A SiO J=5 → 4 Survey Toward Massive Star Formation Regions

被引：26

作者：

Li, Shanghuo ^{[1
,2
,3
]}

Wang, Junzhi ^{[1
,4
]}

Fang, Min ^{[5
,6
]}

Zhang, Qizhou ^{[2
]}

Li, Fei ^{[1
,3
]}

Zhang, Zhi-Yu ^{[7
,8
]}

Li, Juan ^{[1
]}

Zhu, Qingfeng ^{[9
]}

Zeng, Shaoshan ^{[10
]}

机构：

[1] Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China

[2] Ctr Astrophys Harvard & Smithsonian, 60 Garden St, Cambridge, MA 02138 USA

[3] Univ Chinese Acad Sci, 19A Yuquanlu, Beijing 100049, Peoples R China

[4] Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Jiangsu, Peoples R China

[5] Univ Arizona, Dept Astron, 933 N Cherry Ave, Tucson, AZ 85721 USA

[6] Univ Arizona, Steward Observ, 933 N Cherry Ave, Tucson, AZ 85721 USA

[7] Univ Edinburgh, Inst Astron, Blackford Hill, Edinburgh EH9 3HJ, Midlothian, Scotland

[8] European Southern Observ, Karl Schwarzschild Str 2, D-85748 Garching, Germany

[9] Univ Sci & Technol, Chinese Acad Sci, Astron Dept, Hefei 210008, Anhui, Peoples R China

[10] Queen Mary Univ London, Sch Phys & Astron, Mile End Rd, London E1 4NS, England

来源：

ASTROPHYSICAL JOURNAL | 2019年 / 878卷 / 01期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

ISM: clouds; ISM: jets and outflows; ISM: molecules; stars: formation; stars: massive; submillimeter: ISM; DISTANCE-LIMITED SAMPLE; NRAO PMN SURVEYS; PROTOSTELLAR CANDIDATES; INTERSTELLAR JETS; SOURCE CATALOG; FORMING CORES; LINE EMISSION; DUST RATIO; GAS; SUBMILLIMETER;

D O I：

10.3847/1538-4357/ab1e4c

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We performed a survey in the SiO J = 5 -> 4 line toward a sample of 199 Galactic massive star-forming regions at different evolutionary stages with the Submillimeter Telescope (SMT) 10 m and Caltech Submillimeter Observatory (CSO) 10.4 m telescopes. The sample consists of 44 infrared dark clouds (IRDCs), 86 protostellar candidates, and 69 young H IT regions. We detected SiO J = 5 -> 4 line emission in 102 sources, with a detection rate of 57%, 37%, and 65% for IRDCs, protostellar candidates, and young H IT regions, respectively. We find both broad line emissions with full widths at zero power >20 km s(-1) and narrow line emissions of SiO in objects at various evolutionary stages, likely associated with high-velocity shocks and low-velocity shocks, respectively. The SiO luminosities do not show apparent differences among various evolutionary stages in our sample. We find no correlation between the SiO abundance and the luminosity-to-mass ratio, indicating that the SiO abundance does not vary significantly in regions at different evolutionary stages of star formation.

引用

页数：18

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