Improved selection criteria for H II regions, based on IRAS sources
文献类型：期刊论文
| 作者 | Yan, Qing-Zeng; Xu, Ye; Walsh, A. J.; Macquart, J. P.; MacLeod, G. C.; Zhang, Bo; Hancock, P. J.; Chen, Xi; Tang, Zheng-Hong |
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2018 |
| 卷号 | 476期号:3页码:3981-3990 |
| 英文摘要 | 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 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/18071]  |
| 专题 | 中国科学院紫金山天文台 |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：紫金山天文台
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