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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
ISSN号0067-0049
产权排序第十三完成单位
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
学科主题Astronomy & Astrophysics
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
原文出处http://iopscience.iop.org/article/10.3847/0067-0049/222/1/7/meta
语种英语
WOS记录号WOS:000368982300007
源URL[http://ir.ynao.ac.cn/handle/114a53/9323]  
专题云南天文台_大样本恒星演化研究组
云南天文台_中国科学院天体结构与演化重点实验室
作者单位1.Korea Astronomy and Space Science Institute, 776 Daedeokdae-ro, Yuseong-gu, Daejeon 34055, Korea
2.Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA
3.Department of Astronomy, Peking University, 100871, Beijing, China
4.University of Science & Technology, 217 Gajungro, Yuseong-gu, 305-333 Daejeon, Korea
5.School of Space Research, Kyung Hee University, Yongin-Si, Gyeonggi-Do 446-701, Korea
6.National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan
7.Department of Physics, University of Helsinki, FI-00014 Helsinki, Finland
8.Centre for Astrophysics Research, University of Hertfordshire, College Lane, Hatfield, AL10 9AB, UK
9.Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA
10.Academia Sinica, Institute of Astronomy and Astrophysics, P.O. Box 23-141, 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：云南天文台

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