Published September 1989
| Version v1
Journal article
A color gradient in the globular cluster M15
Creators
- 1. Dominion Astrophysical Observatory, Victoria (Canada)
- 2. Indiana Univ., Bloomington (USA)
- 3. Harvard-Smithsonian Center for Astrophysics, Cambridge, MA (USA)
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. 20 refs
Additional details
Publishing Information
- Journal Title
- Astronomical Journal
- Journal Volume
- 98
- Series
- Astron. J.
- Journal Page Range
- 882-887
- ISSN
- 0004-6256
- CODEN
- ANJOA
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 21021820
- Subject category
- S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
- Descriptors DEI
- COLOR; ERUPTIVE VARIABLE STARS; GRAVITATIONAL COLLAPSE; MAPS; SPATIAL DISTRIBUTION; STAR CLUSTERS; STAR MODELS; ULTRAVIOLET RADIATION
- Descriptors DEC
- BINARY STARS; DISTRIBUTION; ELECTROMAGNETIC RADIATION; MATHEMATICAL MODELS; OPTICAL PROPERTIES; ORGANOLEPTIC PROPERTIES; PHYSICAL PROPERTIES; RADIATIONS; STARS; VARIABLE STARS