2007ApJS..171..101J


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.15CEST06:22:54

2007ApJS..171..101J - Astrophys. J., Suppl. Ser., 171, 101-145 (2007/July-0)

The ACS Virgo cluster survey. XII. The luminosity function of globular clusters in early-type galaxies.

JORDAN A., McLAUGHLIN D.E., COTE P., FERRARESE L., PENG E.W., MEI S., VILLEGAS D., MERRITT D., TONRY J.L. and WEST M.J.

Abstract (from CDS):

We analyze the luminosity function of the globular clusters (GCs) belonging to the early-type galaxies observed in the ACS Virgo Cluster Survey. We have obtained maximum likelihood estimates for a Gaussian representation of the globular cluster luminosity function (GCLF) for 89 galaxies. We have also fit the luminosity functions with an ``evolved Schechter function'', which is meant to reflect the preferential depletion of low-mass GCs, primarily by evaporation due to two-body relaxation, from an initial Schechter mass function similar to that of young massive clusters in local starbursts and mergers. We find a highly significant trend of the GCLF dispersion σ with galaxy luminosity, in the sense that the GC systems in smaller galaxies have narrower luminosity functions. The GCLF dispersions of our Galaxy and M31 are quantitatively in keeping with this trend, and thus the correlation between σ and galaxy luminosity would seem more fundamental than older notions that the GCLF dispersion depends on Hubble type. We show that this narrowing of the GCLF in a Gaussian description is driven by a steepening of the cluster mass function above the classic turnover mass, as one moves to lower luminosity host galaxies. In a Schechter function description, this is reflected by a steady decrease in the value of the exponential cutoff mass scale. We argue that this behavior at the high-mass end of the GC mass function is most likely a consequence of systematic variations of the initial cluster mass function rather than long-term dynamical evolution. The GCLF turnover mass MTO is roughly constant, at MTO≃(2.2±0.4)x105 M in bright galaxies, but it decreases slightly (by ∼35% on average, with significant scatter) in dwarf galaxies with MB,gal≳-18. It could be important to allow for this effect when using the GCLF as a distance indicator. We show that part, although perhaps not all, of the variation could arise from the shorter dynamical friction timescales in less massive galaxies. We probe the variation of the GCLF to projected galactocentric radii of 20-35 kpc in the Virgo giants M49 and M87, finding that the turnover point is essentially constant over these spatial scales. Our fits of evolved Schechter functions imply average dynamical mass losses (Δ) over a Hubble time that vary more than MTO, and systematically but nonmonotonically as a function of galaxy luminosity. If the initial GC mass distributions rose steeply toward low masses as we assume, then these losses fall in the range 2x105 M≲Δ<106 M per GC for all of our galaxies. The trends in Δ are broadly consistent with observed, small variations of the mean GC half-light radius in ACSVCS galaxies, and with rough estimates of the expected scaling of average evaporation rates (galaxy densities) versus total luminosity. We agree with previous suggestions that if the full GCLF is to be understood in more detail, especially alongside other properties of GC systems, the next generation of GCLF models will have to include self-consistent treatments of dynamical evolution inside time-dependent galaxy potentials.

Abstract Copyright:

Journal keyword(s): Galaxies: Elliptical and Lenticular, cD - Galaxies: Star Clusters - Galaxy: Globular Clusters: General

VizieR on-line data: <Available at CDS (J/ApJS/171/101): galaxies.dat table1.dat>

Simbad objects: 91

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Number of rows : 91

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 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 11267 1
2 IC 3019 GiG 12 09 22.257 +13 59 32.73   15.0       ~ 98 0
3 IC 3025 GiG 12 10 23.189 +10 11 18.62   15.3       ~ 72 0
4 IC 3065 GiG 12 15 12.543 +14 25 58.26   14.7       ~ 80 0
5 MCG+02-31-076 GiG 12 16 33.691 +13 01 52.48   15.2       ~ 64 0
6 IC 3101 LSB 12 17 19.666 +11 56 36.96   15.5       ~ 64 0
7 NGC 4262 GiG 12 19 30.582 +14 52 39.78 13.00 12.49 11.55     ~ 333 1
8 NGC 4267 GiG 12 19 45.2726273070 +12 47 53.701823615   12.4       ~ 228 0
9 UGC 7399 A GiG 12 20 48.757 +17 29 14.14   15.1       ~ 85 0
10 UGC 7436 GiP 12 22 19.530 +14 45 38.11   15.2       ~ 118 0
11 2MASX J12224115+0757011 GiG 12 22 41.151 +07 57 01.12   15.3       ~ 52 0
12 NGC 4318 GiG 12 22 43.301 +08 11 54.12   14.1       ~ 122 0
13 NGC 4340 GiP 12 23 35.2775321007 +16 43 20.446578725   12.4       ~ 262 0
14 NGC 4350 GiP 12 23 57.814 +16 41 36.08   11.5 11.08     ~ 299 0
15 NGC 4352 GiG 12 24 05.0219273303 +11 13 05.088363600   14.0       ~ 148 0
16 NGC 4365 GiG 12 24 28.228 +07 19 03.07   11.5       ~ 806 0
17 IC 3292 GiG 12 24 48.369 +18 11 42.28   15.5       ~ 76 0
18 NGC 4371 GiG 12 24 55.430 +11 42 15.44 12.35 11.79 10.81     ~ 293 1
19 M 84 Sy2 12 25 03.74333 +12 53 13.1393 12.67 12.09 10.49     ~ 1665 2
20 NGC 4377 GiG 12 25 12.308 +14 45 43.98   12.5       ~ 205 0
21 NGC 4379 GiG 12 25 14.7451190451 +15 36 26.750240178 13.05 12.63 11.72     ~ 212 1
22 M 85 GiP 12 25 24.053 +18 11 27.89   10.2       ~ 612 0
23 NGC 4387 GiG 12 25 41.6768872639 +12 48 37.809497625 13.42 13.01 12.12   10.87 ~ 374 1
24 IC 3328 GiP 12 25 57.964 +10 03 13.37   14.9       ~ 146 0
25 M 86 GiG 12 26 11.814 +12 56 45.49 10.32 9.83 8.90   7.50 ~ 1022 1
26 NAME Vir I ClG 12 26 32.1 +12 43 24   10.00 8.49     ~ 6010 0
27 NGC 4417 GiP 12 26 50.625 +09 35 02.82   12.2       ~ 243 0
28 NGC 4434 GiG 12 27 36.680 +08 09 15.52   13.2       ~ 237 0
29 NGC 4435 GiG 12 27 40.503 +13 04 44.48 12.23 11.74 10.80     ~ 416 2
30 UGC 7580 GiG 12 27 54.833 +08 05 25.68   15.2 14.72     ~ 66 0
31 NGC 4442 GiG 12 28 03.893 +09 48 13.03   11.2       ~ 265 0
32 IC 3383 GiG 12 28 12.3163075226 +10 17 51.447384346   15.5 15.18     ~ 77 0
33 IC 3381 LSB 12 28 14.854 +11 47 23.69   14.42       ~ 146 1
34 NGC 4452 GiG 12 28 43.2984054035 +11 45 18.204118555 13.27 12.87 11.98     ~ 187 1
35 NGC 4458 GiP 12 28 57.532 +13 14 30.90 13.27 12.93 12.07     ~ 392 2
36 NGC 4459 H2G 12 29 00.026 +13 58 42.89   11.6       ~ 502 0
37 NGC 4464 GiG 12 29 21.313 +08 09 23.63   13.5       ~ 219 0
38 GRDG +12 52 GiC 12 29 23.5153719439 +12 27 02.898413946   16 15.29   14.16 ~ 85 0
39 NGC 4467 GiG 12 29 30.267 +07 59 34.62   15.2       ~ 163 0
40 2MASX J12293498+0803286 G 12 29 34.9891159342 +08 03 28.779877515           ~ 79 0
41 M 49 Sy2 12 29 46.798 +08 00 01.48   13.21 12.17     ~ 1989 2
42 NGC 4473 GiG 12 29 48.878 +13 25 45.55 11.60 11.16 10.20     ~ 612 1
43 NGC 4474 GiG 12 29 53.544 +14 04 07.22   12.6       ~ 248 0
44 NGC 4476 GiG 12 29 59.081 +12 20 55.21 13.28 13.01 12.19     ~ 296 1
45 NGC 4482 GiG 12 30 10.3250399673 +10 46 46.084712572   14.2       ~ 153 0
46 NGC 4478 GiP 12 30 17.439 +12 19 42.88 12.82 12.36 11.45   10.17 ~ 474 1
47 NGC 4479 GiG 12 30 18.343 +13 34 38.88 13.73 13.40 12.44     ~ 169 2
48 UGCA 283 GiG 12 30 31.985 +12 29 24.85   14.5       ~ 389 0
49 NGC 4483 GiG 12 30 40.620 +09 00 56.39   13.4       ~ 149 0
50 M 87 BiC 12 30 49.42338230 +12 23 28.0438581 10.16 9.59 8.63   7.49 ~ 6383 3
51 NGC 4489 GiG 12 30 52.240 +16 45 31.31   13.2       ~ 242 0
52 UGC 7658 GiG 12 30 57.730 +12 16 13.30   11.2       ~ 213 0
53 IC 3442 GiG 12 31 20.1847539251 +14 06 54.716926859   15.4       ~ 93 0
54 IC 3461 GiG 12 32 02.747 +11 53 23.16   15.4 14.88   13.3 ~ 118 0
55 IC 3468 GiG 12 32 14.209 +10 15 05.55   14.6       ~ 124 0
56 IC 3470 GiP 12 32 23.353 +11 15 47.56   15.0       ~ 105 0
57 IC 798 GiG 12 32 33.398 +15 24 55.78   15.3       ~ 90 0
58 NGC 4515 GiG 12 33 04.944 +16 15 55.76   13.3       ~ 135 0
59 IC 3487 GiG 12 33 13.601 +09 23 49.76   15.1       ~ 71 0
60 IC 3490 GiC 12 33 13.902 +10 55 42.73   15.6       ~ 70 0
61 IC 3492 GiC 12 33 19.772 +12 51 12.77   15 15.30     ~ 76 0
62 IC 3501 GiG 12 33 51.606 +13 19 21.35   15.0       ~ 88 0
63 NGC 4526 GiG 12 34 03.029 +07 41 56.90   10.6       ~ 613 1
64 NGC 4528 GiG 12 34 06.006 +11 19 18.90 13.39 12.97 12.06     ~ 173 1
65 IC 3506 GiC 12 34 06.739 +12 44 29.75   16.67 15.93   14.1 ~ 82 0
66 IC 3509 GiG 12 34 11.565 +12 02 55.89   15.3       ~ 102 0
67 NGC 4550 GiP 12 35 30.612 +12 13 15.44 12.97 12.56 11.68     ~ 512 1
68 NGC 4551 GiP 12 35 37.980 +12 15 50.44 13.49 12.97 12.02     ~ 337 1
69 M 89 LIN 12 35 39.8073444 +12 33 22.830809 11.29 10.73 9.75     ~ 941 2
70 LEDA 42046 G 12 36 24.781 +10 23 04.75   16       ~ 71 0
71 NGC 4564 GiG 12 36 26.994 +11 26 21.55 12.51 12.05 11.12     ~ 569 1
72 NGC 4570 GiG 12 36 53.401 +07 14 47.99   11.8       ~ 315 0
73 IC 3586 GiG 12 36 54.858 +12 31 12.49   15.3       ~ 86 0
74 NGC 4578 GiG 12 37 30.546 +09 33 18.44   12.9       ~ 262 0
75 IC 3635 GiG 12 40 13.334 +12 52 29.98   15.5       ~ 72 0
76 MCG+03-32-082 G 12 40 19.651 +15 56 06.97   14.9       ~ 57 0
77 IC 3652 GiG 12 40 58.5600973863 +11 11 04.081313393   15.1       ~ 104 0
78 IC 3653 GiG 12 41 15.721 +11 23 13.85   14.7       ~ 104 0
79 NGC 4612 GiG 12 41 32.758 +07 18 53.21   11.90       ~ 199 1
80 IC 3663 GiC 12 41 39.412 +12 14 50.63   15.65     14.0 ~ 66 0
81 M 59 GiG 12 42 02.322 +11 38 48.95   11.0       ~ 667 0
82 IC 3672 GiG 12 42 08.6669706774 +11 45 15.437359667   15.1       ~ 101 0
83 NGC 4623 GiG 12 42 10.704 +07 40 36.96   13.24       ~ 180 1
84 NGC 4638 GiP 12 42 47.4239000267 +11 26 32.961349655   12.2 11.23     ~ 270 1
85 M 60 GiP 12 43 40.008 +11 33 09.40   10.3       ~ 1270 0
86 NGC 4660 GiP 12 44 31.9848549289 +11 11 25.730688043   12.1       ~ 401 0
87 IC 3735 G 12 45 20.376 +13 41 33.74   15.1       ~ 79 0
88 IC 3773 GiG 12 47 15.264 +10 12 12.40   14.3       ~ 119 0
89 IC 3779 GiG 12 47 20.281 +12 09 59.58   15.5     13.3 ~ 75 0
90 NGC 4754 GiP 12 52 17.563 +11 18 49.18   11.6       ~ 266 0
91 NGC 4762 LIN 12 52 56.049 +11 13 50.88   11.1       ~ 342 0

    Equat.    Gal    SGal    Ecl

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2021.04.15-06:22:54

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