论文标题
带有年轻过渡磁盘的猎户座星云群的低质量成员的积聚
Accretion in low-mass members of the Orion Nebula Cluster with young transition disks
论文作者
论文摘要
尽管猎户座星云群是太阳能社区中研究最多的集群之一，但由于它们的昏暗，尚未完全解决非常低质量成员（$ m_* <0.25 \，m_ \ odot $）的演变。我们的目标是验证猎户座星云集群中的一些年轻且非常低的物体是否显示出使用宽带VLT/X-Shooter Spectra持续积聚的证据。对于每个目标，我们确定了相应的恒星参数，面纱，观察到的Balmer跳跃和增生率。此外，我们通过可用的在线光度法搜索了异形磁盘的存在。我们在猎户座星云群的三个年轻恒星物体中检测到积聚活性，其中两个处于非常低的质量范围。我们还发现了年龄在1至3.5 Myr之间的年轻过渡磁盘的存在。
Although the Orion Nebula Cluster is one of the most studied clusters in the solar neighborhood, the evolution of the very low-mass members ($M_* < 0.25 \, M_\odot$) has not been fully addressed due to their faintness. Our goal is to verify if some young and very low-mass objects in the Orion Nebula Cluster show evidence of ongoing accretion using broadband VLT/X-Shooter spectra. For each target, we determined the corresponding stellar parameters, veiling, observed Balmer jump, and accretion rates. Additionally, we searched for the existence of circumstellar disks through available on-line photometry. We detected accretion activity in three young stellar objects in the Orion Nebula Cluster, two of them being in the very low-mass range. We also detected the presence of young transition disks with ages between 1 and 3.5 Myr.
