Liu, Tie ORCID: 0000-0002-5286-2564, Zhang, Qizhou ORCID: 0000-0003-2384-6589, Kim, Kee-Tae, Wu, Yuefang, Lee, Chang Won, Lee, Jeong-Eun ORCID: 0000-0003-3119-2087, Tatematsu, Ken'ichi, Choi, Minho, Juvela, Mika, Thompson, Mark, Goldsmith, Paul F., Liu, Sheng-yuan, Naomi, Hirano, Koch, Patrick, Henkel, Christian, Sanhueza, Patricio, He, JinHua, Rivera-Ingraham, Alana, Wang, Ke, Cunningham, Maria R., Tang, Ya-Wen, Lai, Shih-Ping, Yuan, Jinghua ORCID: 0000-0001-8060-3538, Li, Di ORCID: 0000-0003-3010-7661, Fuller, Gary ORCID: 0000-0001-8509-1818, Kang, Miju ORCID: 0000-0002-5016-050X, Luong, Quang Nguyen, Liu, Hauyu Baobab, Ristorcelli, Isabelle, Yang, Ji, Xu, Ye, Hirota, Tomoya, Mardones, Diego ORCID: 0000-0002-5065-9175, Qin, Sheng-Li, Chen, Huei-Ru, Kwon, Woojin, Meng, Fanyi, Zhang, Huawei ORCID: 0000-0002-7727-1699, Kim, Mi-Ryang and 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. Astrophys. J. Suppl. Ser., 222 (1). BRISTOL: IOP PUBLISHING LTD. ISSN 1538-4365

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Abstract

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.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Liu, TieUNSPECIFIEDorcid.org/0000-0002-5286-2564UNSPECIFIED
Zhang, QizhouUNSPECIFIEDorcid.org/0000-0003-2384-6589UNSPECIFIED
Kim, Kee-TaeUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wu, YuefangUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lee, Chang WonUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lee, Jeong-EunUNSPECIFIEDorcid.org/0000-0003-3119-2087UNSPECIFIED
Tatematsu, Ken'ichiUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Choi, MinhoUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Juvela, MikaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Thompson, MarkUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Goldsmith, Paul F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Liu, Sheng-yuanUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Naomi, HiranoUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Koch, PatrickUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Henkel, ChristianUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Sanhueza, PatricioUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
He, JinHuaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rivera-Ingraham, AlanaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wang, KeUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cunningham, Maria R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Tang, Ya-WenUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lai, Shih-PingUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Yuan, JinghuaUNSPECIFIEDorcid.org/0000-0001-8060-3538UNSPECIFIED
Li, DiUNSPECIFIEDorcid.org/0000-0003-3010-7661UNSPECIFIED
Fuller, GaryUNSPECIFIEDorcid.org/0000-0001-8509-1818UNSPECIFIED
Kang, MijuUNSPECIFIEDorcid.org/0000-0002-5016-050XUNSPECIFIED
Luong, Quang NguyenUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Liu, Hauyu BaobabUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ristorcelli, IsabelleUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Yang, JiUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Xu, YeUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hirota, TomoyaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mardones, DiegoUNSPECIFIEDorcid.org/0000-0002-5065-9175UNSPECIFIED
Qin, Sheng-LiUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Chen, Huei-RuUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kwon, WoojinUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Meng, FanyiUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Zhang, HuaweiUNSPECIFIEDorcid.org/0000-0002-7727-1699UNSPECIFIED
Kim, Mi-RyangUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Yi, Hee-WeonUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-292285
DOI: 10.3847/0067-0049/222/1/7
Journal or Publication Title: Astrophys. J. Suppl. Ser.
Volume: 222
Number: 1
Date: 2016
Publisher: IOP PUBLISHING LTD
Place of Publication: BRISTOL
ISSN: 1538-4365
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
MASSIVE-STAR-FORMATION; SPECTRAL ENERGY-DISTRIBUTIONS; RADIATION-DRIVEN IMPLOSION; IRAS POINT SOURCES; H-II REGIONS; MOLECULAR CLOUDS; STELLAR OBJECTS; EVOLUTION; CONTINUUM; COLLAPSEMultiple languages
Astronomy & AstrophysicsMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/29228

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