2020ApJ...900...45L


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.16CEST14:15:45

2020ApJ...900...45L - Astrophys. J., 900, 45-45 (2020/September-1)

Substructure in the globular cluster populations of the Virgo Cluster elliptical galaxies M84 and M86.

LAMBERT R.A., RHODE K.L. and VESPERINI E.

Abstract (from CDS):

We have carried out a search for substructure within the globular cluster (GC) systems of M84 (NGC 4374) and M86 (NGC 4406), two giant elliptical galaxies in the Virgo Cluster. We use wide-field (36' x 36'), multicolor broadband imaging to identify GC candidates in these two galaxies, as well as several other nearby lower-mass galaxies. Our analysis of the spatial locations of the GC candidates reveals several substructures, including a peak in the projected number density of GCs in M86 that is offset from the system center and may be at least partly due to the presence of the dwarf elliptical galaxy NGC 4406B, a bridge that connects the M84 and M86 GC systems, and a boxy isodensity contour along the southeast side of the M86 GC system. We divide our sample into red (metal-rich) and blue (metal-poor) GC candidates to look for differences in the spatial distributions of the two populations and find that the blue cluster candidates are the dominant population in each of the substructures we identify. We also incorporate the measurements from two radial velocity surveys of the GCs in the region and find that the bridge substructure is populated by GCs with a mix of velocities that are consistent with either M86 and M84, possibly providing further evidence for interaction signatures between the two galaxies.

Abstract Copyright: © 2020. The American Astronomical Society. All rights reserved.

Journal keyword(s): Star clusters - Giant elliptical galaxies - Virgo Cluster

Simbad objects: 19

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Number of rows : 19

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 HD 3969 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 11271 1
2 NGC 474 GiP 01 20 06.696 +03 24 54.97 12.75 12.37 11.51 11.42 10.56 ~ 323 1
3 NGC 1399 BiC 03 38 29.083 -35 27 02.67 11.05 9.74 9.59 8.12   ~ 1475 1
4 NGC 4261 LIN 12 19 23.2160630 +05 49 29.700024   13.92 12.87     ~ 1141 0
5 M 84 Sy2 12 25 03.74333 +12 53 13.1393 12.67 12.09 10.49     ~ 1665 2
6 IC 3303 GiG 12 25 15.1981646965 +12 42 52.766956976   15.1 14.24   13.29 ~ 75 0
7 NGC 4387 GiG 12 25 41.6768872639 +12 48 37.809497625 13.42 13.01 12.12   10.87 ~ 374 1
8 NGC 4388 Sy2 12 25 46.820 +12 39 43.45 11.91 11.76 11.02     ~ 1221 2
9 NGC 4397 ** 12 25 58.08 +18 18 03.2           ~ 4 0
10 NGC 4402 GiP 12 26 07.65312 +13 06 47.9376   12.55       M0 366 1
11 M 86 GiG 12 26 11.814 +12 56 45.49 10.32 9.83 8.90   7.50 ~ 1022 1
12 LEDA 40659 GiC 12 26 15.18 +12 57 49.8   16.7 14.32   12.70 ~ 31 0
13 NAME Vir I ClG 12 26 32.1 +12 43 24   10.00 8.49     ~ 6011 0
14 NGC 4425 GiG 12 27 13.3358624164 +12 44 05.189370805 13.12 12.73 11.83     ~ 173 1
15 M 87 BiC 12 30 49.42338230 +12 23 28.0438581 10.16 9.59 8.63   7.49 ~ 6384 3
16 NGC 4837 GiG 12 56 48.3246092614 +48 17 49.007748287   14.4       ~ 18 0
17 ACO 1656 ClG 12 59 48.7 +27 58 50           ~ 4338 2
18 NAME SDG G 18 55 03.1 -30 28 42   4.5 3.6     ~ 1829 2
19 NAME Local Group GrG ~ ~           ~ 7232 0

    Equat.    Gal    SGal    Ecl

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2021.04.16-14:15:45

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