Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...334..657b&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 334, Nov. 15, 1988, p. 657-664.
Astronomy and Astrophysics
Astronomy
14
Astronomical Photometry, Globular Clusters, Open Clusters, Spaceborne Astronomy, Ultraviolet Astronomy, Emission Spectra, Galactic Clusters, Main Sequence Stars, Rocket-Borne Instruments, Star Formation
Scientific paper
From images obtained by a rocket-borne ultraviolet imaging telescope, near-UV (≡2700 Å) fluxes are determined for 17 sources in M31 that are optical globular-cluster candidates and for the bright open cluster vdB0 (Hodge cluster 107) in M31. Far-UV (≡1500 Å) fluxes or flux limits are determined for the same clusters. The resulting mNUV - V and mFUV - V colors are compared with those of Galactic clusters. Four of the detected clusters have colors indicating ages ≡108yr, which are much less than those of typical Galactic globular clusters. These four clusters are probably similar to the so-called "blue globular" clusters of the LMC. The existence of young LMC-type blue globulars may indicate that M31 has continued to form globular clusters throughout its life.
Bohlin Ralph Charles
Cornett Robert H.
Hill Jesse K.
Hill Robert S.
Stecher Theodore P.
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