Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987pasp...99..173h&link_type=abstract
Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 99, March 1987, p. 173-178.
Astronomy and Astrophysics
Astronomy
17
Andromeda Galaxy, B Stars, Early Stars, O Stars, Star Clusters, Stellar Spectrophotometry, Ubv Spectra, Color-Magnitude Diagram, Faint Objects, Galactic Clusters, Magellanic Clouds, Stellar Luminosity
Scientific paper
Integrated UBVR photometry is given for a selection of young star clusters and compact OB associations in M31. Most are very young and, except for those in the outer parts of the galaxy, most show significant reddening. The brightest have absolute magnitudes of Mv = -8.0 and very blue colors. Clusters in this sample also include objects as faint as Mv = -3.7. The oldest disk clusters in the sample have ages, estimated from their colors, of approximately 4×108years, and the youngest are only a few million years old. Comparison of the cluster luminosity function with that of the LMC suggests that present sampling of M31 disk clusters is very incomplete; there probably are at least 10,000 such clusters still undetected.
Geisler Doug
Hodge Paul W.
Lee Myung Gyoon
Mateo Mario
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