Journal article
MACHO Project Photometry of RR Lyrae Stars in the Sagittarius Dwarf Galaxy
Abstract
We report the discovery of 30 type a, b RR Lyrae (RRab) stars that are likely members of the Sagittarius dwarf galaxy (Sgr). Accurate positions, periods, amplitudes, and magnitudes are presented. Their distances are determined with respect to RRab stars in the Galactic bulge found also in the MACHO 1993 data. For R☉ = 8 kpc, the mean distance to these stars is D = 22 ± 1 kpc, smaller than previous determinations for this galaxy. This indicates …
Authors
Alcock C; Allsman RA; Alves DR; Axelrod TS; Becker AC; Bennett DP; Cook KH; Freeman KC; Griest K; Guern JA
Journal
The Astrophysical Journal, Vol. 474, No. 1, pp. 217–222
Publisher
American Astronomical Society
Publication Date
January 1997
DOI
10.1086/303467
ISSN
0004-637X