2021MNRAS.500..986H

Query : 2021MNRAS.500..986H

2021MNRAS.500..986H - Mon. Not. R. Astron. Soc., 500, 986-997 (2021/January-1)

Search for globular clusters associated with the Milky Way dwarf galaxies using Gaia DR2.

HUANG K.-W. and KOPOSOV S.E.

Abstract (from CDS):

We report the result of searching for globular clusters (GCs) around 55 Milky Way (MW) satellite dwarf galaxies within the distance of 450 kpc from the Galactic Centre except for the Large and Small Magellanic Clouds and the Sagittarius dwarf. For each dwarf, we analyse the stellar distribution of sources in Gaia DR2, selected by magnitude, proper motion, and source morphology. Using the kernel density estimation of stellar number counts, we identify 11 possible GC candidates. Cross-matched with existing imaging data, all 11 objects are known either GCs or galaxies and only Fornax GC 1-6 among them are associated with the targeted dwarf galaxy. Using simulated GCs, we calculate the GC detection limit MVlim that spans the range from MVlim∼-7 for distant dwarfs to MVlim∼0 for nearby systems. Assuming a Gaussian GC luminosity function, we compute that the completeness of the GC search is above 90 per cent for most dwarf galaxies. We construct the 90 per cent credible intervals/upper limits on the GC specific frequency SN of the MW dwarf galaxies: 12 < SN < 47 for Fornax, SN < 20 for the dwarfs with -12 < MV < -10, SN < 30 for the dwarfs with -10 < MV < -7, and SN < 90 for the dwarfs with MV > -7. Based on SN, we derive the probability of galaxies hosting GCs given their luminosity, finding that the probability of galaxies fainter than MV = -9 to host GCs is lower than 0.1.

Abstract Copyright: © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): globular clusters: general - galaxies: dwarf

Simbad objects: 69

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Number of rows : 69
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 NAME Tuc IV G 00 02.9 -60 51           ~ 90 0
2 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
3 NAME Sculptor Dwarf Galaxy G 01 00 09.4 -33 42 32   9.79 8.6 8.81   ~ 1498 4
4 NAME Cetus II G 01 17.9 -17 25           ~ 56 0
5 NAME Phoenix Dwarf Galaxy Sy1 01 51 06.3 -44 26 41   13.48 13.2 12.69   ~ 575 2
6 NAME Cetus III Dwarf Galaxy LSB 02 05 19.40 -04 16 12.0           ~ 32 0
7 NAME Tri II G 02 13 17.40 +36 10 42.4           ~ 164 0
8 NAME Segue 2 G 02 19 16.0 +20 10 31     15.2     ~ 299 0
9 NAME Eri III G 02 22 45.480 -52 17 04.92           ~ 79 0
10 NAME Fornax H1 Cl* 02 37 02.1 -34 11 00     16.59     ~ 107 0
11 NAME Fornax H2 GlC 02 38 44.24 -34 48 30.5   14.5       ~ 93 0
12 NAME Fornax H3 GlC 02 39 48.16 -34 15 28.6   13.59       ~ 131 0
13 MCG-06-07-001 G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1894 1
14 NAME Fornax 6 GlC 02 40 06.90 -34 25 19.2           ~ 17 0
15 NAME Fornax H4 GlC 02 40 07.697 -34 32 10.59   15.18 13.91 14.08   ~ 112 0
16 NAME Fornax H5 GlC 02 42 21.111 -34 06 05.80   14.5       ~ 101 0
17 NAME Hor I G 02 55 31.7 -54 07 08           ~ 169 0
18 NAME Horologium II G 03 16 32.1 -50 01 05           ~ 76 0
19 NAME Reticulum II G 03 35 42.1 -54 02 57           ~ 375 0
20 NAME Eridanus II G 03 44 21.1 -43 32 00           ~ 216 0
21 NAME Reticulum III G 03 45.4 -60 27           ~ 67 0
22 NAME Pic I G 04 43 47.4 -50 16 59           ~ 58 0
23 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
24 NAME Col I G 05 31.4 -28 02           ~ 60 0
25 ESO 206-20A G 06 41 36.7 -50 57 58   22.14 11.0 19.47   ~ 1190 0
26 NAME Carina II Dwarf Galaxy G 07 36 25.6 -57 59 57           ~ 86 0
27 NAME Car III Dwarf Galaxy G 07 38 31.2 -57 53 59           ~ 81 0
28 NAME UMa II Galaxy G 08 51 30.0 +63 07 48     13.3     ~ 410 0
29 NAME Leo T G 09 34 53.4 +17 03 05     15.1     ~ 434 0
30 NAME Antlia II Dwarf Galaxy G 09 35 32.8 -36 46 02           ~ 109 0
31 NAME Sextans C GlC 10 05 30.96 +00 04 15.4   15.5 13.9     ~ 354 1
32 NAME Segue 1 G 10 07 03.2 +16 04 25     15.3     ~ 517 1
33 Z 64-73 G 10 08 28.12 +12 18 23.4   11.3 10.0     ~ 1284 1
34 MCG-01-26-030 H2G 10 11 00.5 -04 41 30 12.48 12.13 11.93 11.78   ~ 789 2
35 NAME Sextans dSph LSB 10 13 02.9 -01 36 53   12 10.4     ~ 921 0
36 NAME UMa I Galaxy G 10 34 52.80 +51 55 12.0     14.4     ~ 355 1
37 NAME Willman 1 G 10 49 21.0 +51 03 00     15.2     ~ 345 0
38 Z 126-111 G 11 13 28.13 +22 09 10.1   12.9 12.0     ~ 899 0
39 NAME Leo V LSB 11 31 09.60 +02 13 12.0     16.0     ~ 234 0
40 NAME Leo IV LSB 11 32 57.0 -00 32 00     15.1     ~ 419 1
41 NAME Crater II Dwarf Galaxy G 11 49 14 -18 24.8           ~ 176 0
42 NAME Vir I Dwarf Galaxy LSB 12 00 09.6 -00 40 48           ~ 40 0
43 NAME Hydra II G 12 21 42.1 -31 59 07           ~ 118 0
44 NAME Coma Dwarf Galaxy G 12 26 59.0 +23 54 15     14.1     ~ 482 1
45 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
46 NAME CVn II dSph G 12 57 09.6 +34 19 12     16.1     ~ 287 2
47 NAME CVn I dSph G 13 28 03.5 +33 33 21     13.1     ~ 352 1
48 NAME Bootes III G 13 57 07.4 +26 46 30     12.6     ~ 115 1
49 NAME Bootes II G 13 58 00.0 +12 51 00     15.4     ~ 269 0
50 NAME Bootes Dwarf Spheroidal Galaxy G 14 00 00.0 +14 30 00     12.8     ~ 491 0
51 NGC 5466 GlC 14 05 27.29 +28 32 04.0     9.70     ~ 887 0
52 Z 318-18 G 15 09 08.0 +67 13 21   13.60 10.6     ~ 1459 0
53 NAME Draco II Gl? 15 52 47.6 +64 33 55           ~ 138 0
54 NAME Hercules Dwarf Galaxy G 16 31 02.0 +12 47 30     14.0     ~ 379 1
55 Z 300-12 G 17 20 14.335 +57 55 16.39   12.40 10.6     ~ 1428 1
56 NAME SDG G 18 55 19.0 -30 32 43   4.5 3.6     ~ 2438 2
57 NGC 6822 G 19 44 56.199 -14 47 51.29   18 8.1     ~ 1661 0
58 M 75 GlC 20 06 04.841 -21 55 20.14     8.26     ~ 394 0
59 NAME Ind II G 20 38.9 -46 10           ~ 31 0
60 NAME Indus I Cl* 21 08 49.970 -51 09 48.60           ~ 68 0
61 NAME Gru II G 22 04.1 -46 26           ~ 110 0
62 NAME Pegasus III LSB 22 24 22.6 +05 25 12           ~ 69 0
63 NAME Aquarius 2 G 22 33 55.5 -09 19 39           ~ 66 0
64 NAME Tuc II G 22 51 55.1 -58 34 08           ~ 192 0
65 NAME Grus I G 22 56 42.4 -50 09 48           ~ 126 0
66 NAME Pisces II G 22 58 31.0 +05 57 09     16.3     ~ 283 0
67 NAME Tuc V G 23 37.4 -63 16           ~ 84 0
68 NAME Phe II G 23 39 59.4 -54 24 22           ~ 107 0
69 NAME Tuc III G 23 56.6 -59 36           ~ 229 0

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