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- W2067479308 abstract "view Abstract Citations (23) References (73) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Star Formation in NGC 6531-Evidence From the age Spread and Initial Mass Function Forbes, Douglas Abstract The results of a photometric UBV study of the young open cluster NGC 6531 are presented. The cluster is found to have a mean reddening E(B-V)=0.28±0.04 (s.d.) and distance modulus (V0-Mv)=10.70±0.13 (s.e.), and 105±11 likely cluster members have been identified within the cluster coronal radius of 9 arcmin. A comparison of the high-luminosity end of the cluster color-magnitude diagram to the evolutionary models by Maeder & Meynet [A&AS, 76, 411(1988)] suggests a nuclear age of (8±2) Myr. The very clear gap in the distribution of stars with 0≤(B-V)0≤0.20, corresponding to the burn-off of 3He in stars contracting to the main sequence [Ulrich, ApJ, 168, 57 (1971)], implies a contraction age of (8±3) Myr. There would seem to be no evidence of a spread in the ages of cluster stars, as has been observed in several other young open clusters [Herbst & Miller, AJ, 87, 1478 (1982)]. The initial mass function (IMF) constructed from the cluster luminosity function and the mass-luminosity relation given by Scab (1986) shows good agreement with the field star IMF, and with the IMFS of a number of clusters of similar age and richness. The relative deficiency of low-mass stars seen by Herbst and Miller in NGC 3293 (a cluster of quite similar age and reddening) is not evident in NGC 6531. Publication: The Astronomical Journal Pub Date: September 1996 DOI: 10.1086/118079 Bibcode: 1996AJ....112.1073F Keywords: OPEN CLUSTERS AND ASSOCIATIONS: INDIVIDUAL: NGC 6531; STARS: FORMATION full text sources ADS | data products SIMBAD (413) GCPD (1)" @default.
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- W2067479308 title "Star Formation in NGC 6531-Evidence From the age Spread and Initial Mass Function" @default.
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