arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1003.0866astro-ph.GA
收藏

狐狸座OB星协中的年轻天体和触发恒星形成

Young Stellar Objects and Triggered Star Formation in the Vulpecula OB Association

N. Billot, A. Noriega-Crespo, S. Carey, S. Guieu, S. Shenoy, R. Paladini, W. Latter

摘要:

狐狸座OB星协,VulOB 1,是一个活跃的恒星形成区,位于银河平面,距离太阳2.3千秒差距。先前的研究表明,连续的恒星形成是沿着这个100 pc长的分子复合体传播的。本文利用Spitzer MIPSGAL和GLIMPSE数据重建了VulOB 1的恒星形成历史,并寻找过去触发事件的特征。我们根据红外颜色和星等标准对VulOB 1中的年轻恒星天体(YSO)进行了普查,我们依靠这些YSO的性质和性质来追踪最近的大质量恒星形成事件。我们发现了856个YSO候选者,并表明VulOB 1中YSO人口的进化阶段是相当均匀的-排除了传播恒星形成的情况。我们估计目前的恒星形成效率约为8%。我们还报告了十几个柱状结构的发现,这些结构被证实是小规模触发恒星形成的场所。

英文摘要:

The Vulpecula OB association, VulOB1, is a region of active star formation located in the Galactic plane at 2.3 kpc from the Sun. Previous studies suggest that sequential star formation is propagating along this 100 pc long molecular complex. In this paper, we use Spitzer MIPSGAL and GLIMPSE data to reconstruct the star formation history of VulOB1, and search for signatures of past triggering events. We make a census of Young Stellar Objects (YSO) in VulOB1 based on IR color and magnitude criteria, and we rely on the properties and nature of these YSOs to trace recent episodes of massive star formation. We find 856 YSO candidates, and show that the evolutionary stage of the YSO population in VulOB1 is rather homogeneous - ruling out the scenario of propagating star formation. We estimate the current star formation efficiency to be ~8 %. We also report the discovery of a dozen pillar-like structures, which are confirmed to be sites of small scale triggered star formation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑