2015MNRAS.453..338W

Query : 2015MNRAS.453..338W

2015MNRAS.453..338W - Mon. Not. R. Astron. Soc., 453, 338-344 (2015/October-2)

On the neutral gas content of nine new Milky Way satellite galaxy candidates.

WESTMEIER T., STAVELEY-SMITH L., CALABRETTA M., JUREK R., KORIBALSKI B.S., MEYER M., POPPING A. and WONG O.I.

Abstract (from CDS):

We use a new, improved version of the HI Parkes All-Sky Survey to search for HI emission from nine new, ultrafaint Milky Way satellite galaxy candidates recently discovered in data from the Dark Energy Survey. None of the candidates is detected in Hi, implying upper limits for their HI masses of typically several hundred to a few thousand solar masses. The resulting upper limits on M_HI/ L_V and M_HI/ M_* suggest that at least some of the new galaxy candidates are HI deficient. This finding is consistent with the general HI deficiency of satellite galaxies located within the Milky Way's virial radius and supports the hypothesis that gas is being removed from satellites by tidal and ram-pressure forces during perigalactic passages. In addition, some of the objects may be embedded in, and interacting with, the extended neutral and ionized gas filaments of the Magellanic Stream.

Abstract Copyright: © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2015)

Journal keyword(s): galaxies: evolution - galaxies: interactions - Local Group

Simbad objects: 20

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Number of rows : 20
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 Magellanic Stream HVC 00 32 -30.0           ~ 1079 1
2 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
3 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
4 NAME Phoenix Dwarf Galaxy Sy1 01 51 06.3 -44 26 41   13.48 13.2 12.69   ~ 575 2
5 NAME Eri III G 02 22 45.480 -52 17 04.92           ~ 79 0
6 NAME Hor I G 02 55 31.7 -54 07 08           ~ 169 0
7 ESO 154-23 AG? 02 56 50.38 -54 34 17.1   12.63   12.18 12.5 ~ 123 0
8 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
9 NAME Reticulum II G 03 35 42.1 -54 02 57           ~ 375 0
10 NAME Eridanus II G 03 44 21.1 -43 32 00           ~ 216 0
11 NAME Pic I G 04 43 47.4 -50 16 59           ~ 58 0
12 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
13 NAME Leo T G 09 34 53.4 +17 03 05     15.1     ~ 434 0
14 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
15 NGC 6822 G 19 44 56.199 -14 47 51.29   18 8.1     ~ 1661 0
16 NAME Indus I Cl* 21 08 49.970 -51 09 48.60           ~ 68 0
17 NAME Tuc II G 22 51 55.1 -58 34 08           ~ 192 0
18 NAME Grus I G 22 56 42.4 -50 09 48           ~ 126 0
19 NAME Phe II G 23 39 59.4 -54 24 22           ~ 107 0
20 NAME Local Group GrG ~ ~           ~ 9325 0

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