The Bulletin of The Korean Astronomical Society (천문학회보)
- Volume 45 Issue 1
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- Pages.50.3-50.3
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- 2020
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- 1226-2692(pISSN)
Sejong Open cluster Survey (SOS). VII. A Photometric Study of the Young Open Cluster IC 1590
- Kim, Seulgi (Department of astronomy and space science, Sejong University) ;
- Sung, Hwangyung (Department of astronomy and space science, Sejong University) ;
- Bessell, Michael S. (Research School of Astronomy & Astrophysics, The Australian National University) ;
- Lim, Beomdu (School of Space Research, Kyung Hee University)
- Published : 2020.10.13
Abstract
We present deep UBVIc and Hα photometry for the young open cluster IC 1590 which is at the center of the HII region NGC 281. From Ha index, 39 Hα emission stars and 15 Hα emission candidates are selected. The reddening law toward IC 1590 is slightly abnormal (RV,cl = 3.6 ± 0.2). The distance modulus of IC 1590 obtained from the reddening-free (Q', QVλ) diagrams is 12.4 ± 0.1 mag (d = 3.02 ± 0.14 kpc), which is consistent with distance d = 2.91 ± 0.42 kpc from the parallax of Gaia DR2 catalogue within the error range. We also determined the age and mass function of IC 1590 using the stellar evolution models and PMS evolutionary tracks. The median age of PMS stars is 2.4 ± 2.2 Myr. The initial mass function (IMF) of IC 1590 is the Salpeter-type IMF with a slope of �� = -1.26 ± 0.14 for m > 1 M⊙ stars.
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