2009ApJ...696..385G

Query : 2009ApJ...696..385G

2009ApJ...696..385G - Astrophys. J., 696, 385-395 (2009/May-1)

H I in local group dwarf galaxies and stripping by the galactic halo.

GRCEVICH J. and PUTMAN M.E.

Abstract (from CDS):

We examine the H I content and environment of all of the Local Group dwarf galaxies (Mtot< 1010 M☉), including the numerous newly discovered satellites of the Milky Way and M31. All of the new dwarfs, with the exception of Leo T, have no detected H I. The majority of dwarf galaxies within ∼270 kpc of the Milky Way or Andromeda are undetected in H I (<104 M ☉ for Milky Way dwarfs), while those further than ∼270 kpc are predominantly detected with masses ∼105 to 108 M☉. Analytical ram-pressure arguments combined with velocities obtained via proper motion studies allow for an estimate of the halo density of the Milky Way at several distances. This halo density is constrained to be greater than 2x 10–4-3x10–4/cm3 out to distances of at least 70 kpc. This is broadly consistent with theoretical models of the diffuse gas in a Milky Way-like halo and is consistent with this component hosting a large fraction of a galaxy's baryons. Accounting for completeness in the dwarf galaxy count, gasless dwarf galaxies could have provided at most 2.1x108 M☉ of H I gas to the Milky Way, which suggests that most of our Galaxy's star formation fuel does not come from accreted small satellites in the current era.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: halo - galaxies: dwarf - galaxies: formation - galaxies: ISM - Local Group

Errata: erratum vol. 824, art. 151 (2016)

Simbad objects: 71

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Number of rows : 71
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 MCG-03-01-015 G 00 01 57.9 -15 27 50   11.50 11.10 10.93   ~ 782 2
2 HD 225001 * 00 02 32.3999067312 +16 15 23.627167164   7.29 7.23     A0 22 0
3 IC 10 rG 00 20 17.33520 +59 18 13.6480   13.6 9.5     ~ 1185 1
4 NAME Cetus Dwarf Galaxy G 00 26 10.8 -11 03 14     13.2     ~ 257 0
5 NAME Magellanic Stream HVC 00 32 -30.0           ~ 1079 1
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 Andromeda XVII G 00 37 07.0 +44 19 20     15.8     ~ 101 0
9 NGC 185 Sy2 00 38 57.9400026024 +48 20 15.035874648   9.10 9.2     ~ 840 1
10 M 110 GiG 00 40 22.0572349992 +41 41 07.507220136   8.92 8.07     ~ 1370 1
11 NAME Andromeda VIII blu 00 42 06.0 +40 37 00           ~ 27 0
12 NAME Andromeda IV G 00 42 32.3 +40 34 19           ~ 80 0
13 M 32 GiG 00 42 41.82480 +40 51 54.6120 9.51 9.03 8.08     ~ 2236 2
14 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
15 NAME Andromeda I G 00 45 39.8 +38 02 28   13.9 12.7     ~ 355 0
16 NAME Andromeda XI G 00 46 20.0 +33 48 05     17.5     ~ 130 0
17 NAME Andromeda XII G 00 47 27.0 +34 22 29     18.3     ~ 124 0
18 NAME Andromeda XIV G 00 51 35.0 +29 41 49     15.9     ~ 132 0
19 NAME Andromeda XIII G 00 51 51.0 +33 00 16     18.1     ~ 128 0
20 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
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 Scl Group GrG 01 00 06 -33 44.2           ~ 526 0
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 GD 12 WD* 01 10 11.7890663736 +27 01 04.671217884   15.02   15.0   DA3.5 45 0
28 NAME Andromeda V G 01 10 17.1 +47 37 41     15.3     ~ 215 0
29 NAME Andromeda XV G 01 14 18.7 +38 07 03     14.6     ~ 123 0
30 NAME Andromeda II G 01 16 29.8 +33 25 09     11.7     ~ 402 0
31 NAME Phoenix Dwarf Galaxy Sy1 01 51 06.3 -44 26 41   13.48 13.2 12.69   ~ 575 2
32 NAME Sagittarius Stream St* 02 22 +00.0           ~ 1001 0
33 MCG-06-07-001 G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1894 1
34 UGCA 92 AG? 04 32 03.8366 +63 36 51.243   16.15       ~ 128 0
35 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
36 ESO 206-20A G 06 41 36.7 -50 57 58   22.14 11.0 19.47   ~ 1190 0
37 NAME UMa II Galaxy G 08 51 30.0 +63 07 48     13.3     ~ 410 0
38 NAME Leo T G 09 34 53.4 +17 03 05     15.1     ~ 434 0
39 Z 153-10 G 09 59 26.46 +30 44 47.0 14.08 13.54 13.26 13.33   ~ 652 0
40 Z 36-12 H2G 10 00 00.8217342072 +05 20 09.533389560 12.77 12.25 11.89 11.71   ~ 569 0
41 NAME Antlia Dwarf Galaxy G 10 04 03.9 -27 20 01 16.73 15.69 15.17 15.00   ~ 221 1
42 NAME Segue 1 G 10 07 03.2 +16 04 25     15.3     ~ 517 1
43 Z 64-73 G 10 08 28.12 +12 18 23.4   11.3 10.0     ~ 1284 1
44 MCG-01-26-030 H2G 10 11 00.5 -04 41 30 12.48 12.13 11.93 11.78   ~ 789 2
45 NAME Sextans dSph LSB 10 13 02.9 -01 36 53   12 10.4     ~ 921 0
46 NAME UMa I Galaxy G 10 34 52.80 +51 55 12.0     14.4     ~ 355 1
47 NAME Willman 1 G 10 49 21.0 +51 03 00     15.2     ~ 345 0
48 Z 126-111 G 11 13 28.13 +22 09 10.1   12.9 12.0     ~ 899 0
49 NAME Leo V LSB 11 31 09.60 +02 13 12.0     16.0     ~ 234 0
50 NAME Leo IV LSB 11 32 57.0 -00 32 00     15.1     ~ 419 1
51 NAME Coma Dwarf Galaxy G 12 26 59.0 +23 54 15     14.1     ~ 482 1
52 NAME CVn II dSph G 12 57 09.6 +34 19 12     16.1     ~ 287 2
53 NAME CVn I dSph G 13 28 03.5 +33 33 21     13.1     ~ 352 1
54 NAME Bootes II G 13 58 00.0 +12 51 00     15.4     ~ 269 0
55 NAME Bootes Dwarf Spheroidal Galaxy G 14 00 00.0 +14 30 00     12.8     ~ 491 0
56 Z 318-18 G 15 09 08.0 +67 13 21   13.60 10.6     ~ 1459 0
57 ACO 2151 ClG 16 05 15.0 +17 44 55           ~ 594 3
58 Z 300-12 G 17 20 14.335 +57 55 16.39   12.40 10.6     ~ 1428 1
59 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
60 NAME SDG G 18 55 19.0 -30 32 43   4.5 3.6     ~ 2438 2
61 NAME Orphan Stream St* 19 09 -23.           ~ 281 0
62 NAME Sgr dIG G 19 29 59.0 -17 40 41   15.5 13.6     ~ 323 1
63 MCG-02-53-003 G 20 46 51.7 -12 50 54 15.75 15.18 14.83 14.46   ~ 470 1
64 IC 5152 rG 22 02 41.521 -51 17 47.20   11.03 10.9 10.19   ~ 273 1
65 NAME Tuc Galaxy G 22 41 49.6 -64 25 10   15.7 15.2     ~ 324 0
66 MCG-05-55-012 G 23 26 27.52 -32 23 19.5 15.34 14.71 14.23 14.03   ~ 163 0
67 NAME Andromeda VII GiG 23 26 31.0 +50 40 33   13.6 11.8     ~ 222 1
68 Z 431-72 G 23 28 35.2 +14 44 35 13.85 13.16 12.52     ~ 499 1
69 NAME Peg dSph GiG 23 51 46.3 +24 34 57   14.5 13.2     ~ 250 2
70 NAME Local Group GrG ~ ~           ~ 9325 0
71 NAME Monoceros Stream St* ~ ~           ~ 374 1

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