The Distance to the Sgr dwarf spheroidal galaxy from the Red Giant Branch Tip - INSPIRE

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The Distance to the Sgr dwarf spheroidal galaxy from the Red Giant Branch Tip

Lorenzo Monaco
(
- Trieste Observ. and
- Bologna Observ. and
- Bologna U.
)
,
M. Bellazzini
(
- Bologna Observ.
)
,
F.R. Ferraro
(
- Bologna U.
)
,
E. Pancino
(
- Bologna Observ.
)

Jun, 2004

6 pages

Published in:

Mon.Not.Roy.Astron.Soc. 353 (2004) 874

e-Print:

astro-ph/0406350 [astro-ph]

DOI:

10.1111/j.1365-2966.2004.08122.x

View in:

ADS Abstract Service

reference search35 citations

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Abstract: (arXiv)

We derived the distance to the central region of the Sagittarius dwarf spheroidal galaxy from the Red Giant Branch Tip. The obtained distance modulus is

(m-M)_0=17.10\pm0.15

, corresponding to a heliocentric distance

D=26.30\pm1.8

Kpc. This estimate is in good agreement with the distance obtained from RR Lyrae 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(RRLy) vs.[Fe/H]

relation are adopted.

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