2014MNRAS.442L..46T

Query : 2014MNRAS.442L..46T

2014MNRAS.442L..46T - Mon. Not. R. Astron. Soc., 442, L46-L50 (2014/July-3)

The Arecibo Galaxy Environment Survey - VIII. Discovery of an isolated dwarf galaxy in the Local Volume.

TAYLOR R., MINCHIN R.F., HERBST H. and SMITH R.

Abstract (from CDS):

The Arecibo Galaxy Environment Survey has detected a nearby H I source at a heliocentric velocity of +363 km/s. The object was detected through its neutral hydrogen emission and has an obvious possible optical counterpart in Sloan Digital Sky Survey data (though it does not have an optical redshift measurement). We discuss three possible scenarios for the object: (1) it is within the Local Group, in which case its H I properties are comparable with recently discovered ultracompact high-velocity clouds; (2) it is just behind the Local Group, in which case its optical characteristics are similar to the newly discovered Leo P galaxy; (3) it is a blue compact dwarf galaxy within the local volume but not associated with the Local Group. We find the third possibility to be the most likely, based on distance estimates from the Tully-Fisher relation and its velocity relative to the Local Group.

Abstract Copyright: © 2014 The Author Published by Oxford University Press on behalf of the Royal Astronomical Society (2014)

Journal keyword(s): surveys - galaxies: distances and redshifts - galaxies: dwarf - galaxies: evolution - galaxies: Local Group

Simbad objects: 14

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Number of rows : 14
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 12650 1
2 NAME M31 Group GrG 00 47 28.6 +40 17 23           ~ 63 0
3 NAME Andromeda XXXIII G 03 01 23.6 +40 59 18           ~ 37 0
4 NGC 2537 AG? 08 13 14.643 +45 59 23.25 12.18 12.50 11.69 11.66   ~ 301 2
5 IC 2233 LSB 08 13 58.909 +45 44 31.74 12.87 13.41 12.63 12.80   ~ 241 1
6 [MBR2014] GHOSTS I G 09 53 13.700 +69 30 02.63     20.60   19.54 ~ 2 0
7 NAME Leo P BiC 10 21 45.123 +18 05 16.89           ~ 220 0
8 NAME Local Void vid 18 38 +18.0           ~ 198 0
9 LEDA 5060431 G 19 52 11.8 +14 28 24           ~ 13 0
10 NAME Andromeda XXVIII G 22 32 41.20 +31 12 58.2     15.6     ~ 79 0
11 SDSS J225935.58+164557.2 G 22 59 35.586 +16 45 57.25           ~ 10 0
12 NGC 7448 AG? 23 00 03.589 +15 58 49.31   12.0       ~ 228 0
13 NGC 7640 GiG 23 22 06.5746017072 +40 50 43.114729056   11.6       ~ 173 0
14 NAME Local Group GrG ~ ~           ~ 8390 0

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