Photometric abundances of Type II Cepheid variables

Details Photometric abundances of Type II Cepheid variables Photometric abundances of Type II Cepheid variables

May 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981aj.....86..719h&link_type=abstract

Astronomical Journal, vol. 86, May 1981, p. 719-729.

Astronomy and Astrophysics

Astronomy

50

Abundance, Cepheid Variables, Heavy Elements, Metallic Stars, Stellar Spectrophotometry, Astrometry, Distance, Galactic Structure, Halos, Red Shift, Star Distribution, Stellar Evolution, Stellar Luminosity, Stellar Magnitude

Scientific paper

Washington-system colors and V magnitudes of 63 Type II Cepheids are used to investigate the distribution of metal abundances in these stars and correlations of their abundances with position in the Galaxy. Only a small fraction of Cepheids in the field represent a true halo population; most have characteristics of a transition population between the halo and the disk. The origin of the metal-rich stars and their relation to the metal-rich RR Lyraes is discussed. The abundance distribution of all Type II Cepheids shows no strong dependence on distance from the galactic center.

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