THE STAR-FORMATION HISTORY OF LGS-3

Authors
MOULD J
Citation
J. Mould, THE STAR-FORMATION HISTORY OF LGS-3, Publications of the Astronomical Society of the Pacific, 109(732), 1997, pp. 125-129
Citations number
22
Categorie Soggetti
Astronomy & Astrophysics
Journal title
Publications of the Astronomical Society of the Pacific
ISSN journal
00046280 → ACNP
Volume
109
Issue
732
Year of publication
1997
Pages
125 - 129
Database
ISI
SICI code
0004-6280(1997)109:732<125:TSHOL>2.0.ZU;2-J
Abstract
LGS 3 presents the optical appearance of a dwarf spheroidal galaxy, bu t has a significant neutral hydrogen component. Photometry of its brig htest stars with COSMIC at the prime focus of the Hale telescope shows a 10(8)-yr-old population and a 10(10)-yr-old population. Either we a re seeing a recent burst of star formation in a dwarf spheroidal galax y, or, if intermediate-age populations are also present, we are witnes sing a recent transition from a dwarf irregular to a dwarf spheroidal galaxy.