Statistics – Computation
Scientific paper
Oct 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987pasp...99.1050p&link_type=abstract
Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 99, Oct. 1987, p. 1050-1066. Research supported by Brig
Statistics
Computation
72
Astrometry, Astronomical Spectroscopy, Computational Astrophysics, Galactic Evolution, Open Clusters, Astronomical Photometry, B Stars, Data Reduction, Near Infrared Radiation, Stellar Color
Scientific paper
A new determination of the distances of the young open clusters NGC 2244 and NGC 2264 is presented. It is based on distance moduli for individual OB-type stars in which the influence of the anomalous ratio of total to selective extinction, if any, is taken into account. A discussion is included, first, of the accuracy of the color-difference method compared to that of other current methods for determining R and, second, of the errors in the determination of the distances for clusters embedded in nonuniform H II regions. New photoelectric measurements (UBVRI and JHKLM), and new spectrophotometric data (IDS spectra) are presented for OB-type stars in these clusters as well as summaries of published photometric data. The locations in the H-R diagram of the program stars seem to suggest that these massive stars are on the main sequence, supporting the idea of continuous star formation.
Perez Mario R.
Thé Pik-Sin
Westerlund Bengt E.
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