The stellar content of the Sagittarius Dwarf Galaxy

Details The stellar content of the Sagittarius Dwarf Galaxy The stellar content of the Sagittarius Dwarf Galaxy

1997-03-12

arxiv.org/abs/astro-ph/9703081v1

Astronomy and Astrophysics

Astrophysics

10 pages, Tex, 12 figures, submitted to "Astronomy and Astrophysics", Main Journal

Scientific paper

We present V,I deep CCD photometry for three fields of the dwarf galaxy in Sagittarius (Sgr). One of the fields is centered on the globular cluster NGC 6715 (M54), which lies in one of the dense clumps of the Sgr galaxy. Comparing the CMD of Sgr with those of globular clusters which are believed to be kinematically associated with the dwarf galaxy, we conclude that the stellar population of Sgr presents a spread in metallicity, and that the dominant population (about 10 Gyr old) is extremely similar to the star content of the associated globular cluster Terzan 7. The estimated distance to Sgr is about d=24.55 Kpc.

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