PLANCK COLD CLUMPS IN THE lambda ORIONIS COMPLEX. I. DISCOVERY OF AN EXTREMELY YOUNG CLASS 0 PROTOSTELLAR OBJECT AND A PROTO-BROWN DWARF CANDIDATE IN THE BRIGHT-RIMMED CLUMP PGCC G192.32-11.88
文献类型：期刊论文
| 作者 | Liu, Tie1; Zhang, Qizhou2; Kim, Kee-Tae1; Wu, Yuefang3; Lee, Chang Won1,4; Lee, Jeong-Eun5; Tatematsu, Ken'ichi6; Choi, Minho1; Juvela, Mika7; Thompson, Mark8 |
| 刊名 | ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
 |
| 出版日期 | 2016 |
| 卷号 | 222期号:1 |
| 关键词 | ISM: jets and outflows ISM: kinematics and dynamics stars: formation |
| 英文摘要 | We are performing a series of observations with ground-based telescopes toward Planck Galactic cold clumps (PGCCs) in the lambda Orionis complex in order to systematically investigate the effects of stellar feedback. In the particular case of PGCC G192.32-11.88, we discovered an extremely young Class 0 protostellar object (G192N) and a proto-brown dwarf candidate (G192S). G192N and G192S are located in a gravitationally bound brightrimmed clump. The velocity and temperature gradients seen in line emission of CO isotopologues indicate that PGCC G192.32-11.88 is externally heated and compressed. G192N probably has the lowest bolometric luminosity (similar to 0.8 L-circle dot) and accretion rate (6.3 x 10(-7) M-circle dot yr(-1)) when compared with other young Class 0 sources (e.g., PACS Bright Red Sources) in the Orion complex. It has slightly larger internal luminosity (0.21 +/- 0.01 L-circle dot) and outflow velocity (similar to 14 km s(-1)) than the predictions of first hydrostatic cores (FHSCs). G192N might be among the youngest Class 0 sources, which are slightly more evolved than an FHSC. Considering its low internal luminosity (0.08 +/- 0.01 L-circle dot) and accretion rate (2.8 x 10(-8) M-circle dot yr(-1)), G192S is an ideal proto-brown dwarf candidate. The star formation efficiency (similar to 0.3%-0.4%) and core formation efficiency (similar to 1%) in PGCC G192.32-11.88 are significantly smaller than in other giant molecular clouds or filaments, indicating that the star formation therein is greatly suppressed owing to stellar feedback. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | MASSIVE-STAR-FORMATION ; SPECTRAL ENERGY-DISTRIBUTIONS ; RADIATION-DRIVEN IMPLOSION ; IRAS POINT SOURCES ; H-II REGIONS ; STELLAR OBJECTS ; MOLECULAR CLOUDS ; SUBMILLIMETER ARRAY ; FORMING REGION ; CORES |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000368982300007 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/16118]  |
| 专题 | 紫金山天文台_紫金山天文台青海观测站 |
| 作者单位 | 1.Korea Astron & Space Sci Inst, Daejeon 34055, South Korea 2.Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA 3.Peking Univ, Dept Astron, Beijing 100871, Peoples R China 4.Univ Sci & Technol, Daejeon 305333, South Korea 5.Kyung Hee Univ, Sch Space Res, Yongin 446701, Gyeonggi Do, South Korea 6.Natl Astron Observ Japan, Mitaka, Tokyo 1818588, Japan 7.Univ Helsinki, Dept Phys, FI-00014 Helsinki, Finland 8.Univ Hertfordshire, Ctr Astrophys Res, Hatfield AL10 9AB, Herts, England 9.CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA 10.Acad Sinica, Inst Astron & Astrophys, Taipei 106, Taiwan |
| 推荐引用方式 GB/T 7714 | Liu, Tie,Zhang, Qizhou,Kim, Kee-Tae,et al. PLANCK COLD CLUMPS IN THE lambda ORIONIS COMPLEX. I. DISCOVERY OF AN EXTREMELY YOUNG CLASS 0 PROTOSTELLAR OBJECT AND A PROTO-BROWN DWARF CANDIDATE IN THE BRIGHT-RIMMED CLUMP PGCC G192.32-11.88[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2016,222(1). |
| APA | Liu, Tie.,Zhang, Qizhou.,Kim, Kee-Tae.,Wu, Yuefang.,Lee, Chang Won.,...&Yi, Hee-Weon.(2016).PLANCK COLD CLUMPS IN THE lambda ORIONIS COMPLEX. I. DISCOVERY OF AN EXTREMELY YOUNG CLASS 0 PROTOSTELLAR OBJECT AND A PROTO-BROWN DWARF CANDIDATE IN THE BRIGHT-RIMMED CLUMP PGCC G192.32-11.88.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,222(1). |
| MLA | Liu, Tie,et al."PLANCK COLD CLUMPS IN THE lambda ORIONIS COMPLEX. I. DISCOVERY OF AN EXTREMELY YOUNG CLASS 0 PROTOSTELLAR OBJECT AND A PROTO-BROWN DWARF CANDIDATE IN THE BRIGHT-RIMMED CLUMP PGCC G192.32-11.88".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 222.1(2016). |
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来源：紫金山天文台
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