Showing papers by "William E. Harris published in 1980"
TL;DR: In this paper, UBVRI photoelectric photometry and MK-spectral specifications are presented for a large number of stars in this cluster and its surroundings (Car OB1), over 70 cluster members with spectral types earlier than B9 are identified.
Abstract: On the basis of visible evidence, NGC 3293 appears to be associated with a number of objects in the Carina Nebula complex. UBVRI photoelectric photometry and MK-spectral specifications are presented for a large number of stars in this cluster and its surroundings (Car OB1). Over 70 cluster members with spectral types earlier than B9 are identified. Star counts indicate that the expected number of members brighter than V = 18 is 297 plus or minus 9. The cluster appears to be situated just in front of a dense dust lane, which itself appears to be part of the dust complex emanating from the center of the Carina Nebula.
41 citations
TL;DR: In this paper, photoelectric and photographic color-magnitude photometry to V 22 is presented for the globular cluster Palomar 12, which most closely resembles 47 Tucanae and all combined evidence suggests that Pal 12 is a moderately metal-rich cluster in agreement with the recent red-giant abundance studies by Cohen.
Abstract: New photoelectric and photographic color-magnitude photometry to V 22 is presented for the globular cluster Palomar 12. The C-M diagram morphology most closely resembles 47 Tucanae, and all combined evidence suggests that Pal 12 is a moderately metal-rich cluster in agreement with the recent red-giant abundance studies by Cohen. A preliminary age estimate of 11 billion years for Pal 12 by fitting our main-sequence data to the Yale isochrones in the (Mv, B - V)-plane is described.
9 citations
TL;DR: The distance and structural properties of the remote anticenter globular cluster Palomar 2 were deduced from a preliminary analysis of a deep V photographic plate of the cluster as discussed by the authors.
Abstract: The distance and structural properties of the remote anticenter globular cluster Palomar 2 are deduced from a preliminary analysis of a deep V photographic plate of the cluster. Its apparent distance modulus is estimated to be (n - M)V = 20.1 plus or minus 0.4 with a heavy foreground reddening E(B - V) = 1.27 plus or minus 0.07, and hence a galactocentric distance of 26 kpc. New star counts from the plate material are made to derive its tidal radius and central concentration parameters, and thus an approximate value for its perigalactic distance. Palomar 2 is much more compact than other clusters at similar distances, suggesting that it is now being seen near the outer end of a highly eccentric (e greater than 0.8) orbit.
4 citations