ERRATUM: “A UNIVERSAL MASS PROFILE FOR DWARF SPHEROIDAL GALAXIES?” (2009, ApJ, 704, 1274)

A Universal Mass Profile for Dwarf Spheroidal Galaxies?

We apply the Jeans equation to estimate masses for eight of the brightest dwarf spheroidal (dSph) galaxies. For Fornax, the dSph with the largest kinematic data set, we obtain a model-independent constraint on the maximum-circular velocity, Vmax = 20 +4 −3 km s . Although we obtain only lowerlimits of Vmax & 10 km s −1 for the remaining dSphs, we find that in all cases the enclosed mass at the ...

Dwarf Spheroidal Galaxies

Search for HI in Dwarf Spheroidal Galaxies

After reviewing the HI content and distribution in extreme dwarf irregular (dIrr) and dwarf elliptical (dE) galaxies, previous searches for HI in dwarf spheroidal (dSph) galaxies will be discussed. I will report on the recent detections of HI probably associated with the Local Group (LG) dSph Sculptor and dIrr/dSph Phoenix, obtained with the ATCA, along with a similar detection in the Centaurus...

The Universal Stellar Mass–stellar Metallicity Relation for Dwarf Galaxies

We present spectroscopic metallicities of individual stars in seven gas-rich dwarf irregular galaxies (dIrrs), and we show that dIrrs obey the same mass–metallicity relation as the dwarf spheroidal (dSph) satellites of both the Milky Way and M31: Z∗ ∝ M 0.30±0.02 ∗ . The uniformity of the relation is in contradiction to previous estimates of metallicity based on photometry. This relationship is...

Internal Kinematics of Dwarf Spheroidal Galaxies

We discuss the quality of kinematic data in dwarf spheroidal galaxies, the current interpretations of those data, and prospects for actually deriving the mass profile in these galaxies. We then discuss stellar populations constraints on some of the models that attempt to explain the kinematics and formation of the dSph’s.