文章基本信息

标题：Characterizing the Stellar Population of NGC 1980
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作者：Marina Kounkel ; Lee Hartmann ; Nuria Calvet 等
期刊名称：The Astronomical journal
印刷版ISSN：0004-6256
电子版ISSN：1538-3881
出版年度：2017
卷号：154
期号：1
页码：1-13
DOI：10.3847/1538-3881/aa74df
语种：English
出版社：American Institute of Physics
摘要：NGC 1980 is a young cluster that is located about 05 south of the Orion Nebula Cluster (ONC). Recent studies by Bouy et al. and Pillitteri et al. have suggested that NGC 1980 contains an older population of stars compared to a much younger ONC, and that it belongs to a foreground population that may be located in front of the Orion A molecular gas by as much as 40 pc. In this work, we present low-resolution spectra toward 148 young stars found toward the NGC 1980 region. We determine the spectral types of these stars, examine accretion signatures and measure the extinction toward them. We determine that based on these observations, the age of the population of NGC 1980 is indistinguishable from L1641, estimated to be ~3 Myr, comparable with the study by Fang et al.
关键词：ISM: individual objects (NGC 1980) ; stars: pre;main sequence