천문학회보 (The Bulletin of The Korean Astronomical Society)
- 제41권2호
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- Pages.43.1-43.1
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- 2016
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- 1226-2692(pISSN)
The Formation Timescale of the Young Open Cluster NGC 2264: Implication on the Lithium Abundance Distribution of Pre-Main Sequence Stars
- Lim, Beomdu (Korea Astronomy & Space Science Institute) ;
- Sung, Hwankyung (Sejong University) ;
- Kim, Jinyoung S. (Steward Observatory) ;
- Bessell, Michael S. (RSAA, Australian National University) ;
- Hwang, Narae (Korea Astronomy & Space Science Institute) ;
- Park, Byeong-Gon (Korea Astronomy & Space Science Institute)
- 발행 : 2016.10.12
초록
The duration of star formation activity is a key to understanding the formation process of star clusters. Although a number of astronomers have attempted to derive the underlying age spread in photometric diagrams with a variety of stellar evolutionary models, the resultant findings are subject to uncertainties due to intrinsic variability of pre-main sequence (PMS) stars, observational errors, difficulties in reddening correction, and systematic differences in adopted stellar evolutionary models. The distribution of Li abundance for PMS stars in a cluster could, on the other hand, provide an alternative way to estimate the age spread. In this study, a total of 134 PMS stars in NGC 2264 are observed with the high resolution multi-object spectrogragh Hectochelle attached to the 6.5m Multi Mirror Telescope. We have successfully detected Li
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