2012ApJ...757..184P

Query : 2012ApJ...757..184P

2012ApJ...757..184P - Astrophys. J., 757, 184 (2012/October-1)

Subaru spectroscopy of the globular clusters in the Virgo giant elliptical galaxy M86.

PARK H.S., LEE M.G. and HWANG H.S.

Abstract (from CDS):

We present the first spectroscopic study of the globular clusters (GCs) in the giant elliptical galaxy (gE) M86 in the Virgo Cluster. Using spectra obtained in the Multi-Object Spectroscopy mode of the Faint Object Camera and Spectrograph on the Subaru telescope, we measure the radial velocities for 25 GCs in M86. The mean velocity of the GCs is derived to be  = -35481^79 km/s, which is different from the velocity of the M86 nucleus (vgal= -234 ± 41 km/s). We estimate the velocity dispersion of the GCs, σp = 292+32_- 32_ km/s, and find a hint of rotation in the M86 GC system. A comparison of the observed velocity dispersion profiles of the GCs and stars with a prediction based on the stellar mass profile strongly suggests the existence of an extended dark matter halo in M86. We also estimate the metallicities and ages for 16 and 8 GCs, respectively. The metallicities of M86 GCs are in the range of -2.0 < [Fe/H] ←0.2 with a mean value of -1.13 ±0.47. These GCs show a wide age distribution from 4 to 15 Gyr.

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Journal keyword(s): galaxies: abundances - galaxies: elliptical and lenticular, cD - galaxies: individual (M86, NGC 4406) - galaxies: kinematics and dynamics - galaxies: star clusters: general

Nomenclature: Table 3: [PLH2012] NNN N=28 among (Nos 58-448)

Simbad objects: 46

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Number of rows : 46
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 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
2 NGC 1399 rG 03 38 29.083 -35 27 02.67 11.05 9.74 9.59 8.12   ~ 1636 1
3 NGC 1407 rG 03 40 11.904 -18 34 49.36   10.64 9.67 9.13   ~ 613 2
4 [PLH2012] 226 * 12 25 44.08 +12 59 40.6           ~ 1 0
5 LEDA 40574 GiC 12 25 44.6358557064 +13 01 19.566013188   17.53 16.81   15.48 ~ 33 0
6 NGVS J122544.68+130011.3 GlC 12 25 44.6756497920 +13 00 11.328182424           ~ 2 0
7 [PLH2012] 251 GlC 12 25 46.82 +12 57 46.1           ~ 1 0
8 [PLH2012] 302 GlC 12 25 48.78 +12 58 22.6           ~ 1 0
9 [PLH2012] 96 GlC 12 25 49.1498483064 +12 58 09.188762268           ~ 1 0
10 [PLH2012] 58 GlC 12 25 49.9424131807 +13 00 48.223811339           ~ 1 0
11 [PLH2012] 352 GlC 12 25 52.11 +12 56 52.7           ~ 1 0
12 [PLH2012] 142 GlC 12 25 58.9756257960 +12 59 45.920333616           ~ 1 0
13 [PLH2012] 258 GlC 12 25 59.27 +13 00 19.8           ~ 1 0
14 [PLH2012] 265 GlC 12 25 59.94 +12 56 27.6           ~ 2 0
15 [PLH2012] 150 GlC 12 26 00.1201075656 +12 57 39.045816324           ~ 1 0
16 [PLH2012] 149 GlC 12 26 00.32 +12 58 01.6           ~ 1 0
17 [PLH2012] 289 GlC 12 26 02.72 +12 54 49.3           ~ 1 0
18 [JPB2009] 186.5158843+12.9550088 GlC 12 26 03.79 +12 57 18.1           ~ 2 0
19 [PLH2012] 446 C?G 12 26 04.79 +12 54 10.2           ~ 1 0
20 [JPB2009] 186.5231681+12.9601976 GlC 12 26 05.54 +12 57 36.8           ~ 2 0
21 [JPB2009] 186.5254567+12.9317390 GlC 12 26 06.09 +12 55 54.4           ~ 2 0
22 [PLH2012] 332 GlC 12 26 06.58 +12 54 31.5           ~ 1 0
23 [PLH2012] 81 * 12 26 07.2938569896 +12 55 21.199941732           ~ 1 0
24 [JPB2009] 186.5314807+12.9770597 GlC 12 26 07.53 +12 58 37.6           ~ 2 0
25 [JPB2009] 186.5319102+12.9695107 GlC 12 26 07.63 +12 58 10.4           ~ 2 0
26 [PLH2012] 143 GlC 12 26 08.6874081936 +12 53 50.480051172           ~ 1 0
27 M 86 GiG 12 26 11.814 +12 56 45.49 10.32 9.83 8.90   7.50 ~ 1126 1
28 [JPB2009] 186.5578797+12.9659625 GlC 12 26 13.8735473616 +12 57 57.775761036           ~ 2 0
29 [PLH2012] 430 GlC 12 26 14.59 +12 56 55.3           ~ 2 0
30 [PLH2012] 77 GlC 12 26 14.7334865177 +12 53 35.144557012           ~ 1 0
31 NGC 4406B GiC 12 26 15.18 +12 57 49.8   16.7 14.32   12.70 ~ 38 0
32 [JPB2009] 186.5665109+12.9521605 GlC 12 26 15.9463564560 +12 57 08.052690924           ~ 2 0
33 [PLH2012] 299 GlC 12 26 17.86 +12 54 11.4           ~ 2 0
34 [PLH2012] 413 GlC 12 26 23.40 +12 55 18.5           ~ 1 0
35 M 49 Sy2 12 29 46.8 +08 00 01   13.21 12.17     ~ 2174 2
36 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
37 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7815 3
38 NGC 4636 LIN 12 42 49.8333280080 +02 41 15.951929028   12.62 11.84     ~ 1156 1
39 M 60 GiC 12 43 39.9708251934 +11 33 09.688174067   10.3       ~ 1395 1
40 NAME Centaurus A BLL 13 25 27.61521044 -43 01 08.8050291   8.18 6.84 6.66   ~ 4774 3
41 M 5 GlC 15 18 33.22 +02 04 51.7     5.95     ~ 2095 0
42 BD+33 2642 pA* 15 51 59.8854348048 +32 56 54.329485272 9.806 10.61 10.73 10.884 10.961 O7p 456 0
43 M 107 GlC 16 32 31.86 -13 03 13.6           ~ 835 0
44 M 13 GlC 16 41 41.634 +36 27 40.75     5.8     ~ 2291 0
45 M 92 GlC 17 17 07.39 +43 08 09.4     6.52     ~ 2240 0
46 NGC 6624 GlC 18 23 40.51 -30 21 39.7           ~ 939 1

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