RMS巡天:南半球候选大质量YSO的中红外观测
The RMS Survey: Mid-Infrared Observations of Candidate Massive YSOs in the Southern Hemisphere
摘要:
摘要摘要:红色MSX源(RMS)调查是一项持续的努力,旨在返回我们银河系内大量精心挑选的大质量年轻恒星天体(MYSO)样本。目前正在进行一系列地面后续观测,以便从我们的2000个候选天体清单中删除污染天体,并开始确定这些多年期天体的特征。作为这些后续观测的一部分,高分辨率(~1”)中红外成像有助于识别已分辨的污染物(UCHII区域,PN),而不是未分辨的污染物(YSO,演化恒星),以及识别UCHII区域附近的YSO和其他多个来源。我们提出了10.4微米成像观测346个候选MYSO在RMS调查在南半球,主要是由GLIMPSE斯皮策遗产调查所涵盖的区域之外。这些都是在智利拉西拉的ESO 3.6米望远镜上使用TIMMI 2获得的。我们的测光精度为0.05Jy,天体测量精度为0.8”,比MSX PSC的标称2”精度有所提高。
英文摘要:
Abridged abstract: The Red MSX Source (RMS) survey is an ongoing effort to return a large, well-selected sample of massive young stellar objects (MYSOs) within our Galaxy. A series of ground-based follow-up observations are being undertaken in order to remove contaminant objects from our list of 2000 candidates, and to begin characterising these MYSOs. As a part of these follow-up observations, high resolution (~1") mid-IR imaging aids the identification of contaminant objects which are resolved (UCHII regions, PN) as opposed to those which are unresolved (YSOs, evolved stars) as well as identifying YSOs near UCHII regions and other multiple sources. We present 10.4 micron imaging observations for 346 candidate MYSOs in the RMS survey in the Southern Hemisphere, primarily outside the region covered by the GLIMPSE Spitzer Legacy Survey. These were obtained using TIMMI2 on the ESO 3.6m telescope in La Silla, Chile. Our photometric accuracy is of order 0.05Jy, and our astrometric accuracy is 0.8", which is an improvement over the nominal 2" accuracy of the MSX PSC.
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