Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989aj.....98..882b&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 98, Sept. 1989, p. 882-887. Research supported by Harvard Society of Fellows.
Astronomy and Astrophysics
Astronomy
36
Astronomical Maps, Globular Clusters, Star Distribution, Stellar Color, Ultraviolet Astronomy, Astronomical Models, Blue Stars, Cataclysmic Variables, Color-Magnitude Diagram, Gravitational Collapse
Scientific paper
A U-B color map of the central regions of the globular cluster M15 is constructed from data taken at the CFHT in subarcsec seeing. Analysis of the color distribution of the pixels in this map unambiguously demonstrates that the area within 6.6 arcsec of the center of the cluster is bluer than surrounding regions. The difference is apparently caused by a population of faint blue stars more prevalent in the core than elsewhere, and is consistent with post-core-collapse models which predict a centrally condensed distribution of cataclysmic variables.
Bailyn Charles D.
Cohn Henry
Grindlay Jonathon E.
Hesser James Edward
Lugger Phyllis Minnie
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