2016ApJ...824...10F

Query : 2016ApJ...824...10F

2016ApJ...824...10F - Astrophys. J., 824, 10-10 (2016/June-2)

The Next Generation Virgo cluster Survey (NGVS). XIII. The luminosity and mass function of galaxies in the core of the Virgo cluster and the contribution from disrupted satellites.

FERRARESE L., COTE P., SANCHEZ-JANSSEN R., ROEDIGER J., McCONNACHIE A.W., DURRELL P.R., MacARTHUR L.A., BLAKESLEE J.P., DUC P.-A., BOISSIER S., BOSELLI A., COURTEAU S., CUILLANDRE J.-C., EMSELLEM E., GWYN S.D.J., GUHATHAKURTA P., JORDAN A., LANCON A., LIU C., MEI S., MIHOS J.C., NAVARRO J.F., PENG E.W., PUZIA T.H., TAYLOR J.E., TOLOBA E. and ZHANG H.

Abstract (from CDS):

We present measurements of the galaxy luminosity and stellar mass function in a 3.71 deg2 (0.3 Mpc2) area in the core of the Virgo Cluster, based on u^* griz data from the Next Generation Virgo Cluster Survey (NGVS). The galaxy sample-which consists of 352 objects brighter than M_ g_=-9.13 mag, the 50% completeness limit of the survey-reaches 2.2 mag deeper than the widely used Virgo Cluster Catalog and at least 1.2 mag deeper than any sample previously used to measure the luminosity function in Virgo. Using a Bayesian analysis, we find a best-fit faint-end slope of α=-1.33±0.02 for the g-band luminosity function; consistent results are found for the stellar mass function and the luminosity function in the other four NGVS bandpasses. We discuss the implications for the faint-end slope of adding 92 ultracompact dwarfs (UCDs)-previously compiled by the NGVS in this region-to the galaxy sample, assuming that UCDs are the stripped remnants of nucleated dwarf galaxies. Under this assumption, the slope of the luminosity function (down to the UCD faint magnitude limit, M_ g_=-9.6 mag) increases dramatically, up to α=-1.60±0.06 when correcting for the expected number of disrupted non-nucleated galaxies. We also calculate the total number of UCDs and globular clusters that may have been deposited in the core of Virgo owing to the disruption of satellites, both nucleated and non-nucleated. We estimate that ∼150 objects with M_ g_ <= -9.6 mag and that are currently classified as globular clusters might, in fact, be the nuclei of disrupted galaxies. We further estimate that as many as 40% of the (mostly blue) globular clusters in the Virgo core might once have belonged to such satellites; these same disrupted satellites might have contributed ∼40% of the total luminosity in galaxies observed in the core region today. Finally, we use an updated Local Group galaxy catalog to provide a new measurement of the luminosity function of Local Group satellites, α=-1.21±0.05, which is only 1.7σ shallower than measured in the core of the Virgo Cluster.

Abstract Copyright: © 2016. The American Astronomical Society. All rights reserved.

Journal keyword(s): galaxies: clusters: individual: Virgo - galaxies: dwarf - galaxies: elliptical and lenticular, cD - galaxies: fundamental parameters - galaxies: luminosity function, mass function

Simbad objects: 50

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Number of rows : 50
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 NAME Wolf-Lundmark-Melotte G 00 01 57.9 -15 27 50   11.50 11.10 10.93   ~ 692 2
2 IC 10 G 00 20 25.50 +59 17 17.0   13.6 9.5     ~ 1119 1
3 NAME Cetus Dwarf Galaxy G 00 26 10.8 -11 03 14     13.2     ~ 236 0
4 NAME Andromeda XXV G 00 30 08.9 +46 51 07     14.8     ~ 113 0
5 NGC 147 GiG 00 33 12.120 +48 30 31.46   12.0 9.5     ~ 687 1
6 NAME Andromeda III G 00 35 33.8 +36 29 52     14.4     ~ 295 0
7 NAME Cassiopeia III G 00 35 59.4 +51 33 35           ~ 54 0
8 NAME Andromeda XXX G 00 36 34.90 +49 38 48.0           ~ 55 0
9 NGC 185 Sy2 00 38 57.9400026024 +48 20 15.035874648   9.10 9.2     ~ 800 1
10 M 110 GiG 00 40 22.0572349992 +41 41 07.507220136   8.92 8.07     ~ 1310 1
11 M 32 GiG 00 42 41.82480 +40 51 54.6120 9.51 9.03 8.08     ~ 2155 2
12 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 12674 1
13 NAME Andromeda I G 00 45 39.8 +38 02 28   13.9 12.7     ~ 342 0
14 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 11175 1
15 NAME Sculptor Dwarf Galaxy G 01 00 09.4 -33 42 32   9.79 8.6 8.81   ~ 1364 4
16 NAME Pisces I G 01 03 56.6 +21 53 41   16.18 14.3     ~ 387 0
17 IC 1613 GiC 01 04 48.4071 +02 07 10.185   10.42 10.01 9.77   ~ 1236 2
18 NAME Andromeda V G 01 10 17.1 +47 37 41     15.3     ~ 207 0
19 NAME Andromeda II G 01 16 29.8 +33 25 09     11.7     ~ 380 0
20 NAME Andromeda XXIII G 01 29 21.8 +38 43 08     14.2     ~ 83 0
21 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 5847 1
22 NAME Phoenix Dwarf Galaxy Sy1 01 51 06.3 -44 26 41   13.48 13.2 12.69   ~ 534 2
23 NAME Fornax Dwarf Spheroidal G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1747 1
24 NAME Andromeda XXXIII G 03 01 23.6 +40 59 18           ~ 37 0
25 NAME NGC 1400 Group GrG 03 32 16.00 -18 33 54.0           ~ 72 0
26 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 17472 0
27 NAME CMa Dwarf Galaxy G 07 12.6 -27 40     -0.1     ~ 199 1
28 NAME M 81-82 Group GrG 09 55 +69.1           ~ 717 0
29 NAME Leo A G 09 59 26.46 +30 44 47.0 14.08 13.54 13.26 13.33   ~ 616 0
30 Z 64-73 G 10 08 28.12 +12 18 23.4   11.3 10.0     ~ 1209 1
31 Z 126-111 G 11 13 28.13 +22 09 10.1   12.9 12.0     ~ 841 0
32 NAME Virgo Cluster ClG 12 26 32.1 +12 43 24           ~ 6659 0
33 UGCA 283 GiG 12 30 31.985 +12 29 24.85   14.5       ~ 413 0
34 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7215 3
35 NAME LOCAL SUPERCL SCG 12 31 +12.4           ~ 520 0
36 2MASS J12315289+1215589 G 12 31 52.8990925992 +12 15 59.041171656           ~ 49 0
37 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 4815 2
38 NAME Cen A Group GrG 13 20 33.9 -44 58 51           ~ 263 0
39 NAME NGC 5846 Group GrG 15 05 47.0 +01 34 25           ~ 153 0
40 NGC 6482 GiG 17 51 48.8339247888 +23 04 18.889271112 12.71 12.35 11.45     ~ 208 1
41 NAME SDG G 18 55 19.0 -30 32 43   4.5 3.6     ~ 2195 2
42 NGC 6822 G 19 44 56.199 -14 47 51.29   18 8.1     ~ 1563 0
43 NAME Aquarius Dwarf G 20 46 51.7 -12 50 54 15.75 15.18 14.83 14.46   ~ 447 1
44 NAME Tuc Galaxy G 22 41 49.6 -64 25 10   15.7 15.2     ~ 302 0
45 NAME Lacerta I G 22 58 16.3 +41 17 28           ~ 47 0
46 NAME Andromeda VII GiG 23 26 31.7 +50 40 33   13.6 11.8     ~ 210 1
47 NAME PegDIG G 23 28 35.2 +14 44 35 13.85 13.16 12.52     ~ 474 1
48 NAME Peg dSph GiG 23 51 46.4 +24 35 11   14.5 13.2     ~ 236 2
49 NAME Andromeda XXI G 23 54 47.7 +42 28 15     14.8     ~ 108 0
50 NAME Local Group GrG ~ ~           ~ 8413 0

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