Field color magnitude diagram analysis along the bulge major axis

Details Field color magnitude diagram analysis along the bulge major axis Field color magnitude diagram analysis along the bulge major axis

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...408l..29o&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 408, no. 1, p. L29-L32.

Astronomy and Astrophysics

Astrophysics

13

Color-Magnitude Diagram, Galactic Bulge, Galactic Structure, Blue Stars, Star Distribution

Scientific paper

We analyze background fields along the bulge major axis away from the Galactic center by 2.5, 13, and 31 deg. Our aim is to study the spatial distribution of different stellar populations. A similar component of young disk main-sequence population is present in all fields. The bulge component prevails in the innermost field, decreases for the 13-deg one, and is essentially absent in the 31-deg one. Evidence for a weak old metal-poor component is seen in the three fields. In the 13-deg field we detect a peculiar new feature which could be interpreted as an intermediate-age component, and traces of this population in the 2.5-deg field are also found. This might be an old disk component.

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