2020ApJ...899..140V

Query : 2020ApJ...899..140V

2020ApJ...899..140V - Astrophys. J., 899, 140-140 (2020/August-3)

A Gaia-based catalog of candidate stripped nuclei and luminous globular clusters in the halo of Centaurus A.

VOGGEL K.T., SETH A.C., SAND D.J., HUGHES A., STRADER J., CRNOJEVIC D. and CALDWELL N.

Abstract (from CDS):

Tidally stripped galaxy nuclei and luminous globular clusters (GCs) are important tracers of the halos and assembly histories of nearby galaxies, but are difficult to reliably identify with typical ground-based imaging data. In this paper we present a new method to find these massive star clusters using Gaia DR2, focusing on the massive elliptical galaxy Centaurus A (Cen A). We show that stripped nuclei and GCs are partially resolved by Gaia at the distance of Cen A, showing characteristic astrometric and photometric signatures. We use this selection method to produce a list of 632 new candidate luminous clusters in the halo of Cen A out to a projected radius of 150 kpc. Adding in broadband photometry and visual examination improves the accuracy of our classification. In a spectroscopic pilot program we have confirmed five new luminous clusters, which includes the 7th and 10th most luminous GC in Cen A. Three of the newly discovered GCs are further away from Cen A than all previously known GCs. Several of these are compelling candidates for stripped nuclei. We show that our novel Gaia selection method retains at least partial utility out to distances of ∼25 Mpc and hence is a powerful tool for finding and studying star clusters in the sparse outskirts of galaxies in the local universe.

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

Journal keyword(s): Globular star clusters - Elliptical galaxies - Ultracompact dwarf galaxies - Galaxy kinematics - Star clusters - Galaxy nuclei

VizieR on-line data: <Available at CDS (J/ApJ/899/140): table2.dat table3.dat table4.dat>

Simbad objects: 82

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Number of rows : 82
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 ACO S 373 ClG 03 38 29.4 -35 27 08           ~ 2029 0
3 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
4 Gaia DR2 6088142809540202368 Gl? 13 16 24.5135574984 -44 33 16.512625692           ~ 1 0
5 DENIS J131810.8-440926 Gl? 13 18 10.887 -44 09 26.10         18.060 ~ 3 0
6 [HSS2021] 183480 Gl? 13 23 09.8032465296 -43 52 28.051067172           ~ 3 0
7 [BBP2008] HH-080 GlC 13 23 38.3171511576 -42 46 22.991462580     17.8     ~ 9 0
8 [BBP2008] HH-044 GlC 13 23 42.3336641040 -43 09 37.775293344 19.37 19.01 18.12 17.59 17.03 ~ 13 0
9 [HSS2021] 198648 GlC 13 23 49.5985196736 -43 14 32.074054836 20.39 19.91 18.91 18.36 17.60 ~ 6 0
10 [BBP2008] AAT101906 GlC 13 23 58.7591720256 -43 01 34.970059596 20.45 19.90 18.89 18.28 17.57 ~ 5 0
11 [WHB2007] GC0565 * 13 24 06.5926056485 -42 52 58.628647030           ~ 3 0
12 [HSS2021] 209945 GlC 13 24 18.0495559272 -42 49 01.043730300 19.52 19.33 18.50 17.99 17.45 ~ 7 0
13 [HSS2021] 217309 GlC 13 24 36.8547040344 -43 19 16.278316176 20.01 19.82 19.03 18.53 18.00 ~ 14 0
14 [VHH81] 41 GlC 13 24 38.9656460520 -43 20 06.486409572 20.20 19.59 18.59 17.94 17.32 ~ 28 0
15 [VHH81] 29 GlC 13 24 40.3771770240 -43 18 05.308939512 19.77 19.15 18.15 17.54 16.89 ~ 36 0
16 [HSS2021] 218589 GlC 13 24 40.4011043136 -43 35 04.954162308 20.06 19.83 19.00 18.49 17.98 ~ 5 0
17 [HSS2021] 218734 GlC 13 24 40.8029490774 -42 41 01.618948803           ~ 3 0
18 [BBP2008] AAT109380 * 13 24 43.5487551096 -43 08 43.191008412 19.64 19.52 18.80 18.32 17.87 ~ 5 0
19 [VHH81] 9 GlC 13 24 46.6917962760 -43 01 18.475652496 20.00 19.76 18.95 18.40 17.90 ~ 8 0
20 [VHH81] 10 GlC 13 24 48.0295029624 -43 08 14.252985384 19.87 19.44 18.49 17.91 17.33 ~ 10 0
21 [VHH81] 42 GlC 13 24 50.8459568064 -43 01 22.969030404 20.53 19.91 18.86 18.24 17.53 ~ 9 0
22 [WHB2007] GC0067 GlC 13 24 51.4691563853 -43 12 11.111484819 19.64 19.33 18.50 18.01 17.42 ~ 15 0
23 Gaia DR2 6087554291638277504 Gl? 13 24 53.7445541112 -44 55 54.608593836           ~ 1 0
24 [HSS2021] 223957 GlC 13 24 54.3453849720 -42 53 24.723137364 18.76 18.24 17.25 16.67 16.02 ~ 18 0
25 [VHH81] 11 GlC 13 24 54.7069756200 -43 01 21.773072820 19.55 18.96 17.91 17.26 16.61 ~ 36 0
26 [VHH81] 31 GlC 13 24 57.4193525592 -43 01 08.176077660 20.09 19.42 18.38 17.75 17.06 ~ 15 0
27 [HGH92] G369 GlC 13 24 57.4971515520 -42 59 23.335006056 19.82 19.58 18.74 18.22 17.69 ~ 9 0
28 [HGH2004] 201.24254-42.93612 GlC 13 24 58.1998428312 -42 56 10.050292680 19.34 18.73 17.71 17.10 16.44 ~ 33 0
29 [PFF2004] gc 28 GlC 13 25 01.1435024496 -42 56 51.598015548 20.11 19.68 18.75 18.20 17.60 ~ 9 1
30 [VHH81] 4 GlC 13 25 01.8018131256 -43 09 25.486559676 19.10 18.86 18.04 17.50 16.98 ~ 19 0
31 [HSS2021] 227290 GlC 13 25 03.3560325552 -42 50 46.068274356 20.22 19.50 18.44 17.81 17.15 ~ 14 0
32 [VHH81] 43 GlC 13 25 04.7818464048 -43 09 38.897564328 19.74 19.45 18.60 18.07 17.53 ~ 14 0
33 2MASS J13250501-4257152 GlC 13 25 05.0117682000 -42 57 15.261735132 18.96 18.39 17.41 16.81 16.19 ~ 11 0
34 [VHH81] 12 GlC 13 25 05.6851767120 -43 10 30.872058411   18.82 17.74 17.74   ~ 25 0
35 [HSS2021] 228330 GlC 13 25 06.2236711704 -43 15 11.703993264 20.02 19.60 18.68 18.13 17.51 ~ 8 0
36 [PFF2004] gc 39 * 13 25 09.0937236098 -42 24 00.862631803 20.01 19.77 18.95 18.44 17.91 ~ 6 0
37 2MASS J13251025-4253330 GlC 13 25 10.2586705656 -42 53 33.015067188 19.33 18.79 17.80 17.26 16.55 ~ 12 0
38 [HGH2004] 201.29370-42.74801 GlC 13 25 10.4802150120 -42 44 52.715652360 19.23 18.84 17.94 17.40 16.79 ~ 14 0
39 [HSS2021] 230226 Gl? 13 25 11.1109224479 -43 30 33.178406244           ~ 3 0
40 [HSS2021] 230667 GlC 13 25 12.1943401632 -43 16 33.911054112 19.91 19.74 18.97 18.47 17.91 ~ 7 0
41 [R2001b] f2.GC-61 GlC 13 25 12.8712194544 -43 07 59.228291604 19.65 19.15 18.20 17.60 17.03 ~ 22 0
42 [PFF2004] gc 46 * 13 25 14.8118899591 -43 41 10.654309692 19.91 19.72 18.93 18.43 17.95 ~ 6 0
43 [HSS2021] 232153 GlC 13 25 16.2520025424 -42 50 53.254983624 19.58 19.34 18.50 18.02 17.50 ~ 9 0
44 NAME Centaurus A BLL 13 25 27.61521044 -43 01 08.8050291   8.18 6.84 6.66   ~ 4774 3
45 [R2001b] f2.GC-26 GlC 13 25 30.3895222920 -43 11 49.697197188 20.11 19.56 18.56 17.94 17.35 ~ 22 0
46 [VHH81] 44 GlC 13 25 31.7317181472 -43 19 22.746120024 19.76 19.50 18.69 18.14 17.66 ~ 30 0
47 [R2001b] f2.GC-23 GlC 13 25 32.7853774512 -43 07 02.294656032 20.08 19.67 18.77 18.23 17.64 ~ 23 0
48 [HSS2021] 239126 GlC 13 25 34.9970266272 -42 36 04.947471864 20.01 19.57 18.59 18.00 17.41 ~ 7 0
49 [WHB2007] GC0434 GlC 13 25 37.8471244776 -42 56 28.044367368           ~ 4 0
50 [VHH81] 17 GlC 13 25 39.7188791400 -42 55 59.137358376 18.82 18.51 17.63 17.10 16.57 ~ 36 0
51 [HSS2021] 241201 GlC 13 25 40.5950031794 -43 21 13.876114359 19.37 19.01 18.12 17.59 17.03 ~ 13 0
52 [VHH81] 19 GlC 13 25 43.3840630536 -43 07 22.928276928 19.37 19.01 18.12 17.59 17.03 ~ 17 0
53 [VHH81] 20 GlC 13 25 49.6815025248 -42 54 49.291233084 19.18 18.83 17.95 17.43 16.88 ~ 11 0
54 [HSS2021] 244751 GlC 13 25 49.9376492592 -42 52 09.292652436 19.80 19.55 18.69 18.18 17.65 ~ 7 0
55 [VHH81] 21 GlC 13 25 52.7266111104 -43 05 46.501781856 19.16 18.76 17.87 17.32 16.77 ~ 51 0
56 [VHH81] 22 GlC 13 25 53.5504608507 -42 59 07.532093559 19.39 19.06 18.15 17.62 17.07 ~ 33 0
57 [BBP2008] AAT329848 GlC 13 26 01.2579256440 -43 34 15.580233408 19.44 19.19 18.39 17.89 17.37 ~ 5 0
58 [VHH81] 25 GlC 13 26 02.8277560464 -42 56 57.008606640 20.17 19.56 18.49 17.85 17.17 ~ 16 0
59 [VHH81] 7 GlC 13 26 05.3936216880 -42 56 32.376406056 18.38 18.03 17.17 16.65 16.23 ~ 42 0
60 [VHH81] 36 GlC 13 26 07.7152331040 -42 52 00.209032536 19.42 19.19 18.35 17.81 17.33 ~ 29 0
61 [VHH81] 37 GlC 13 26 10.5651604212 -42 53 42.638068584 19.86 19.38 18.43 17.87 17.26 ~ 35 0
62 [HSS2021] 254668 GlC 13 26 15.250 -42 48 29.40 19.99 19.26 18.13 17.47 16.77 ~ 12 0
63 [R2001b] f1.GC-22 * 13 26 15.8663359440 -42 55 00.861593916 19.02 18.78 18.02 17.58 17.14 ~ 10 0
64 [VHH81] 50 GlC 13 26 19.6401543552 -43 03 18.670102380 20.09 19.68 18.74 18.17 17.57 ~ 12 0
65 [HSS2021] 258671 GlC 13 26 23.7648774888 -42 54 01.055364444 19.67 19.30 18.41 17.87 17.32 ~ 20 0
66 [HSS2021] 258860 GlC 13 26 24.1623158640 -42 47 00.695012100           ~ 3 0
67 Gaia DR3 6088802550875162752 GlC 13 26 38.4893175952 -42 45 45.732252967           ~ 1 0
68 [HSS2021] 266874 Gl? 13 26 41.3283544248 -42 42 14.169071484           ~ 3 0
69 [HSS2021] 268768 GlC 13 26 45.367 -43 26 34.12 19.75 19.51 18.72 18.23 17.76 ~ 6 0
70 NGC 5139 GlC 13 26 47.28 -47 28 46.1           ~ 3677 0
71 [HSS2021] 272747 GlC 13 26 53.911 -43 19 17.73 19.54 19.17 18.28 17.73 17.16 ~ 8 0
72 [HSS2021] 277144 GlC 13 27 03.403 -42 27 17.13 19.92 19.37 18.41 17.81 17.17 ~ 7 0
73 Gaia DR2 6088754859558517376 Gl? 13 28 25.1521014480 -42 51 29.885970096           ~ 1 0
74 Gaia DR2 6087314636765266304 Gl? 13 29 17.2156889160 -45 12 46.465859664           ~ 1 0
75 [HSS2021] 345370 Gl? 13 29 43.7744505936 -42 23 29.055341616           ~ 3 0
76 Gaia DR2 6087608373867240064 Gl? 13 30 34.9094267328 -44 40 00.935352984           ~ 1 0
77 Gaia DR2 6112604400629377280 Gl? 13 31 27.0906608520 -42 36 40.763117592           ~ 1 0
78 Gaia DR2 6112922739310406784 Gl? 13 32 12.1756324920 -41 18 01.815267024           ~ 1 0
79 Gaia DR2 6112634053092211712 Gl? 13 33 54.8220924336 -42 21 45.277941168           ~ 1 0
80 Gaia DR2 6112539495091836032 Gl? 13 34 08.9245177872 -42 51 59.622749100           ~ 1 0
81 M 54 GlC 18 55 03.33 -30 28 47.5           ~ 1164 0
82 NAME SDG G 18 55 19.0 -30 32 43   4.5 3.6     ~ 2438 2

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