A Search for High-mass Protostellar Objects in Cold IRAS Sources
文献类型：期刊论文
| 作者 | Ao, Y.1,2,3; Yang, J.1,2 ; Tatematsu, K.3; Henkel, C.4,5; Sunada, K.6; Nguyen-Luong, Q.3,7
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| 刊名 | ASTRONOMICAL JOURNAL
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| 出版日期 | 2018-11-01 |
| 卷号 | 156期号:5页码:14 |
| ISSN号 | 0004-6256 |
| 关键词 | ISM: clouds ISM: molecules stars: formation stars: massive stars: protostars |
| DOI | 10.3847/1538-3881/aae259 |
| 通讯作者 | Ao, Y.() |
| 英文摘要 | We present the results of CS J = 2 -> 1 mapping observations toward 39 massive star-forming regions selected from the previous CO line survey of cold IRAS sources with high-velocity CO flows along the Galactic plane. All sources are detected in CS J = 2 -> 1, showing the existence of CS clumps around the IRAS sources. However, one-third of the sources are not deeply embedded in the dense clumps by comparison of the central powering IRAS sources and the morphologies of CS clumps. Physical parameters of the dense molecular clumps are presented. We have identified 12 high-mass protostellar object (HMPO) candidates by checking the association between the dense cores and the IRAS sources, the detection of water maser, and the radio properties toward the IRAS sources. We find that the HMPO sources are characterized by low FIR luminosity to virial mass ratios since they are in very early evolutionary stages when the massive protostars have not reached their full luminosities, which are typical for zero-age main-sequence stars. Large turbulent motion in the HMPO sources may be largely due to the large kinetic energy ejected by the central protostars formed in the dense clumps. However, alternative means or undetected outflows may also be responsible for the turbulence in the clumps. |
| WOS关键词 | DENSE MOLECULAR CORES ; STAR-FORMING REGIONS ; H-II REGIONS ; DISTANCE-LIMITED SAMPLE ; SOUTHERN H2O MASERS ; RMS SURVEY ; TRIGONOMETRIC PARALLAXES ; WATER MASER ; (CO)-C-13 OBSERVATIONS ; PHYSICAL PARAMETERS |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | IOP PUBLISHING LTD |
| WOS记录号 | WOS:000460100400010 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/23803]  |
| 专题 | 中国科学院紫金山天文台 |
| 通讯作者 | Ao, Y. |
| 作者单位 | 1.Chinese Acad Sci, Purple Mt Observ, 8 Yuanhua Rd, Nanjing 210034, Jiangsu, Peoples R China 2.Chinese Acad Sci, Key Lab Radio Astron, 8 Yuanhua Rd, Nanjing 210034, Jiangsu, Peoples R China 3.Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan 4.MPIfR, Hugel 69, D-53121 Bonn, Germany 5.King Abdulaziz Univ, Astron Dept, POB 80203, Jeddah 21589, Saudi Arabia 6.NAOJ, Mizusawa VLBI Observ, Mizusawa Ku, 2-12 Hoshi Ga Oka, Oshu, Iwate 0230861, Japan 7.Korea Astron & Space Sci Inst, 776 Daedeokdae Ro, Daejeon 34055, South Korea |
| 推荐引用方式 GB/T 7714 | Ao, Y.,Yang, J.,Tatematsu, K.,et al. A Search for High-mass Protostellar Objects in Cold IRAS Sources[J]. ASTRONOMICAL JOURNAL,2018,156(5):14. |
| APA | Ao, Y.,Yang, J.,Tatematsu, K.,Henkel, C.,Sunada, K.,&Nguyen-Luong, Q..(2018).A Search for High-mass Protostellar Objects in Cold IRAS Sources.ASTRONOMICAL JOURNAL,156(5),14. |
| MLA | Ao, Y.,et al."A Search for High-mass Protostellar Objects in Cold IRAS Sources".ASTRONOMICAL JOURNAL 156.5(2018):14. |
入库方式： OAI收割
来源：紫金山天文台
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