IOP Publishing Ltd.;United States: American Astronomical Society
摘要:
摘要： We present optical photometric and polarimetric observations of stars toward NGC 1931 with the aim of deriving cluster parameters such as distance, reddening, age, and luminosity/mass function as well as understanding dust properties and star formation in the region. The stellar density contours reveal two clusters in the region. The observations suggest a differing reddening law within the cluster region. Polarization efficiency of the dust grains toward the direction of the cluster is found to be less than that for the general diffuse interstellar medium (ISM). The slope of the mass function (-0.98 + or - 0.22) in the southern region in the mass range of 0.8 < M/M sub([middot in circle]) < 9.8 is found to be shallower in comparison to that in the northern region (-1.26 + or - 0.23), which is comparable to the Salpeter value (-1.35). The morphology of the region, the distribution and ages of the YSOs, and ionizing sources indicate a triggered star formation in the region. 出版者： United States: American Astronomical Society 出版日期： 2013-02-20 出處： The Astrophysical Journal, 2013-02, Vol.764 (2), p.172--24 資源來源： Institute of Physics Journals 版權： licence_http://creativecommons.org/publicdomain/zero 識別號： ISSN: 0004-637X 識別號： ISSN: 1538-4357 識別號： EISSN: 1538-4357 識別號： DOI: 10.1088/0004-637x/764/2/172
