Publication Date:
2019-07-12
Description:
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.
Keywords:
ASTROPHYSICS
Type:
Astronomical Journal (ISSN 0004-6256); 98; 882-887
Format:
text
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