期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 353, 期 3, 页码 874-878出版社
OXFORD UNIV PRESS
DOI: 10.1111/j.1365-2966.2004.08122.x
关键词
stars : Population II; galaxies : distances and redshifts; Local Group
We derived the distance to the central region of the Sagittarius (Sgr) dwarf spheroidal galaxy from the red giant branch tip. The obtained distance modulus is (m - M)(0) = 17.10 +/- 0.15, corresponding to a heliocentric distance D = 26.30 +/- 1.8 Kpc. This estimate is in good agreement with the distance obtained from RR Lyrae (RR Ly) stars of the globular cluster M54, located in the core of the Sgr galaxy, once the most accurate estimate of the cluster metallicity and the most recent calibration of the M-V(RR Ly) versus [Fe/H] relation are adopted.
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