2015ApJ...802...30Z


Query : 2015ApJ...802...30Z

2015ApJ...802...30Z - Astrophys. J., 802, 30 (2015/March-3)

The next generation Virgo cluster survey. VI. The kinematics of ultra-compact dwarfs and globular clusters in M87.

ZHANG H.-X., PENG E.W., COTE P., LIU C., FERRARESE L., CUILLANDRE J.-C., CALDWELL N., GWYN S.D.J., JORDAN A., LANCON A., LI B., MUNOZ R.P., PUZIA T.H., BEKKI K., BLAKESLEE J.P., BOSELLI A., DRINKWATER M.J., DUC P.-A., DURRELL P., EMSELLEM E., FIRTH P. and SANCHEZ-JANSSEN R.

Abstract (from CDS):

The origin of ultra-compact dwarfs (UCDs; rh ≳ 10 pc)–objects larger and more massive than typical globular clusters (GCs), but more compact than typical dwarf galaxies–has been hotly debated in the 15 years since their discovery. Even whether UCDs should be considered galactic in origin, or simply the most extreme star clusters, is not yet settled. We present the dynamical properties of 97 spectroscopically confirmed UCDs and 911 GCs associated with the central cD galaxy of the Virgo cluster, M87. Our UCDs, of which 89% have M{sstarf} ≳ 2x 106 M and 92% are as blue as the classic blue GCs, nearly triple the confirmed sample of Virgo UCDs, providing by far the best opportunity for studying global dynamics of a UCD system. We found that (1) UCDs have a surface number density profile that is shallower than that of blue GCs in the inner ∼70 kpc and as steep as that of red GCs at larger radii; (2) UCDs exhibit a significantly stronger rotation than GCs, and blue GCs seem to have a velocity field that is more consistent with that of the surrounding dwarf ellipticals than with that of UCDs; (3) UCDs have an orbital anisotropy profile that is tangentially biased at radii ≲ 40 kpc and radially biased farther out, whereas blue GCs become more tangentially biased at larger radii beyond ∼40 kpc; (4) GCs with M{sstarf} ≳ 2x106 M have rotational properties indistinguishable from the less massive ones, suggesting that it is the size, instead of mass, that differentiates UCDs from GCs as kinematically distinct populations. We conclude that most UCDs in M87 are not consistent with being merely the most luminous and extended examples of otherwise normal GCs. The radially biased orbital structure of UCDs at large radii is in general agreement with the "tidally threshed dwarf galaxy" scenario.

Abstract Copyright:

Journal keyword(s): galaxies: clusters: individual: Virgo - galaxies: dwarf - galaxies: elliptical and lenticular, cD - galaxies: halos - galaxies: star clusters: general - globular clusters: general

VizieR on-line data: <Available at CDS (J/ApJ/802/30): table1.dat>

Nomenclature: Table 1: [ZPC2015] M87UCD NN (Nos 1-39).

Simbad objects: 124

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Number of rows : 124
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 32 IG 00 42 41.825 +40 51 54.61 9.51 9.03 8.08     ~ 2044 2
2 W 3 MoC 02 27 04.10 +61 52 27.1           ~ 980 3
3 NGC 1132 GiG 02 52 51.82 -01 16 29.0   13.9   12.16   ~ 150 0
4 HCG 22 CGG 03 03 31 -15 40.5           ~ 68 0
5 ACO 426 ClG 03 19 47.2 +41 30 47           ~ 2026 1
6 3C 84 Sy2 03 19 48.1597607660 +41 30 42.114155434   13.10 12.48 11.09   ~ 3664 3
7 ACO S 373 ClG 03 38 30 -35 27.3           ~ 1626 0
8 2MASS J03385407-3533331 GiC 03 38 54.0548295896 -35 33 33.352307509   18.5 18.06     ~ 69 0
9 NAME HYA SUPERCL SCG 08 57.9 +03 10           ~ 156 0
10 NAME Hydra I Cluster ClG 10 36 36.0 -27 31 04           ~ 786 1
11 ACO 1367 ClG 11 44 44.6 +19 41 59           ~ 1015 1
12 M 86 GiG 12 26 11.814 +12 56 45.49 10.32 9.83 8.90   7.50 ~ 1026 1
13 NAME Vir I ClG 12 26 32.1 +12 43 24   10.00 8.49     ~ 6076 0
14 [KHL2017b] GC154 GlC 12 28 06.62 +12 24 36.4           ~ 3 0
15 NGVS J122837.21+122845.6 G 12 28 37.21 +12 28 45.6           ~ 4 0
16 NGVS J122910.66+124304.1 G 12 29 10.6677528737 +12 43 04.183394603           ~ 3 0
17 NGVS J122914.87+115343.8 G 12 29 14.8597706033 +11 53 43.921424253           ~ 4 0
18 NGVS J122940.39+122728.1 G 12 29 40.39 +12 27 28.1           ~ 3 0
19 NGVS J122941.32+123952.4 G 12 29 41.3184856822 +12 39 52.449323407           ~ 3 0
20 NGVS J122941.56+124427.6 G 12 29 41.5535000358 +12 44 27.579821518           ~ 4 0
21 NGVS J122945.26+125100.9 G 12 29 45.2535579905 +12 51 00.833535774           ~ 4 0
22 M 49 Sy2 12 29 46.798 +08 00 01.48   13.21 12.17     ~ 1993 2
23 NGVS J122952.28+123737.8 GiC 12 29 52.2726094963 +12 37 37.752906343   19.51       ~ 7 0
24 LEDA 41245 G 12 29 56.3278381582 +13 13 12.244968603     17.85   17.32 ~ 13 0
25 [HJC2005] 1250-1 G 12 29 56.6444146323 +12 19 31.331608031           ~ 8 0
26 NGVS J122957.12+123602.9 GlC 12 29 57.12 +12 36 02.9           ~ 5 0
27 NGVS J123001.95+124226.9 G 12 30 01.95 +12 42 26.9           ~ 3 0
28 NGVS J123002.46+123633.8 G 12 30 02.46 +12 36 33.8           ~ 3 0
29 NGVS J123004.05+120714.0 GlC 12 30 04.0495398912 +12 07 13.968558701           ~ 6 0
30 NGVS J123006.06+123954.0 G 12 30 06.0545463689 +12 39 53.984240101           ~ 3 0
31 NGVS J123006.13+122435.3 G 12 30 06.13 +12 24 35.4           ~ 3 0
32 NGVS J123007.57+123631.0 GlC 12 30 07.5690843498 +12 36 30.996360221           ~ 24 0
33 NGVS J123009.82+123736.5 G 12 30 09.82 +12 37 36.4           ~ 3 0
34 NGVS J123016.54+121556.8 G 12 30 16.54 +12 15 56.8           ~ 3 0
35 NGVS J123019.63+120924.6 GlC 12 30 19.632 +12 09 24.55           ~ 7 0
36 NGVS J123020.05+115518.7 G 12 30 20.0379562950 +11 55 18.766186235           ~ 3 0
37 NGVS J123021.83+122402.4 G 12 30 21.8275637745 +12 24 02.388572792           ~ 3 0
38 NGVS J123022.97+123148.7 G 12 30 22.97 +12 31 48.8           ~ 3 0
39 NGVS J123025.75+122621.1 GlC 12 30 25.752 +12 26 21.08           ~ 8 0
40 NGVS J123026.56+122044.6 G 12 30 26.56 +12 20 44.6           ~ 7 0
41 NGVS J123026.89+122331.1 GlC 12 30 26.897 +12 23 31.06           ~ 8 0
42 NGVS J123029.91+123822.2 G 12 30 29.91 +12 38 22.2           ~ 3 0
43 [ZPC2015] M87UCD 38 G 12 30 30.52 +12 40 15.8           ~ 2 0
44 NGVS J123030.86+121841.7 GlC 12 30 30.8585578520 +12 18 41.645633659           ~ 7 0
45 [SFH81] 1508 G 12 30 31.41 +12 25 24.8           ~ 8 0
46 NGVS J123031.44+125156.6 G 12 30 31.4384151988 +12 51 56.637557690           ~ 4 0
47 NGVS J123031.53+122602.6 GlC 12 30 31.529 +12 26 02.58           G 8 0
48 NGVS J123033.43+122954.3 G 12 30 33.43 +12 29 54.4           ~ 8 0
49 NGVS J123034.12+122246.5 GlC 12 30 34.123 +12 22 46.42           ~ 7 0
50 NGVS J123039.16+122132.5 GlC 12 30 39.1521004400 +12 21 32.421905948           ~ 6 0
51 NGVS J123041.81+122341.2 G 12 30 41.82 +12 23 41.2           ~ 8 0
52 NGVS J123045.34+122033.5 GlC 12 30 45.338 +12 20 33.47           ~ 8 0
53 [CHA90] 114 G 12 30 45.91 +12 25 01.5   20.77 20.11     ~ 26 0
54 [HJC2005] 1316-3 G 12 30 46.20 +12 24 23.1     20.27     ~ 21 0
55 NGVS J123046.50+122017.7 GlC 12 30 46.502 +12 20 17.74           ~ 9 0
56 [HJC2005] 1316-4 G 12 30 46.65 +12 24 22.2           ~ 10 0
57 NGVS J123047.40+123301.7 GlC 12 30 47.3914980464 +12 33 01.643199426           ~ 7 0
58 NGVS J123047.66+120825.2 G 12 30 47.66 +12 08 25.2           ~ 3 0
59 NGVS J123047.70+122430.5 G 12 30 47.70 +12 24 30.4   20.26 19.78     ~ 24 0
60 NGVS J123048.19+123510.7 GlC 12 30 48.1979481876 +12 35 10.877959048           ~ 16 0
61 [SFH81] 9053 G 12 30 48.30 +12 29 40.9           ~ 4 0
62 [SFH81] 887 G 12 30 48.93 +12 21 55.6           ~ 12 0
63 NGVS J123049.28+123718.2 G 12 30 49.2772661430 +12 37 18.136521006           ~ 4 0
64 M 87 BiC 12 30 49.42338230 +12 23 28.0438581 10.16 9.59 8.63   7.49 ~ 6452 3
65 [HJC2005] 1316-6 G 12 30 50.05 +12 24 08.9           ~ 10 0
66 LEDA 41362 GiC 12 30 50.591 +12 44 11.64   18.05 17.45   16.53 ~ 19 0
67 [SFH81] 825 G 12 30 51.03 +12 21 19.5           ~ 10 0
68 Hanes IV-90 GlC 12 30 51.0613336235 +12 26 11.869108949   20.56 19.46     ~ 13 0
69 NGVS J123051.65+121409.9 G 12 30 51.65 +12 14 10.0           ~ 7 0
70 NGVS J123051.75+122053.3 G 12 30 51.75 +12 20 53.3           ~ 10 0
71 [SFH81] 723 G 12 30 53.76 +12 20 21.8           ~ 11 0
72 [SFH81] 686 G 12 30 53.81 +12 28 18.7           ~ 9 0
73 NGVS J123053.88+121712.4 G 12 30 53.88 +12 17 12.6           ~ 9 0
74 NGVS J123054.66+122022.6 G 12 30 54.66 +12 20 22.6           ~ 8 0
75 [SFH81] 672 G 12 30 54.73 +12 21 38.3           ~ 11 0
76 [ZPC2015] M87UCD 31 G 12 30 55.33 +12 24 39.9           ~ 4 0
77 [SRB2011] H44905 G 12 30 57.08 +12 23 39.8           ~ 8 0
78 [JDJ2006] 3 G 12 30 57.3833546242 +12 25 44.499140903   19.32 17.97     ~ 44 0
79 [JPB2009] 187.7418941+12.2672600 G 12 30 58.06 +12 16 02.2           ~ 10 0
80 [SFH81] 477 G 12 30 59.91 +12 18 01.1           ~ 8 0
81 NGVS J123101.47+121924.5 G 12 31 01.4778575124 +12 19 24.597519380     19.33     ~ 23 0
82 NGVS J123102.14+122749.7 GlC 12 31 02.138 +12 27 49.72           ~ 7 0
83 NGVS J123102.59+123414.1 GlC 12 31 02.589 +12 34 14.12           ~ 8 0
84 NGVS J123103.69+123213.0 GlC 12 31 03.6815571016 +12 32 13.000801597           ~ 6 0
85 NGVS J123104.35+131042.5 G 12 31 04.3481048236 +13 10 42.663185681           ~ 5 0
86 NGVS J123104.43+122321.2 GlC 12 31 04.428 +12 23 21.23           ~ 7 0
87 [JDJ2006] 4 GlC 12 31 04.4757913483 +11 56 36.488486778           ~ 22 0
88 NGVS J123110.14+121627.9 GlC 12 31 10.142 +12 16 28.02           ~ 7 0
89 [SFH81] 6004 G 12 31 10.22 +12 16 01.1           ~ 8 0
90 NGVS J123111.31+123001.0 G 12 31 11.3004296481 +12 30 01.029697570           ~ 3 0
91 [JDJ2006] 5 GlC 12 31 11.8766910181 +12 41 01.081447941           ~ 27 0
92 NGVS J123116.32+121845.4 GlC 12 31 16.322 +12 18 45.40           ~ 6 0
93 [SRB2011] H30401 G 12 31 18.71 +12 15 44.9           ~ 8 0
94 [ZPC2015] M87UCD 1 G 12 31 19.27 +12 22 31.9           ~ 2 0
95 NGVS J123120.00+121158.1 GlC 12 31 20.002 +12 11 58.09           ~ 6 0
96 NGVS J123124.75+122525.8 G 12 31 24.7538526779 +12 25 25.793039599           ~ 3 0
97 NGVS J123125.25+121931.8 G 12 31 25.245 +12 19 31.74           ~ 4 0
98 NGVS J123128.36+122503.6 GlC 12 31 28.3597374413 +12 25 03.599290701           ~ 22 0
99 NGVS J123131.70+124130.4 G 12 31 31.70 +12 41 30.4           ~ 3 0
100 NGVS J123135.13+123459.4 G 12 31 35.1306941434 +12 34 59.382091039           ~ 4 0
101 NGVS J123137.44+121740.7 G 12 31 37.4425623514 +12 17 40.731752469           ~ 3 0
102 NGVS J123138.53+115923.9 G 12 31 38.53 +11 59 23.9           ~ 3 0
103 NGVS J123145.95+122721.1 GlC 12 31 45.958 +12 27 21.10           ~ 5 0
104 2MASS J12315289+1215589 G 12 31 52.8978463348 +12 15 59.053574946           ~ 42 0
105 NGVS J123157.60+124929.6 G 12 31 57.60 +12 49 29.6           ~ 3 0
106 NGVS J123157.99+131534.1 G 12 31 57.99 +13 15 34.1           ~ 3 0
107 NGVS J123204.35+122030.3 GlC 12 32 04.3488556303 +12 20 30.292024815           ~ 15 0
108 NGVS J123214.45+120159.0 G 12 32 14.45 +12 01 59.1           ~ 3 0
109 NGVS J123214.58+120305.3 GlC 12 32 14.5785201733 +12 03 05.286514594           ~ 11 0
110 NGVS J123223.49+115755.0 G 12 32 23.4924804678 +11 57 54.923255105           ~ 3 0
111 NGVS J123225.37+121956.8 G 12 32 25.3635392684 +12 19 56.726340143           ~ 4 0
112 [SRB2011] T15886 GlC 12 32 36.492 +12 20 57.12           ~ 9 0
113 NGVS J123329.47+121017.4 GlC 12 33 29.4713832451 +12 10 17.383650320           ~ 7 0
114 NGVS J123346.31+115702.3 G 12 33 46.3132290893 +11 57 02.229680134           ~ 3 0
115 NGC 4546 GiG 12 35 29.506 -03 47 35.62 11.89 11.30 10.32     ~ 206 1
116 M 104 LIN 12 39 59.43185 -11 37 22.9954 9.51 9.55 8.00 8.05   ~ 1302 3
117 NAME M60-UCD1 G 12 43 35.964 +11 32 04.69           ~ 76 0
118 M 60 GiP 12 43 40.008 +11 33 09.40   10.3       ~ 1277 0
119 ACO 3526 ClG 12 48 51.8 -41 18 21           ~ 1000 2
120 ACO S 740 ClG 13 43 32 -38 11.1           ~ 16 0
121 HCG 90 CGG 22 02 06.3 -31 55 48           ~ 125 0
122 NGC 7252 IG 22 20 44.7751096408 -24 40 41.905677809 12.26 12.46 12.06 11.57   ~ 672 1
123 NAME South America H2G 22 51 49.307 -17 52 23.96   16.97       ~ 295 3
124 NAME Local Group GrG ~ ~           ~ 7321 0

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2021.08.04-00:12:25

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