2024ApJ...966...93J

Query : 2024ApJ...966...93J

2024ApJ...966...93J - Astrophys. J., 966, 93 (2024/May-1)

Gas and Star Formation in Satellites of Milky Way Analogs.

JONES M.G., SAND D.J., KARUNAKARAN A., SPEKKENS K., OMAN K.A., BENNET P., BESLA G., CRNOJEVIC D., CUILLANDRE J.-C., FIELDER C.E., GWYN S. and MUTLU-PAKDIL B.

Abstract (from CDS):

We have imaged the entirety of eight (plus one partial) Milky Way (MW)-like satellite systems, a total of 42 (45) satellites, from the Satellites Around Galactic Analogs II catalog in both Hα and H I with the Canada-France-Hawaii Telescope and the Jansky Very Large Array. In these eight systems we have identified four cases where a satellite appears to be currently undergoing ram pressure stripping (RPS) as its H I gas collides with the circumgalactic medium (CGM) of its host. We also see a clear suppression of gas fraction (MHI/M*) with decreasing (projected) satellite-host separation-to our knowledge, the first time this has been observed in a sample of MW-like systems. Comparisons to the Auriga, A Project Of Simulating The Local Environment, and TNG50 cosmological zoom-in simulations show consistent global behavior, but they systematically underpredict gas fractions across all satellites by roughly 0.5 dex. Using a simplistic RPS model, we estimate the average peak CGM density that satellites in these systems have encountered to be $\mathrm{log}{\rho }_{\mathrm{cgm}}/{\rm{g}}\,{\mathrm{cm}}^{-3}\approx -27.3$. Furthermore, we see tentative evidence that these satellites are following a specific star formation rate to gas fraction relation that is distinct from field galaxies. Finally, we detect one new gas-rich satellite in the UGC 903 system with an optical size and surface brightness meeting the standard criteria to be considered an ultra-diffuse galaxy.

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

Journal keyword(s): Dwarf galaxies - Galaxy quenching - Ram pressure stripped tails - Interstellar atomic gas - Circumgalactic medium

VizieR on-line data: <Available at CDS (J/ApJ/966/93): table2.dat>

Nomenclature: Fig. 6, Table 2: [JSK2024] dw0122+1735 N=1.

Simbad objects: 68

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Number of rows : 68
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 SDSS J012108.46+173608.0 G 01 21 08.4664306752 +17 36 07.886072268           ~ 3 0
4 SDSS J012118.83+174514.1 G 01 21 18.832 +17 45 14.18           ~ 3 0
5 Z 459-41 AG? 01 21 47.793 +17 35 32.58   14.7       ~ 105 1
6 [JSK2024] dw0122+1735 G 01 21 58.6 +17 34 34           ~ 1 0
7 SDSS J012208.72+173141.3 G 01 22 08.722 +17 31 41.31           ~ 3 0
8 SDSS J012306.45+175329.2 G 01 23 06.454 +17 53 29.22           ~ 5 0
9 NAME Phoenix Dwarf Galaxy Sy1 01 51 06.3 -44 26 41   13.48 13.2 12.69   ~ 575 2
10 LEDA 909350 G 03 20 45.9 -15 34 31           ~ 3 0
11 MCG-03-09-027 AG? 03 21 51.72 -15 42 37.2   15.57   14.9 15.2 ~ 41 0
12 NGC 1309 GiG 03 22 06.5548977432 -15 23 59.791692912   12.08   12.5 11.7 ~ 246 1
13 DES 353742769 G 03 23 47.1 -15 24 01           ~ 2 0
14 LEDA 942204 G 03 41 21.52 -13 08 40.8           ~ 3 0
15 LEDA 941100 G 03 42 16.3 -13 13 01           ~ 4 0
16 APMUKS (BJ) B033959.58-133449.0 G 03 42 20.1 -13 25 18           ~ 5 0
17 NGC 1421 EmG 03 42 29.2806642840 -13 29 16.951034724   12.38       ~ 203 1
18 MCG-02-10-009 Sy2 03 42 56.065 -12 54 59.10   14.10   13.6 13.0 ~ 80 0
19 NAME Auriga reg 04 20 00.0 +38 05 00           ~ 238 0
20 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
21 UGC 4305 IG 08 19 04.9864630512 +70 43 13.086910452 12.06 11.72 11.39 11.11   ~ 812 2
22 Z 264-90 Sy1 09 16 45.5160392472 +53 26 34.300942764   14.7       ~ 50 0
23 DELS 8001595052001770 G 09 16 57.3 +53 00 36           ~ 2 0
24 DELS 8001595921001454 G 09 17 14.4 +53 13 47           ~ 2 0
25 Z 264-91 Sy2 09 17 39.9272205288 +52 59 34.398825756   16.68 15.97     ~ 70 0
26 DELS 8001595052002084 G 09 17 42.1 +53 01 38           ~ 2 0
27 MCG+09-15-115 G 09 17 46.325 +53 17 33.09   16       ~ 11 0
28 Z 264-92 GiG 09 17 59.055 +52 44 28.96   15.3       ~ 15 0
29 NGC 2906 AGN 09 32 06.2228278920 +08 26 30.486567516   13.1       ~ 189 0
30 M 81 Sy2 09 55 33.1726556496 +69 03 55.062505368   7.89 6.94     ~ 4725 3
31 LEDA 86636 LSB 12 09 42.731 +20 02 48.91   15.05       ~ 17 0
32 SDSS J121045.55+203534.5 G 12 10 45.556 +20 35 34.54           ~ 4 0
33 NGC 4158 SyG 12 11 10.1637235728 +20 10 32.267644824   13.1       ~ 96 0
34 SDSS J121123.56+200347.6 G 12 11 23.570 +20 03 47.60           ~ 4 0
35 Z 98-93 GiC 12 11 57.7593256344 +20 01 40.276606296   15.3       ~ 22 0
36 DELS 8000444093004677 G 12 12 28.2 +20 06 29           ~ 2 0
37 NGC 4454 GiP 12 28 50.7436825224 -01 56 21.072272316 12.95 12.72 11.87     ~ 89 1
38 Z 14-47 EmG 12 28 50.746 -02 03 38.90   15.1       ~ 22 0
39 2dFGRS TGN250Z166 LSB 12 28 57.895 -01 36 09.40   18.931   18.198   ~ 7 0
40 DELS 8000321038002417 G 12 30 14.2 -01 43 45           ~ 2 0
41 LEDA 3294304 LSB 12 30 21.273 -01 38 09.90   17.642   17.559   ~ 8 0
42 NAME Centaurus A BLL 13 25 27.61521044 -43 01 08.8050291   8.18 6.84 6.66   ~ 4774 3
43 ESO 324-24 LSB 13 27 37.6117 -41 28 44.128   12.91   12.13 12.3 ~ 107 0
44 DELS 8000459129001203 G 16 59 45.4 +22 40 02           ~ 2 0
45 DELS 8000461785003465 G 16 59 52.3 +23 16 49           ~ 2 0
46 Z 139-27 GiG 17 00 14.581 +23 06 22.83   15.3       ~ 64 2
47 SDSS J170033.18+225157.4 AG? 17 00 33.186 +22 51 57.50           ~ 7 0
48 NGC 6276 GiP 17 00 44.982 +23 02 38.43   15.2       ~ 25 1
49 NGC 6278 GiP 17 00 50.3235598776 +23 00 39.735179064   13.8       ~ 173 0
50 DELS 8000459131005849 G 17 01 25.8 +22 52 23           ~ 3 0
51 SDSS J170129.64+224352.0 AG? 17 01 29.63384 +22 43 51.9783           ~ 7 0
52 SDSS J170201.24+230948.7 AG? 17 02 01.24492 +23 09 48.7223           ~ 5 0
53 LEDA 1681024 AG? 17 02 19.014 +23 04 34.92           ~ 8 0
54 LEDA 1068443 EmG 22 23 20.727 -03 39 35.30   16.22   14.70   ~ 12 0
55 MCG-01-57-004 Sy2 22 23 39.1559745984 -03 25 54.005069604   13.2   12.9 12.6 ~ 45 0
56 SDSS J222348.92-034204.3 G 22 23 48.924 -03 42 04.30           ~ 3 0
57 DELS 8000311554004511 G 22 23 53.5 -03 25 47           ~ 2 0
58 LEDA 192092 G 22 23 55.194 -03 16 13.98           ~ 5 0
59 MCG-01-57-007 EmG 22 24 11.551 -03 28 58.41   14.5       ~ 42 0
60 SDSS J231413.10+045454.0 G 23 14 13.102 +04 54 54.01           ~ 3 0
61 SDSS J231429.15+043025.8 G 23 14 29.157 +04 30 25.82           ~ 4 0
62 NGC 7537 GiP 23 14 34.5173585112 +04 29 54.054910824   13.8       ~ 220 0
63 NGC 7541 GiG 23 14 43.857 +04 32 02.04   12.7       ~ 333 1
64 SDSS J231447.19+043823.8 G 23 14 47.196 +04 38 23.84           ~ 3 0
65 LEDA 1267347 G 23 15 06.458 +04 22 23.51           ~ 5 0
66 LEDA 5808692 G 23 15 29.808 +04 36 47.74           ~ 7 0
67 Z 431-72 G 23 28 35.2 +14 44 35 13.85 13.16 12.52     ~ 499 1
68 NAME Local Group GrG ~ ~           ~ 9325 0

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