论文标题
恒星形成区域NGC2264的棕色矮人种群
The brown dwarf population in the star forming region NGC2264
论文作者
论文摘要
迄今为止，探索量很少，在规范恒星形成区域NGC2264中的棕色矮人人口。我们提出了对恒星形成群集NGC2264的深度，多波长的多个多个调查，旨在鉴定该地区的年轻棕色矮人候选者。使用包括光学/近红外颜色的标准，可变性，中红外颜色过量，灭绝和Gaia视差以及适当的运动（按相关顺序），我们选择了902个带有青年指标的微弱红色源。在此样本中，我们根据其红外颜色识别429个棕色矮人候选者。据估计，棕色矮人的候选者的质量范围为0.01至0.08 $ m _ {\ odot} $。我们发现44个来源的旋转周期，其中15个是棕色矮人候选人，范围从3.6小时到6.5天。 38个棕色矮人候选者的子集显示出高水平的不规则变异性，表明持续的椎间盘积聚，类似于年轻恒星的行为。
The brown dwarf population in the canonical star forming region NGC2264 is so far poorly explored. We present a deep, multi-wavelength, multi-epoch survey of the star forming cluster NGC2264, aimed to identify young brown dwarf candidates in this region. Using criteria including optical/near-infrared colours, variability, Spitzer mid-infrared colour excess, extinction, and Gaia parallax and proper motion (in order of relevance), we select 902 faint red sources with indicators of youth. Within this sample we identify 429 brown dwarf candidates based on their infrared colours. The brown dwarf candidates are estimated to span a mass range from 0.01 to 0.08$M_{\odot}$. We find rotation periods for 44 sources, 15 of which are brown dwarf candidates, ranging from 3.6 hours to 6.5 days. A subset of 38 brown dwarf candidates show high level irregular variability indicative of ongoing disc accretion, similar to the behaviour of young stars.
