The evolution of the luminosity function of young open clusters

Kuo chun Kao, Wen ping Chen, Jing yao Hu

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Abstract The luminosity function of a star cluster evolves markedly during the pre-main sequence phase. With an assumed initial mass function and premain sequence tracks, we calculate a set of monochromatic luminosity functions which, when compared with observations, can be used to infer the age and star formation history (coeval versus intermittent) of a star cluster. Applied to the Trapezium cluster, our model suggests an age close to a million years, whereas in IC 348 the age estimate yields 4-6 million years and continual bursts of star formation seem to have occurred in this cluster, CCD imaging observations in the I-band are presented for NGC 663, for which an age of 10-30 million years is inferred. The initial mass function for NGC 663 in the range 2-7.1 M has a slope of -0.77 ± 0.20, much shallower than that for the solar neighborhood field stars. We interpret this being due to mass segregation in the cluster. We interpret this as being due to mass segregation in the cluster.

Original languageEnglish
Pages (from-to)62-68
Number of pages7
JournalChinese Astronomy and Astrophysics
Volume22
Issue number1
DOIs
StatePublished - 1998

Keywords

  • Luminosity function
  • Stars
  • Young star cluster

Fingerprint

Dive into the research topics of 'The evolution of the luminosity function of young open clusters'. Together they form a unique fingerprint.

Cite this