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Improved selection criteria for H II regions, based on IRAS sources
Yan, Qing-Zeng; Xu, Ye; Walsh, A. J.; Macquart, J. P.; MacLeod, G. C.; Zhang, Bo; Hancock, P. J.; Chen, Xi; Tang, Zheng-Hong
2018
发表期刊MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷号476期号:3页码:3981-3990
摘要We present new criteria for selecting HII regions from the Infrared Astronomical Satellite (IRAS) Point Source Catalogue (PSC), based on an HII region catalogue derived manually from the all-sky Wide-field Infrared Survey Explorer (WISE). The criteria are used to augment the number of HII region candidates in theMilkyWay. The criteria are defined by the linear decision boundary of two samples: IRAS point sources associated with known HII regions, which serve as the HII region sample, and IRAS point sources at high Galactic latitudes, which serve as the non-H II region sample. Amachine learning classifier, specifically a support vector machine, is used to determine the decision boundary. We investigate all combinations of four IRAS bands and suggest that the optimal criterion is log (F-60/F-12) >= (-0.19 x log (F-100/F-25) + 1.52), with detections at 60 and 100 mu m. This selects 3041 HII region candidates from the IRAS PSC. We find that IRAS HII region candidates show evidence of evolution on the two-colour diagram. Merging the WISE HII catalogue with IRAS HII region candidates, we estimate a lower limit of approximately 10 200 for the number of HII regions in the Milky Way.
语种英语
WOS记录号WOS:000430944100075
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被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://libir.pmo.ac.cn/handle/332002/18071
专题紫金山天文台青海观测站
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GB/T 7714
Yan, Qing-Zeng,Xu, Ye,Walsh, A. J.,et al. Improved selection criteria for H II regions, based on IRAS sources[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2018,476(3):3981-3990.
APA Yan, Qing-Zeng.,Xu, Ye.,Walsh, A. J..,Macquart, J. P..,MacLeod, G. C..,...&Tang, Zheng-Hong.(2018).Improved selection criteria for H II regions, based on IRAS sources.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,476(3),3981-3990.
MLA Yan, Qing-Zeng,et al."Improved selection criteria for H II regions, based on IRAS sources".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 476.3(2018):3981-3990.
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