2025ApJ...979..205S

Query : 2025ApJ...979..205S

2025ApJ...979..205S - Astrophys. J., 979, 205 (2025/February-1)

The Hubble Space Telescope Survey of M31 Satellite Galaxies. IV. Survey Overview and Lifetime Star Formation Histories.

SAVINO A., WEISZ D.R., DOLPHIN A.E., DURBIN M.J., KALLIVAYALIL N., WETZEL A., ANDERSON J., BESLA G., BOYLAN-KOLCHIN M., BROWN T.M., BULLOCK J.S., COLE A.A., COLLINS M.L.M., COOPER M.C., DEASON A.J., DOTTER A.L., FARDAL M., FERGUSON A.M.N., FRITZ T.K., GEHA M.C., GILBERT K.M., GUHATHAKURTA P., IBATA R., IRWIN M.J., JEON M., KIRBY E.N., LEWIS G.F., MACKEY D., MAJEWSKI S.R., MARTIN N., McCONNACHIE A., PATEL E., RICH R.M., SKILLMAN E.D., SIMON J.D., SOHN S.T., TOLLERUD E.J. and VAN DER MAREL R.P.

Abstract (from CDS):

From >1000 orbits of HST imaging, we present deep homogeneous resolved star color-magnitude diagrams that reach the oldest main-sequence turnoff and uniformly measured star formation histories (SFHs) of 36 dwarf galaxies (-6 ≥ MV ≥ -17) associated with the M31 halo, and for 10 additional fields in M31, M33, and the Giant Stellar Stream. From our SFHs, we find: (i) The median stellar age and quenching epoch of M31 satellites correlate with galaxy luminosity and galactocentric distance. Satellite luminosity and present-day distance from M31 predict the satellite quenching epoch to within 1.8 Gyr at all epochs. This tight relationship highlights the fundamental connection between satellite halo mass, environmental history, and star formation duration. (ii) There is no difference between the median SFH of galaxies on and off the great plane of Andromeda satellites. (iii) ∼50% of our M31 satellites show prominent ancient star formation (>12 Gyr ago) followed by delayed quenching (8-10 Gyr ago), which is not commonly observed among the MW satellites. (iv) A comparison with TNG50 and FIRE-2 simulated satellite dwarfs around M31-like hosts shows that some of these trends (dependence of SFH on satellite luminosity) are reproduced in the simulations while others (dependence of SFH on galactocentric distance, presence of the delayed-quenching population) are weaker or absent. We provide all photometric catalogs and SFHs as High-Level Science Products on MAST.

Abstract Copyright: © 2025. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Andromeda Galaxy - Hertzsprung Russell diagram - Dwarf galaxies - Galaxy evolution - Galaxy quenching

Status at CDS : Large table(s) will be appraised for possible ingestion in VizieR.

Simbad objects: 60

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Number of rows : 60
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 Andromeda XX G 00 07 30.70 +35 07 56.4     18.2     ~ 77 0
2 And XIX G 00 19 32.10 +35 02 37.1     15.6     ~ 168 0
3 IC 10 rG 00 20 17.33520 +59 18 13.6480   13.6 9.5     ~ 1185 1
4 NAME Andromeda XXVI G 00 23 45.6 +47 54 58     17.3     ~ 76 0
5 NAME Andromeda XXV G 00 30 08.9 +46 51 07     14.8     ~ 120 0
6 NGC 147 GiG 00 33 12.120 +48 30 31.46   12.0 9.5     ~ 720 1
7 NAME Andromeda III G 00 35 33.8 +36 29 52     14.4     ~ 309 0
8 NAME Cassiopeia III G 00 35 59.4 +51 33 35           ~ 59 0
9 NAME Andromeda XXX G 00 36 34.90 +49 38 48.0           ~ 59 0
10 NAME Andromeda XVII G 00 37 07.0 +44 19 20     15.8     ~ 101 0
11 NAME Andromeda XXVII G 00 37 27.1 +45 23 13     16.7     ~ 82 0
12 NGC 185 Sy2 00 38 57.9400026024 +48 20 15.035874648   9.10 9.2     ~ 840 1
13 M 110 GiG 00 40 22.0572349992 +41 41 07.507220136   8.92 8.07     ~ 1370 1
14 M 32 GiG 00 42 41.82480 +40 51 54.6120 9.51 9.03 8.08     ~ 2236 2
15 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
16 NAME Andromeda I G 00 45 39.8 +38 02 28   13.9 12.7     ~ 355 0
17 NAME Andromeda XI G 00 46 20.0 +33 48 05     17.5     ~ 130 0
18 NAME Andromeda XII G 00 47 27.0 +34 22 29     18.3     ~ 124 0
19 NAME Andromeda XIV G 00 51 35.0 +29 41 49     15.9     ~ 132 0
20 NAME Andromeda XIII G 00 51 51.0 +33 00 16     18.1     ~ 128 0
21 NAME Andromeda IX G 00 52 53.0 +43 11 45     16.3     ~ 176 1
22 NAME Pisces V G 00 59 29.8 +32 22 36     14.4     ~ 149 0
23 NAME Sculptor Dwarf Galaxy G 01 00 09.4 -33 42 32   9.79 8.6 8.81   ~ 1498 4
24 NAME Pisces I G 01 03 55.0 +21 53 06   16.18 14.3     ~ 404 0
25 IC 1613 GiC 01 04 48.4071 +02 07 10.185   10.42 10.01 9.77   ~ 1316 2
26 NAME Andromeda X G 01 06 33.70 +44 48 15.8     16.6     ~ 125 1
27 NAME Andromeda V G 01 10 17.1 +47 37 41     15.3     ~ 215 0
28 NAME Andromeda XV G 01 14 18.7 +38 07 03     14.6     ~ 123 0
29 NAME Andromeda II G 01 16 29.8 +33 25 09     11.7     ~ 402 0
30 NAME Andromeda XXIV G 01 18 30.0 +46 21 58     16.3     ~ 64 0
31 NAME Tri III G 01 21 40.5 +26 23 24           ~ 9 0
32 NAME Andromeda XXII G 01 27 40.0 +28 05 25     18.0     ~ 95 0
33 NAME Andromeda XXIII G 01 29 21.8 +38 43 08     14.2     ~ 88 0
34 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 6226 1
35 NAME Phoenix Dwarf Galaxy Sy1 01 51 06.3 -44 26 41   13.48 13.2 12.69   ~ 575 2
36 MCG-06-07-001 G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1894 1
37 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
38 NAME Andromeda XXXIII G 03 01 23.6 +40 59 18           ~ 43 0
39 NAME Eridanus II G 03 44 21.1 -43 32 00           ~ 216 0
40 ESO 206-20A G 06 41 36.7 -50 57 58   22.14 11.0 19.47   ~ 1190 0
41 NAME Leo T G 09 34 53.4 +17 03 05     15.1     ~ 434 0
42 Z 64-73 G 10 08 28.12 +12 18 23.4   11.3 10.0     ~ 1284 1
43 NAME Sextans dSph LSB 10 13 02.9 -01 36 53   12 10.4     ~ 921 0
44 Z 126-111 G 11 13 28.13 +22 09 10.1   12.9 12.0     ~ 899 0
45 NAME CVn I dSph G 13 28 03.5 +33 33 21     13.1     ~ 352 1
46 NAME Bootes Dwarf Spheroidal Galaxy G 14 00 00.0 +14 30 00     12.8     ~ 491 0
47 Z 318-18 G 15 09 08.0 +67 13 21   13.60 10.6     ~ 1459 0
48 Z 300-12 G 17 20 14.335 +57 55 16.39   12.40 10.6     ~ 1428 1
49 NAME SDG G 18 55 19.0 -30 32 43   4.5 3.6     ~ 2438 2
50 NGC 6822 G 19 44 56.199 -14 47 51.29   18 8.1     ~ 1661 0
51 NAME Andromeda XXVIII G 22 32 41.20 +31 12 58.2     15.6     ~ 88 0
52 NAME Lacerta I G 22 58 16.3 +41 17 28           ~ 53 0
53 NAME Andromeda XXXIV G 23 18 27.8 +33 21 32           ~ 8 0
54 NAME Andromeda VII GiG 23 26 31.0 +50 40 33   13.6 11.8     ~ 222 1
55 Z 431-72 G 23 28 35.2 +14 44 35 13.85 13.16 12.52     ~ 499 1
56 NAME Peg dSph GiG 23 51 46.3 +24 34 57   14.5 13.2     ~ 250 2
57 NAME Pegasus W Dwarf Galaxy G 23 53 14.99560 +22 06 07.0928           ~ 8 0
58 NAME Andromeda XXI G 23 54 47.7 +42 28 15     14.8     ~ 117 0
59 NAME Andromeda XXIX G 23 58 55.6 +30 45 20     16.0     ~ 61 0
60 NAME Andromeda Stream St* ~ ~           ~ 77 1

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