The abundances and velocities of the Leo dwarf spheroidals

Details The abundances and velocities of the Leo dwarf spheroidals The abundances and velocities of the Leo dwarf spheroidals

May 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986aj.....91.1091s&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 91, May 1986, p. 1091-1095.

Astronomy and Astrophysics

Astronomy

27

Abundance, Dwarf Galaxies, Galactic Structure, Radial Velocity, Astronomical Spectroscopy, Calcium, Data Reduction, Line Spectra, Magnesium, Spheroids

Scientific paper

Moderate (6 Å) resolution spectra obtained with the Multiple Mirror Telescope are reported for two red giants in the Leo I dwarf spheroidal galaxy and three giants in the Leo II dwarf. The calcium and magnesium line strengths imply mean metallicities of -1.9±0.2 dex for Leo II and -1.5±0.25 dex for Leo I, values that support the existence of an abundance/absolute-magnitude relation that extends smoothly through the lowest-luminosity early-type galaxies. The radial velocities derived from the spectra are in good agreement with earlier measurements based on carbon stars. The authors also report the first measured velocity for the Galactic globular NGC 5053.

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