The Carina dwarf spheroidal galaxy - How dark is it?

Details The Carina dwarf spheroidal galaxy - How dark is it? The Carina dwarf spheroidal galaxy - How dark is it?

Feb 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aj....105..510m&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 105, no. 2, p. 510-526.

Astronomy and Astrophysics

Astronomy

110

Astronomical Photometry, Dwarf Galaxies, Galactic Structure, Giant Stars, Spheroids, Galactic Nuclei, Mass To Light Ratios, Radial Velocity

Scientific paper

Precise radial velocities obtained with a photon-counting echelle spectrograph for a sample of 17 red giants in the Carina dwarf spheroidal galaxy are presented. The calculation of the systemic velocity and central velocity dispersion of Carina is described, the existing data constraining the structural parameters of Carina are reviewed, and an estimate of the central surface brightness of the galaxy is derived. These data are used to estimate the central mass density of Carina, as well as central and global mass-to-light ratios. It is concluded that the inferred mass densities and mass-density limits for all acceptable models imply the presence of a significant DM component in Carina. DM properties of all well-studied dSph systems are summarized and compared.

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