2011AJ....141..106J

Query : 2011AJ....141..106J

2011AJ....141..106J - Astron. J., 141, 106 (2011/April-0)

The star formation history of isolated dwarf UGC 4879.

JACOBS B.A., TULLY R.B., RIZZI L., KARACHENTSEV I.D., CHIBOUCAS K. and HELD E.V.

Abstract (from CDS):

Recent observations of UGC 4879 with the Advanced Camera for Surveys on the Hubble Space Telescope confirm that it is a nearby isolated dwarf irregular galaxy. We measure a distance of 1.36±0.03 Mpc using the tip of the red giant branch method. This distance puts UGC 4879 beyond the radius of first turnaround of the Local Group and ∼700 kpc from its nearest neighbor Leo A. This isolation makes this galaxy an ideal laboratory for studying pristine star formation uncomplicated by interactions with other galaxies. We present the star formation history of UGC 4879 derived from simulated color-magnitude diagrams.

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Journal keyword(s): galaxies: distances and redshifts - galaxies: dwarf - galaxies: individual: UGC 4879 (VV124) - galaxies: stellar content

Simbad objects: 9

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Number of rows : 9
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 IC 342 AGN 03 46 48.514 +68 05 45.98   10.5       ~ 1579 1
3 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
4 Z 264-88 AG? 09 16 02.0195908968 +52 50 42.051257412   14.0 13.2     ~ 141 0
5 M 81 Sy2 09 55 33.1726556496 +69 03 55.062505368   7.89 6.94     ~ 4725 3
6 Z 153-10 G 09 59 26.46 +30 44 47.0 14.08 13.54 13.26 13.33   ~ 652 0
7 LEDA 2801026 LSB 16 13 47.504 +54 22 08.25     15.9     ~ 115 0
8 NAME Tuc Galaxy G 22 41 49.6 -64 25 10   15.7 15.2     ~ 324 0
9 NAME Local Group GrG ~ ~           ~ 9325 0

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