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

2; (2) INAF - Osservatorio Astronomico di Bologna; 3); (3) Universit\`a di Bologna); E. Pancino (2) ((1) INAF - Osservatorio Astronomico di Trieste; F.R. Ferraro (3); L. Monaco (1; M. Bellazzini (2)

arxiv: astro-ph/0406350 · v1 · submitted 2004-06-15 · 🌌 astro-ph

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

L. Monaco (1 , 2 , 3) , M. Bellazzini (2) , F.R. Ferraro (3) , E. Pancino (2) ((1) INAF - Osservatorio Astronomico di Trieste , (2) INAF - Osservatorio Astronomico di Bologna , (3) Universit\`a di Bologna) This is my paper

classification 🌌 astro-ph

keywords distancegalaxybranchclusterdwarfestimategiantobtained

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

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