 [JSD2015] AP 1268 GlC 00 42 43.6895631156 +41 12 42.772488757 18.059 17.924 17.149 16.662 16.23 ~ 57 0
25 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 11159 1
26 [JSD2015] AP 6039 GlC 00 42 44.7721873754 +41 14 44.136337893 18.366 18.089 17.200   17.01 ~ 26 0
27 Bol 354 GlC 00 42 47.5210574909 +42 00 25.849799012 18.630 17.940 17.810 17.190 16.740 ~ 27 0
28 [JSD2015] AP 1642 GlC 00 42 51.6417620954 +41 14 03.610444859 17.73 17.582 16.699 16.161 15.736 ~ 49 0
29 Bol 158 GlC 00 43 14.406 +41 07 21.28 15.900 15.560 14.65 14.150 13.550 ~ 113 1
30 [JSD2015] AP 2564 GlC 00 43 17.6290874889 +41 27 45.012855603 16.77 16.030 15.00 14.430 13.87 ~ 75 0
31 Bol 222 GlC 00 44 25.35 +41 14 11.9 18.683 18.385 17.686 17.235 16.749 ~ 42 1
32 2E 166 GlC 00 44 29.560 +41 21 35.72 15.50 15.000 14.220 13.679 13.02 ~ 126 0
33 BA 3-27 GlC 00 44 36.4446453548 +42 17 20.404209005 17.436 17.326 16.569 16.077 15.433 ~ 38 0
34 [JSD2015] AP 859 GlC 00 44 46.3840927679 +41 29 17.732884128 18.002 17.615 16.738 16.159 15.561 ~ 48 0
35 [JSD2015] AP 226 GlC 00 46 06.2106491840 +42 00 53.127933100 17.461 17.282 16.829 16.573 16.114 ~ 32 1
36 Bol 383 GlC 00 46 11.95 +41 19 41.6 17.230 16.166 15.332 14.873 14.430 ~ 39 0
37 2MASX J00470122+4124067 GlC 00 47 01.225 +41 24 06.77 17.970 17.719 16.930 16.400 16.000 ~ 29 0
38 Bol 398 GlC 00 47 57.78 +41 48 45.5 18.890 18.377 17.462 16.675 15.910 ~ 27 0
39 Bol 401 GlC 00 48 08.51 +41 40 41.9 17.830 17.515 16.826 16.503 15.680 ~ 34 0
40 NAME Martin-GC1 GlC 00 50 42.45 +32 54 58.7     15.50     ~ 46 1
41 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9661 1
42 [HTF2008] H27 GlC 01 07 26.30 +35 46 46.5     16.50   15.59 ~ 24 0
43 NGC 1851 GlC 05 14 06.76 -40 02 47.6   8.80 7.23     ~ 1262 0
44 M 79 GlC 05 24 10.59 -24 31 27.3   9.21 8.16     ~ 727 0
45 NGC 2298 GlC 06 48 59.41 -36 00 19.1   10.77 8.89     ~ 435 0
46 NGC 2808 GlC 09 12 03.10 -64 51 48.6   7.77 5.69     ~ 1270 0
47 NGC 3201 GlC 10 17 36.82 -46 24 44.9   9.18 8.24     ~ 742 0
48 NGC 5286 GlC 13 46 26.81 -51 22 27.3   9.18 8.31     ~ 372 0
49 M 5 GlC 15 18 33.22 +02 04 51.7   7.34 5.95     ~ 1797 0
50 NGC 5927 GlC 15 28 00.69 -50 40 22.9   10.13 8.86     ~ 410 0
51 NGC 5946 GlC 15 35 28.58 -50 39 35.0   11.98 10.72     ~ 168 0
52 NGC 5986 GlC 15 46 03.00 -37 47 11.1     6.92     ~ 312 0
53 M 4 GlC 16 23 35.22 -26 31 32.7           ~ 1698 0
54 M 107 GlC 16 32 31.86 -13 03 13.6   9.96 8.85     ~ 716 0
55 M 12 GlC 16 47 14.18 -01 56 54.7   8.52 6.07     ~ 586 0
56 NGC 6235 GlC 16 53 25.36 -22 10 38.8   11.99 7.20     ~ 162 0
57 M 10 GlC 16 57 09.05 -04 06 01.1     4.98     ~ 699 0
58 M 62 GlC 17 01 12.60 -30 06 44.5   8.55 7.39     ~ 525 0
59 NGC 6284 GlC 17 04 28.747 -24 45 51.22   10.72 7.43     ~ 241 0
60 NGC 6304 GlC 17 14 32.25 -29 27 43.3   10.33 9.03     ~ 304 0
61 NGC 6316 GlC 17 16 37.42 -28 08 24.0   10.33 9.03     ~ 179 0
62 M 9 GlC 17 19 11.78 -18 30 58.5   9.36 8.42     ~ 282 0
63 NGC 6342 GlC 17 21 10.14 -19 35 14.7   11.25 10.01     ~ 249 0
64 NGC 6356 GlC 17 23 34.99 -17 48 46.9   10.01 7.42     ~ 322 1
65 NGC 6352 GlC 17 25 29.11 -48 25 19.8   9.95 8.87     ~ 344 0
66 NGC 6362 GlC 17 31 54.99 -67 02 54.0   9.72 8.86     ~ 499 0
67 NGC 6388 GlC 17 36 17.461 -44 44 08.34   7.40       ~ 818 1
68 NGC 6441 GlC 17 50 13.06 -37 03 05.2   9.26 8.00     ~ 779 0
69 NGC 6522 GlC 18 03 34.08 -30 02 02.3   10.68 9.48     ~ 466 1
70 NGC 6528 GlC 18 04 49.61 -30 03 20.8   12.12 10.65     ~ 472 0
71 NGC 6544 GlC 18 07 20.58 -24 59 50.4   11.36 9.90     ~ 243 0
72 NGC 6553 GlC 18 09 15.68 -25 54 27.9   9.08       ~ 542 0
73 NGC 6569 GlC 18 13 38.88 -31 49 35.2   10.78 9.47     ~ 192 0
74 NGC 6624 GlC 18 23 40.51 -30 21 39.7           ~ 787 1
75 M 28 GlC 18 24 32.89 -24 52 11.4           ~ 675 0
76 NGC 6638 GlC 18 30 56.25 -25 29 47.1   10.81 9.68     ~ 197 0
77 M 69 GlC 18 31 23.10 -32 20 53.1   9.32 8.31     ~ 412 1
78 NGC 6652 GlC 18 35 45.63 -32 59 26.6   10.64 9.75     ~ 359 0
79 NGC 6723 GlC 18 59 33.15 -36 37 56.1           ~ 438 0
80 NGC 6752 GlC 19 10 52.11 -59 59 04.4   6.96 6.28     ~ 1829 0
81 M 15 GlC 21 29 58.33 +12 10 01.2   3       ~ 2933 0
82 M 2 GlC 21 33 27.02 -00 49 23.7     6.25     ~ 913 1
83 NAME Galactic Bulge reg ~ ~           ~ 3518 0
84 NAME Local Group GrG ~ ~           ~ 7145 0

    Equat.    Gal    SGal    Ecl

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2021.01.27-18:24:32

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