The Sagittarius dwarf mass-to-light ratio
Abstract
We report on the use of high-resolution spectra to obtain a detailed description of the Sagittarius dwarf spheroidal internal dynamics, its Mass and Mass to Light ratio (M/L). Our direct measure of the central velocity dispersion of SGR give σSGR=8.1±0.4 km/s which translates in a total mass estimate of MSGR =1.6×108 M⊙ and corresponding (M/L)SGR=9.1 (M/L)⊙. We also report on a possible detection of rotation in the core of SGR.
- Publication:
-
IAU Colloq. 198: Near-fields cosmology with dwarf elliptical galaxies
- Pub Date:
- 2005
- DOI:
- 10.1017/S174392130500356X
- Bibcode:
- 2005nfcd.conf..101Z