2009AJ....138..547S

Query : 2009AJ....138..547S

2009AJ....138..547S - Astron. J., 138, 547-557 (2009/August-0)

Mass-to-Light ratios for M31 globular clusters: age dating and a surprising metallicity trend.

STRADER J., SMITH G.H., LARSEN S., BRODIE J.P. and HUCHRA J.P.

Abstract (from CDS):

We have obtained velocity dispersions from Keck high-resolution integrated spectroscopy of 10 M31 globular clusters (GCs), including three candidate intermediate-age GCs. We show that these candidates have the same V-band mass-to-light (M/LV) ratios as the other GCs, implying that they are likely to be old. We also find a trend of derived velocity dispersion with wavelength, but cannot distinguish between a systematic error and a physical effect. Our new measurements are combined with photometric and spectroscopic data from the literature in a re-analysis of all M31 GC M/LVvalues. In a combined sample of 27 GCs, we show that the metal-rich GCs have lower M/LVthan the metal-poor GCs, in conflict with predictions from stellar population models. Fragmentary data for other galaxies support this observation. The M31 GC fundamental plane is extremely tight, and we follow up an earlier suggestion by Djorgovski to show that the fundamental plane can be used to estimate accurate distances (potentially 10% or better).

Abstract Copyright: ∼

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

CDS comments: In paragraph 5.2.1 HGHH92-C41 could be [HGH92] G 41, or [[HGH2004] 201.29642-43.05266.

Simbad objects: 40

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Number of rows : 40
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME Mayall II GlC 00 32 46.5323801712 +39 34 40.504803060   14.564 13.807 13.208 12.684 ~ 400 1
2 NAME Mayall III GlC 00 33 33.7890475296 +39 31 18.763470120 16.750 16.482 15.807 15.325   ~ 55 0
3 Bol 289 GlC 00 34 20.8854740376 +41 47 51.121904064 17.000 16.760 16.087 15.613 14.970 ~ 32 0
4 Bol 311 GlC 00 39 33.7263390600 +40 31 14.621665512 16.338 16.209 15.362 14.803 14.39 ~ 82 0
5 Bol 6 GlC 00 40 26.4833924208 +41 27 26.647575012 16.940 16.490 15.74 14.970 14.52 ~ 88 0
6 Bol 12 GlC 00 40 32.4604299648 +41 21 44.200683396 15.990 15.860 15.17 14.620 14.14 ~ 81 0
7 Bol 20 GlC 00 40 55.26 +41 41 25.3 15.980 15.743 14.910 14.367 13.650 ~ 62 0
8 Bol 338 GlC 00 40 58.871 +40 35 47.41 15.123 15.034 14.168 13.621 13.27 ~ 76 0
9 Bol 23 GlC 00 41 01.151 +41 13 45.41 16.040 15.400 14.17 13.560 12.570 ~ 98 0
10 Bol 34 GlC 00 41 28.1192391768 +40 53 49.683810084 16.772 16.372 15.442 14.873 14.220 ~ 65 0
11 Bol 37 GlC 00 41 34.9868411928 +41 14 55.086295416 19.891 18.749 16.849 15.428 14.190 ~ 65 0
12 Bol 45 GlC 00 41 43.1080448904 +41 34 20.102303784 17.059 16.665 15.727 15.140 14.63 ~ 108 0
13 Bol 343 GlC 00 41 43.1127886392 +40 12 22.378121748 17.230 17.080 16.69 15.910 15.42 ~ 72 0
14 Bol 58 GlC 00 41 53.0027897448 +40 47 09.670417656 15.986 15.776 14.967 14.474 14.03 ~ 80 0
15 Bol 126 GlC 00 42 43.6897180488 +41 12 42.775928028 18.059 17.924 17.149 16.662 16.23 ~ 61 0
16 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
17 Bol 158 GlC 00 43 14.3953843272 +41 07 21.141017796 15.900 15.560 14.65 14.150 13.550 ~ 119 1
18 Bol 163 GlC 00 43 17.6311962552 +41 27 44.994405276 16.77 16.030 15.00 14.430 13.87 ~ 80 0
19 Bol 358 GlC 00 43 17.86080 +39 49 13.1808 15.900 15.824 15.168 15.350 14.122 ~ 89 0
20 Bol 171 GlC 00 43 25.6003962624 +41 15 37.095704604 16.795 16.192 15.217 14.635 14.07 ~ 75 0
21 Bol 225 GlC 00 44 29.5618369896 +41 21 35.714596284 15.50 15.000 14.220 13.679 13.02 ~ 136 0
22 Bol 232 GlC 00 44 40.2313035720 +41 15 00.510653016 16.463 16.357 15.586 15.096 14.67 ~ 66 0
23 Bol 240 GlC 00 45 25.0383161496 +41 06 22.112717688 16.030 15.930 15.210 14.730 14.210 ~ 80 0
24 Bol 373 GlC 00 45 41.8461749256 +41 45 33.477770556 16.796 16.378 15.475 14.917 14.46 ~ 62 0
25 Bol 379 GlC 00 45 58.8308321424 +40 42 31.402542528 17.460 17.032 16.183 15.560 14.936 ~ 77 0
26 Bol 384 GlC 00 46 21.9315533736 +40 16 59.645958420 17.370 16.743 15.752 15.260 14.564 ~ 65 0
27 Bol 386 GlC 00 46 27.0143614272 +42 01 52.743069552 16.554 16.355 15.541 14.997 14.435 ~ 93 0
28 Bol 405 GlC 00 49 39.7996917432 +41 35 29.776121412 16.220 15.930 15.195 14.656   ~ 66 0
29 Bol 407 GlC 00 50 09.9648082056 +41 41 01.034928888 17.630 16.953 16.053 15.400 14.830 ~ 59 0
30 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 6226 1
31 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
32 NGC 1316 rG 03 22 41.789 -37 12 29.52 9.81 9.15 8.53 7.66   ~ 1491 1
33 [GMK2001] 114 GlC 03 22 42.4375 -37 12 41.516   19.63 18.46     ~ 23 1
34 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
35 NGC 1978 GlC 05 28 45.330 -66 14 12.04   10.7 10.70     ~ 317 0
36 [VHH81] 41 GlC 13 24 38.9656460520 -43 20 06.486409572 20.20 19.59 18.59 17.94 17.32 ~ 28 0
37 [HGH2004] 201.29642-43.05266 GlC 13 25 11.1423004224 -43 03 09.639856008 20.57 20.32 19.51 18.99 18.48 ~ 17 0
38 NAME Centaurus A BLL 13 25 27.61521044 -43 01 08.8050291   8.18 6.84 6.66   ~ 4774 3
39 NAME Local Group GrG ~ ~           ~ 9325 0
40 [HS80] R12 GlC ~ ~           ~ 3 0

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