Mass and age distributions of stars in young open clusters

Details Mass and age distributions of stars in young open clusters Mass and age distributions of stars in young open clusters

May 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986mnras.220..383s&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 220, May 15, 1986, p. 383-403. Research supported by th

Astronomy and Astrophysics

Astronomy

72

Mass Distribution, Open Clusters, Stellar Evolution, Stellar Mass, Chronology, Distance, Electrophotometry, Hertzsprung-Russell Diagram, Interstellar Extinction, Main Sequence Stars, Ubv Spectra

Scientific paper

Mass and age distributions of stars, based on homogeneous photoelectric UBV data and reliable cluster membership, are studied in 11 young open clusters. Stellar masses and ages are determined by fitting the theoretical stellar models to each star's position in the HR diagram by means of an interpolation procedure. The main conclusions about the mass function derived from the analysis of seven appropriate clusters are: (1) The slope of the mass spectrum of stars, x in the five young and well populated clusters is approximately the same, the average value being x = 1.4. (2) Contrary to some results on the initial mass function of field stars, no substantial increase in slope for massive stars (say, M greater than 5 solar masses) is found. (3) In general, the clusters under discussion do not show significant variations of mass function slope x with galactocentric distance, although two inner ones have a flat mass function (x = 0.85).

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