论文标题
处女座集群中的年轻，蓝色和孤立的恒星系统。 I. 2-D光谱
Young, blue, and isolated stellar systems in the Virgo Cluster. I. 2-D Optical spectroscopy
论文作者
论文摘要
我们使用使用Muse@VLT获得的全景光谱来研究五名候选者的性质极为孤立的低质量星形成区域（蓝色候选者，BCS，以下内容）朝着处女座星系群。发现五个（BC1，BC3，BC4，BC5）中有四个容纳多个HII区域，并且具有与处女座簇的一部分完全兼容的径向速度。所有确认的候选者具有平均金属性的显着超过其恒星质量的预期，这表明它们源自从较大星系中剥离的气体。总而言之，这四个候选人具有SECCO原型系统的特性，这表明可能出现了一类新的恒星系统，与星系簇中气体的复杂占空比密切相关。关于这些物体的性质和演变的详尽讨论在同伴论文中介绍，其中从MUSE数据中获得的结果与Hubble Space望远镜（光学）和非常大的阵列（HI）观测值相辅相成。
We use panoramic optical spectroscopy obtained with MUSE@VLT to investigate the nature of five candidate extremely isolated low-mass star forming regions (Blue Candidates, BCs hereafter) toward the Virgo cluster of galaxies. Four of the five (BC1, BC3, BC4, BC5) are found to host several HII regions and to have radial velocities fully compatible with being part of the Virgo cluster. All the confirmed candidates have mean metallicity significantly in excess of that expected from their stellar mass, indicating that they originated from gas stripped from larger galaxies. In summary, these four candidates share the properties of the prototype system SECCO 1, suggesting the possible emergence of a new class of stellar systems, intimately linked to the complex duty cycle of gas within clusters of galaxies. A thorough discussion on the nature and evolution of these objects is presented in a companion paper, where the results obtained here from MUSE data are complemented with Hubble Space Telescope (optical) and Very Large Array (HI) observations.
