2024ApJ...968...78W

Query : 2024ApJ...968...78W

2024ApJ...968...78W - Astrophys. J., 968, 78 (2024/June-3)

Devouring the Centaurus A Satellites: Modeling Dwarf Galaxies with Galacticus.

WEERASOORIYA S., BOVILL M.S., TAYLOR M.A., BENSON A.J. and LEAHY C.

Abstract (from CDS):

For the first time, systematic studies of dwarf galaxies are being conducted throughout the Local Volume, including the dwarf satellites of the nearby giant elliptical galaxy Centaurus A (NGC 5128). Given Centaurus A's mass (roughly 10 times larger than that of the Milky Way), AGN activity, and recent major mergers, investigating the dwarf galaxies of Centaurus A and their star formation physics is imperative. However, simulating the faintest dwarfs around a galaxy of Centaurus A's mass with sufficient resolution in a hydrodynamic simulation is computationally expensive and currently infeasible. In this study, we seek to reproduce the properties of Centaurus A dwarfs using the semianalytic model GALACTICUS to model dwarfs within a 700 kpc region around Centaurus A, corresponding approximately to its splashback radius. We investigate the effects of host halo mass and environment and predict observable properties of Centaurus A dwarfs using astrophysical prescriptions and parameters previously tuned to match properties of the Milky Way's satellite galaxies. This approach allows us to approximately replicate cumulative luminosity functions, and luminosity-metallicity and luminosity-half-light-radii relations observed in the Centaurus A satellites. We provide predictions for the velocity dispersions, and star formation histories of Centaurus A dwarfs. The agreement between our predicted star formation histories for Centaurus A dwarfs and those of the Milky Way dwarfs implies the presence of universal processes governing star formation in dwarf galaxies. Overall, our findings shed light on the star formation physics of dwarf galaxies in the Centaurus A system, revealing insights into their properties and dependence on the host environment.

Abstract Copyright: © 2024. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Galaxy evolution - N-body simulations - Dwarf galaxies - Galaxy formation

Simbad objects: 97

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Number of rows : 97
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 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
3 [MJB2015] dw1240-42 LSB 12 40 02.0 -42 24 44           ~ 4 0
4 [MJB2015] dw1241-32 LSB 12 41 27.0 -42 53 45           ~ 4 0
5 [MJB2015] dw1243-42b LSB 12 43 11.0 -42 26 37           ~ 5 0
6 [MJB2015] dw1243-42 LSB 12 43 13.0 -42 27 48           ~ 5 0
7 LEDA 2815819 G 12 44 21.5 -42 56 23   16.7       ~ 15 0
8 ESO 381-18 EmG 12 44 42.39 -35 58 00.2   15.79   14.84 15.1 ~ 59 0
9 [MJB2015] dw1251-40 LSB 12 51 56.0 -40 19 53           ~ 5 0
10 [MJB2015] dw1252-40 LSB 12 52 01.0 -40 21 55           ~ 5 0
11 [MJB2015] dw1252-43 LSB 12 52 25.0 -43 05 58           ~ 4 0
12 ESO 219-10 G 12 56 09.6 -50 08 38   16.96   15.36   ~ 24 0
13 [MJB2015] dw1257-41 LSB 12 57 45.0 -41 22 52           ~ 4 0
14 [MJB2015] dw1258-37 LSB 12 58 29.0 -37 07 21           ~ 4 0
15 [MJB2015] dw1302-40 LSB 13 02 49.0 -40 08 35           ~ 4 0
16 ESO 269-37 AG? 13 03 33.1398 -46 35 10.765   16.29   14.95   ~ 48 1
17 LEDA 166152 AG? 13 05 02.8154 -40 04 58.706   16.0   16.2 16.0 ~ 64 0
18 NGC 4945 Sy2 13 05 27.279 -49 28 04.44   9.31 14.40 7.55   ~ 1582 2
19 ESO 269-58 AG? 13 10 32.8047 -46 59 37.747   12.50   11.31   ~ 76 0
20 LEDA 2815820 G 13 11 14.1 -38 54 22   17.3       ~ 18 0
21 [TEP2018] dw1312-4246 G 13 12 10.180 -42 46 48.53           ~ 2 0
22 [TEP2018] dw1312-4244 G 13 12 10.930 -42 44 43.66           ~ 3 0
23 [TEP2018] dw1312-4218 G 13 12 22.480 -42 18 41.58           ~ 3 0
24 [TEP2018] dw1313-4246 G 13 12 42.870 -42 46 50.57           ~ 3 0
25 LEDA 166158 G 13 12 45.0 -41 49 55   19.3       ~ 39 0
26 ESO 269-66 GiC 13 13 09.2 -44 53 23   14.14       ~ 64 0
27 NGC 5011C GiC 13 13 11.88 -43 15 55.7   14.25       ~ 38 1
28 [TEP2018] dw1313-4211 G 13 13 34.280 -42 11 08.38           ~ 3 0
29 [TEP2018] dw1313-4214 G 13 13 36.400 -42 14 08.11           ~ 3 0
30 [TEP2018] dw1314-4204 G 13 14 08.170 -42 04 08.51           ~ 2 0
31 [TEP2018] dw1314-4230 G 13 14 21.930 -42 30 41.87           ~ 2 0
32 [TEP2018] dw1314-4142 G 13 14 44.820 -41 42 28.27           ~ 2 0
33 [TEP2018] dw1315-4232 G 13 15 02.980 -42 32 17.78           ~ 3 0
34 [TEP2018] dw1315-4309 G 13 15 33.970 -43 09 27.18           ~ 3 0
35 [MJB2015] dw1315-45 LSB 13 15 56.0 -45 45 02           ~ 6 0
36 [TEP2018] dw1316-4224 G 13 16 42.270 -42 24 05.32           ~ 3 0
37 [TEP2018] dw1317-4255 G 13 17 48.490 -42 55 40.45           ~ 3 0
38 [CSB2019] CenA-MM17-Dw11 G 13 17 49.20 -42 55 36.8           ~ 3 0
39 [TEP2018] dw1318-4233 G 13 18 05.590 -42 33 37.10           ~ 3 0
40 [MJB2015] dw1318-44 LSB 13 18 58.0 -44 53 41           ~ 5 0
41 [TEP2018] dw1319-4203 G 13 19 21.260 -42 03 38.74           ~ 2 0
42 [CSC2014] CenA-MM-Dw5 G 13 19 52.4 -41 59 38           ~ 9 0
43 LEDA 46663 AG? 13 21 47.40 -45 03 42.0           ~ 62 0
44 NGC 5102 EmG 13 21 57.6100832352 -36 37 48.395156160   9.74 9.65 8.47 10.2 ~ 389 1
45 LEDA 46680 G 13 22 01.0 -42 32 08   16.6       ~ 63 0
46 LEDA 2815822 G 13 22 12.0 -42 43 51   18.5       ~ 41 0
47 [MJB2015] dw1322-39 LSB 13 22 32.0 -39 54 22           ~ 10 0
48 [CSC2014] CenA-MM-Dw4 G 13 23 02.0 -41 47 10           ~ 9 0
49 [MJB2015] dw1323-40c LSB 13 23 37.0 -40 43 17           ~ 5 0
50 [MJB2015] dw1323-40b LSB 13 23 55.0 -40 50 09           ~ 10 0
51 [CSB2019] CenA-MM17-Dw10 G 13 24 32.90 -44 44 07.1           ~ 4 0
52 [MJB2015] dw1323-40 LSB 13 24 53.0 -40 45 41           ~ 10 0
53 NAME Centaurus A BLL 13 25 27.61521044 -43 01 08.8050291   8.18 6.84 6.66   ~ 4774 3
54 [MJB2015] dw1325-33 G? 13 25 41.0 -33 00 25           ~ 5 0
55 [CSC2014] CenA-MM-Dw6 G 13 25 57.0 -41 05 39           ~ 9 0
56 [MJB2015] dw1326-37 LSB 13 26 22.0 -37 23 08           ~ 5 0
57 [CSC2014] CenA-MM-Dw7 G 13 26 28.0 -43 33 24           ~ 9 0
58 [MJB2015] dw1326-35 G? 13 26 44.0 -35 05 00           ~ 4 0
59 LEDA 166167 G 13 27 27.8 -45 21 10           ~ 28 0
60 ESO 324-24 LSB 13 27 37.6117 -41 28 44.128   12.91   12.13 12.3 ~ 107 0
61 [MJB2015] dw1329-45 LSB 13 29 10.0 -45 10 31           ~ 6 0
62 [CSC2014] CenA-MM-Dw2 G 13 29 57.34 -41 52 22.6           ~ 14 0
63 [MJB2015] dw1330-34 G? 13 30 02.0 -34 00 14           ~ 4 0
64 [MJB2015] dw1330-33 G? 13 30 04.0 -33 50 06           ~ 4 0
65 [CSC2014] CenA-MM-Dw1 G 13 30 14.0 -41 53 36           ~ 17 0
66 [CSC2014] CenA-MM-Dw3 G 13 30 21.0 -42 11 33           ~ 20 0
67 [MJB2015] dw1331-40 G? 13 31 26.0 -40 15 47           ~ 4 0
68 [MJB2015] dw1331-37 LSB 13 31 32.0 -37 03 29           ~ 5 0
69 [CSC2014] CenA-MM-Dw9 G 13 33 01.5 -42 31 49           ~ 8 0
70 [CSC2014] CenA-MM-Dw8 G 13 33 34.0 -41 36 28           ~ 9 0
71 NGC 5206 GiG 13 33 43.9615937880 -48 09 03.953598228   11.62   10.40   ~ 121 0
72 [MJB2015] dw1335-33 G? 13 35 25.0 -33 18 00           ~ 2 0
73 [MJB2015] dw1336-44 LSB 13 36 44.0 -44 26 50           ~ 7 0
74 M 83 SBG 13 37 00.91920 -29 51 56.7400 8.85 8.11 7.52 7.21   ~ 2778 2
75 [MJB2015] dw1337-33 G? 13 37 02.0 -33 31 25           ~ 5 0
76 LEDA 592761 G 13 37 25.2 -39 53 52   16.1   16.3 16.5 ~ 47 0
77 [MJB2015] dw1337-44 LSB 13 37 34.0 -44 13 07           ~ 5 0
78 NGC 5237 EmG 13 37 39.056 -42 50 48.90   13.26 12.67 12.34   ~ 116 1
79 [MJB2015] dw1337-41 G? 13 37 55.0 -41 54 11           ~ 4 0
80 [MJB2015] dw1341-33 G? 13 41 13.0 -33 49 30           ~ 4 0
81 [MJB2015] dw1341-43 LSB 13 41 37.0 -43 51 17           ~ 9 0
82 LEDA 2815823 G 13 41 38.1 -42 34 55   18.1       ~ 29 0
83 LEDA 48515 G 13 42 05.7 -45 12 20   17.6       ~ 49 1
84 [MJB2015] dw1342-43 LSB 13 42 44.0 -43 15 19           ~ 9 0
85 LEDA 166172 G 13 43 36.0 -43 46 11           ~ 32 1
86 [MJB2015] dw1343-34 G? 13 43 49.0 -34 56 07           ~ 3 0
87 ESO 325-11 AG? 13 45 01.0528 -41 51 45.993   14.02   13.49 12.9 ~ 113 0
88 LEDA 2815824 G 13 46 01.0 -36 19 41   17.1       ~ 27 0
89 LEDA 166175 G 13 46 16.8 -45 41 05   19.2       ~ 37 1
90 NAME Cen N G 13 48 09.2 -47 33 54           ~ 24 0
91 LEDA 4614882 AG? 13 48 33.9801 -37 58 03.811           ~ 37 0
92 LEDA 166179 G 13 48 46.4 -46 59 46           ~ 36 1
93 MCG-06-30-025 EmG 13 49 17.5109711256 -36 03 48.860478360   11.00   10.11   ~ 120 1
94 LEDA 3097113 G 13 51 18.9 -46 58 25           ~ 36 0
95 ESO 384-16 AG? 13 57 01.37 -35 19 58.7   14.80   14.10 14.81 ~ 62 0
96 NGC 5408 EmG 14 03 20.907 -41 22 39.75   12.59   11.96 12.2 ~ 368 3
97 NAME Local Group GrG ~ ~           ~ 9325 0

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