Improved selection criteria for H II regions, based on IRAS sources
Improved selection criteria for H II regions, based on IRAS sources
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根据 IRAS 来源改进了 H II 区域的选择标准
DOI:
10.1093/mnras/sty518
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发表时间:
2018-02
影响因子:
4.8
通讯作者:
Tang Zheng-Hong
中科院分区:
文献类型:
--
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
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.
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DOI:
10.1007/978-94-010-1211-9_33
发表时间:
1977
期刊:
--
影响因子:
--
作者:
R. Duinen
通讯作者:
R. Duinen
DOI:
10.1088/1009-9271/3/1/49
发表时间:
2003-02
期刊:
Chinese Journal of Astronomy and Astrophysics
影响因子:
--
作者:
Ye Xu;Xing-wu Zheng;D. Jiang
通讯作者:
Ye Xu;Xing-wu Zheng;D. Jiang
影响因子:
3.5
作者:
G. Garay;S. Lizano
通讯作者:
G. Garay;S. Lizano
DOI:
10.1111/j.1365-2966.2007.12379.x
发表时间:
2007-08
影响因子:
4.8
作者:
T. Murphy;T. Mauch;T. Mauch;A. Green;R. Hunstead;B. Piestrzynska;A. P. Kels;A. P. Kels;P. Sztajer
通讯作者:
T. Murphy;T. Mauch;T. Mauch;A. Green;R. Hunstead;B. Piestrzynska;A. P. Kels;A. P. Kels;P. Sztajer
影响因子:
6.5
作者:
B. A. Wilson;B. A. Wilson;T. Dame;M. Masheder;P. Thaddeus
通讯作者:
B. A. Wilson;B. A. Wilson;T. Dame;M. Masheder;P. Thaddeus