NEWLY IDENTIFIED EXTENDED GREEN OBJECTS (EGOs) FROM THE SPITZER GLIMPSE II SURVEY. I. CATALOG
NEWLY IDENTIFIED EXTENDED GREEN OBJECTS (EGOs) FROM THE SPITZER GLIMPSE II SURVEY. I. CATALOG
复制标题
DOI：
10.1088/0067-0049/206/1/9
复制
发表时间：
2013-05
期刊：
影响因子：
--
通讯作者：
Xi Chen;C. Gan;S. Ellingsen;Jinhua He;Zhi-qiang Shen;A. Titmarsh
中科院分区：
文献类型：
--
作者：
Xi Chen;C. Gan;S. Ellingsen;Jinhua He;Zhi-qiang Shen;A. Titmarsh
我们已经制作了一个目录，其中包含98个新发现的大质量年轻恒星天体（MYSO）候选者与正在进行的外流（称为扩展绿色对象，或EGO）。这些已经从斯皮策银河遗产红外中平面调查非凡（GLIMPSE）II数据集中识别出来，我们的新识别将我们银河系中已知的EGO数量增加到100400个，增加到Cyganowski等人之前报告的100300个EGO。高检测率（1070%）的95 GHz的I类甲醇脉泽实现了对57个这些新的EGO与Mopra 22米射电望远镜的调查表明，新的EGO与外流。研究中红外特性以及与其他星星形成示踪剂的物理关联（例如，红外暗云、I类和II类甲醇脉泽和毫米波Bolocam银道巡天来源）表明，新发现的EGO在性质上与Cyganowski等人的样本非常相似。所有观测证据都支持EGO对应于最早演化阶段的MYSO的假设，具有持续的外流活动和活跃的快速吸积。
We have produced a catalog containing 98 newly identified massive young stellar object (MYSO) candidates associated with ongoing outflows (known as extended green objects, or EGOs). These have been identified from the Spitzer Galactic Legacy Infrared Mid-Plane Survey Extraordinaire (GLIMPSE) II data set and our new identifications increase the number of known EGOs to ∼400 in our Galaxy, adding to the ∼300 previously identified EGOs reported by Cyganowski et al. from the GLIMPSE I survey. The high detection rate (∼70%) of 95 GHz class I methanol masers achieved in a survey toward 57 of these new EGOs with the Mopra 22 m radio telescope demonstrates that the new EGOs are associated with outflows. Investigations of the mid-infrared properties and physical associations with other star formation tracers (e.g., infrared dark clouds, class I and II methanol masers, and millimeter Bolocam Galactic Plane Survey sources) reveal that the newly identified EGOs are very similar in nature to those in the sample of Cyganowski et al. All of the observational evidence supports the hypothesis that EGOs correspond to MYSOs at the earliest evolutionary stage, with ongoing outflow activity, and active rapid accretion.