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ALMA Survey of Orion Planck Galactic Cold Clumps (ALMASOP): Detection of Extremely High-density Compact Structure of Prestellar Cores and Multiple Substructures Within
Sahu, Dipen1; Liu, Sheng-Yuan1; Liu, Tie2; II, Neal J. Evans3; Hirano, Naomi1; Tatematsu, Ken'ichi4,29; Lee, Chin-Fei1; Kim, Kee-Tae5,6; Dutta, Somnath1; Alina, Dana7; Bronfman, Leonardo8; Cunningham, Maria9; Eden, David J.10; Garay, Guido8; Goldsmith, Paul F.11; He JH(何金华)8,12,13; Hsu, Shih-Ying1,14; Jhan, Kai-Syun1,14; Johnstone, Doug15,16; Juvela, Mika17; Kim, Gwanjeong4; Kuan, Yi-Jehng1,18; Kwon, Woojin19; Lee, Chang Won5,6; Lee, Jeong-Eun20; Li, Di21,22; Li, Pak Shing23; Li, Shanghuo5; Luo, Qiu-Yi2; Montillaud, Julien24; Moraghan, Anthony1; Pelkonen, Veli-Matti25; Qin, Sheng-Li26; Ristorcelli, Isabelle27; Sanhueza, Patricio28,29; Shang, Hsien1; Shen, Zhi-Qiang2; Soam, Archana30; Wu, Yuefang31; Zhang, Qizhou32; Zhou, Jianjun33
Source PublicationASTROPHYSICAL JOURNAL LETTERS
2021-01
Volume907Issue:1
DOI10.3847/2041-8213/abd3aa
Contribution Rank第12完成单位
Indexed BySCI
KeywordMolecular clouds Collapsing clouds Star-forming regions Star formation Protostars
Abstract

Prestellar cores are self-gravitating dense and cold structures within molecular clouds where future stars are born. They are expected, at the stage of transitioning to the protostellar phase, to harbor centrally concentrated dense (sub)structures that will seed the formation of a new star or the binary/multiple stellar systems. Characterizing this critical stage of evolution is key to our understanding of star formation. In this work, we report the detection of high-density (sub)structures on the thousand-astronomical-unit (au) scale in a sample of dense prestellar cores. Through our recent ALMA observations toward the Orion Planck Galactic Cold Clumps, we have found five extremely dense prestellar cores, which have centrally concentrated regions of similar to 2000 au in size, and several 10(7) cm(-3) in average density. Masses of these centrally dense regions are in the range of 0.30 to 6.89 M. For the first time, our higher resolution observations (0.8 '' similar to 320 au) further reveal that one of the cores shows clear signatures of fragmentation; such individual substructures/fragments have sizes of 800-1700 au, masses of 0.08 to 0.84 M, densities of 2 - 8 x 10(7) cm(-3), and separations of similar to 1200 au. The substructures are massive enough (greater than or similar to 0.1 M) to form young stellar objects and are likely examples of the earliest stage of stellar embryos that can lead to widely (similar to 1200 au) separated multiple systems.

Funding ProjectMinistry of Science and Technology (MoST)Ministry of Science and Technology, China[108-2112-M-001-048-] ; Ministry of Science and Technology (MoST)Ministry of Science and Technology, China[108-2112-M-001-052-] ; international partnership program of the Chinese Academy of Sciences[114231KYSB20200009] ; National Natural Science Foundation of China (NSFC)National Natural Science Foundation of China (NSFC)[12073061] ; Shanghai Pujiang ProgramShanghai Pujiang Program[20PJ1415500] ; ANID[AFB 170002] ; ANID[AFB-170002] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[U1631237] ; NRC Canada ; NSERC Discovery GrantNatural Sciences and Engineering Research Council of Canada (NSERC) ; Spanish MINECO[AYA2017-88754-P] ; State Agency for Research of the Spanish Ministry of Science and Innovation through the Unit of Excellence Maria de Maeztu 2020-2023 award[CEX2019-000918-M] ; Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education, Science and Technology[NRF-2019R1A2C1010851] ; NSFNational Science Foundation (NSF)[AST-1715876] ; NSFCNational Natural Science Foundation of China (NSFC)[11911530226] ; NSFCNational Natural Science Foundation of China (NSFC)[11725313] ; NSFCNational Natural Science Foundation of China (NSFC)[11873086] ; JSPS KAKENHIMinistry of Education, Culture, Sports, Science and Technology, Japan (MEXT)Japan Society for the Promotion of ScienceGrants-in-Aid for Scientific Research (KAKENHI)[20H05645] ; Yunnan Province of China[2017HC018] ; Chinese Academy of Sciences (CAS)Chinese Academy of Sciences ; [MoST 108-2112-M-001-017] ; [MoST 109-2112-M-001-023]
Funding OrganizationMinistry of Science and Technology (MoST)Ministry of Science and Technology, China[108-2112-M-001-048-, 108-2112-M-001-052-] ; international partnership program of the Chinese Academy of Sciences[114231KYSB20200009] ; National Natural Science Foundation of China (NSFC)National Natural Science Foundation of China (NSFC)[12073061] ; Shanghai Pujiang ProgramShanghai Pujiang Program[20PJ1415500] ; ANID[AFB 170002, AFB-170002] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[U1631237] ; NRC Canada ; NSERC Discovery GrantNatural Sciences and Engineering Research Council of Canada (NSERC) ; Spanish MINECO[AYA2017-88754-P] ; State Agency for Research of the Spanish Ministry of Science and Innovation through the Unit of Excellence Maria de Maeztu 2020-2023 award[CEX2019-000918-M] ; Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education, Science and Technology[NRF-2019R1A2C1010851] ; NSFNational Science Foundation (NSF)[AST-1715876] ; NSFCNational Natural Science Foundation of China (NSFC)[11911530226, 11725313, 11873086] ; JSPS KAKENHIMinistry of Education, Culture, Sports, Science and Technology, Japan (MEXT)Japan Society for the Promotion of ScienceGrants-in-Aid for Scientific Research (KAKENHI)[20H05645] ; Yunnan Province of China[2017HC018] ; Chinese Academy of Sciences (CAS)Chinese Academy of Sciences ; [MoST 108-2112-M-001-017] ; [MoST 109-2112-M-001-023]
Language英语
Subject Area天文学 ; 恒星与银河系 ; 恒星形成与演化
MOST Discipline Catalogue理学::天文学
SubtypeArticle
PublisherIOP PUBLISHING LTD
Publication PlaceTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN2041-8205
URL查看原文
WOS IDWOS:000608871700001
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordSTAR-FORMATION ; FRAGMENTATION ; MASS ; CLOUDS ; SYSTEM
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/24038
Collection大样本恒星演化研究组
Corresponding AuthorSahu, Dipen
Affiliation1.Academia Sinica Institute of Astronomy and Astrophysics, 11F of AS/NTU Astronomy-Mathematics Building, No.1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan R.O.C.; dsahu@asiaa.sinica.edu.tw, syliu@asiaa.sinica.edu.tw;
2.Shanghai Astronomical Observatory, Chinese Academy of Sciences, 80 Nandan Road, Shanghai 200030, People's Republic of China; liutie@shao.ac.cn;
3.Department of Astronomy The University of Texas at Austin 2515 Speedway, Stop C1400 Austin, TX 78712-1205, USA;
4.Nobeyama Radio Observatory, National Astronomical Observatory of Japan, National Institutes of Natural Sciences, 462-2 Nobeyama, Minamimaki, Minamisaku, Nagano 384-1305, Japan;
5.Korea Astronomy and Space Science Institute, 776 Daedeokdae-ro, Yuseong-gu, Daejeon 34055, Republic of Korea;
6.University of Science and Technology, Korea (UST), 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of Korea;
7.Department of Physics, School of Sciences and Humanities, Nazarbayev University, Nur-Sultan 010000, Kazakhstan;
8.Departamento de Astronomía, Universidad de Chile, Camino el Observatorio 1515, Las Condes, Santiago, Chile;
9.School of Physics, University of New South Wales(UNSW), Sydney, NSW 2052, Australia;
10.Astrophysics Research Institute, Liverpool John Moores University, iC2, Liverpool Science Park, 146 Brownlow Hill, Liverpool, L3 5RF, UK;
11.Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA;
12.Yunnan Observatories, Chinese Academy of Sciences, 396 Yangfangwang, Guandu District, Kunming, 650216, People's Republic of China;
13.Chinese Academy of Sciences South America Center for Astronomy, National Astronomical Observatories, CAS, Beijing 100101, People's Republic of China;
14.National Taiwan University (NTU), Taiwan R.O.C.;
15.NRC Herzberg Astronomy and Astrophysics, 5071 West Saanich Road, Victoria, BC, V9E 2E7, Canada;
16.Department of Physics and Astronomy, University of Victoria, Victoria, BC, V8P 5C2, Canada;
17.Department of Physics, P.O. Box 64, FI-00014, University of Helsinki, Finland;
18.Department of Earth Sciences, National Taiwan Normal University, Taipei, Taiwan R.O.C.;
19.Department of Earth Science Education, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea;
20.School of Space Research, Kyung Hee University, 1732, Deogyeong-Daero, Giheung-gu Yongin-shi, Gyunggi-do 17104, Republic of Korea;
21.National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People's Republic of China;
22.NAOC-UKZN Computational Astrophysics Centre, University of KwaZulu-Natal, Durban 4000, South Africa;
23.Department of Astronomy, University of California, Berkeley, CA 94720, USA;
24.Institut UTINAM—UMR 6213—CNRS–Univ. Bourgogne Franche Comté, OSU THETA, 41bis avenue de l'Observatoire, F-25000 Besançon, France;
25.Institut de Ciències del Cosmos, Universitat de Barcelona, IEEC-UB, Martí i Franqués 1, E-08028 Barcelona, Spain;
26.Department of Astronomy, Yunnan University, and Key Laboratory of Particle Astrophysics of Yunnan Province, Kunming, 650091, People's Republic of China;
27.Université de Toulouse, UPS-OMP, IRAP, F-31028 Toulouse cedex 4, France;
28.National Astronomical Observatory of Japan, National Institutes of Natural Sciences, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan;
29.Department of Astronomical Science, SOKENDAI (The Graduate University for Advanced Studies), 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan;
30.SOFIA Science Center, Universities Space Research Association, NASA Ames Research Center, Moffett Field, California 94035, USA;
31.Department of Astronomy, Peking University, 100871 Beijing, People's Republic of China;
32.Center for Astrophysics ∣ Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USA;
33.Xinjiang Astronomical Observatory, CAS: Urumqi, Xinjiang, CN, People's Republic of China
Recommended Citation
GB/T 7714
Sahu, Dipen,Liu, Sheng-Yuan,Liu, Tie,et al. ALMA Survey of Orion Planck Galactic Cold Clumps (ALMASOP): Detection of Extremely High-density Compact Structure of Prestellar Cores and Multiple Substructures Within[J]. ASTROPHYSICAL JOURNAL LETTERS,2021,907(1).
APA Sahu, Dipen.,Liu, Sheng-Yuan.,Liu, Tie.,II, Neal J. Evans.,Hirano, Naomi.,...&Zhou, Jianjun.(2021).ALMA Survey of Orion Planck Galactic Cold Clumps (ALMASOP): Detection of Extremely High-density Compact Structure of Prestellar Cores and Multiple Substructures Within.ASTROPHYSICAL JOURNAL LETTERS,907(1).
MLA Sahu, Dipen,et al."ALMA Survey of Orion Planck Galactic Cold Clumps (ALMASOP): Detection of Extremely High-density Compact Structure of Prestellar Cores and Multiple Substructures Within".ASTROPHYSICAL JOURNAL LETTERS 907.1(2021).
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