Open AccessThe distance to the Sagittarius dwarf spheroidal galaxy from the red giant branch tip
Author(s) -
Monaco L.,
Bellazzini M.,
Ferraro F.R.,
Pancino E.
Publication year - 2004
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1111/j.1365-2966.2004.08122.x
Subject(s) - physics , sagittarius , rr lyrae variable , globular cluster , astrophysics , dwarf spheroidal galaxy , distance modulus , dwarf galaxy , red giant branch , horizontal branch , galaxy , astronomy , metallicity , giant star , stars , interacting galaxy
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 M 54, 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.