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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; Evans II, Neal J.3; Hirano, Naomi1; Tatematsu, Ken'ichi4,30; 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, Jinhua8,12,13; 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, Shanghuo5,6; Luo, Qiu-Yi2; Montillaud, Julien24; Moraghan, Anthony1; Pelkonen, Veli-Matti25; Qin, Sheng-Li26,27; Ristorcelli, Isabelle28; Sanhueza, Patricio29,30; Shang, Hsien1; Shen, Zhi-Qiang2; Soam, Archana31; Wu, Yuefang32; Zhang, Qizhou33; Zhou, Jianjun34
2021
Source PublicationASTROPHYSICAL JOURNAL LETTERS
ISSN2041-8205
Volume907Issue:1Pages:L15
Contribution Rank33
AbstractPrestellar 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.
KeywordMolecular clouds Collapsing clouds Star-forming regions Star formation Protostars
DOI10.3847/2041-8213/abd3aa
URL查看原文
Indexed BySCI
Language英语
WOS KeywordSTAR-FORMATION ; FRAGMENTATION ; MASS ; CLOUDS ; SYSTEM
Funding ProjectMinistry of Science and Technology (MoST)[108-2112-M-001-048-] ; Ministry of Science and Technology (MoST)[108-2112-M-001-052-] ; international partnership program of the Chinese Academy of Sciences[114231KYSB20200009] ; National Natural Science Foundation of China (NSFC)[12073061] ; Shanghai Pujiang Program[20PJ1415500] ; ANID[AFB 170002] ; ANID[AFB-170002] ; National Natural Science Foundation of China[U1631237] ; NRC Canada ; NSERC Discovery Grant ; 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] ; NSF[AST-1715876] ; NSFC[11911530226] ; NSFC[11725313] ; NSFC[11873086] ; JSPS KAKENHI[20H05645] ; Yunnan Province of China[2017HC018] ; Chinese Academy of Sciences (CAS) ; [MoST 108-2112-M-001-017] ; [MoST 109-2112-M-001-023]
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000608871700001
PublisherIOP PUBLISHING LTD
Funding OrganizationMinistry of Science and Technology (MoST) ; international partnership program of the Chinese Academy of Sciences ; National Natural Science Foundation of China (NSFC) ; Shanghai Pujiang Program ; ANID ; National Natural Science Foundation of China ; NRC Canada ; NSERC Discovery Grant ; Spanish MINECO ; State Agency for Research of the Spanish Ministry of Science and Innovation through the Unit of Excellence Maria de Maeztu 2020-2023 award ; Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education, Science and Technology ; NSF ; NSFC ; JSPS KAKENHI ; Yunnan Province of China ; Chinese Academy of Sciences (CAS)
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.xao.ac.cn/handle/45760611-7/3821
Collection射电天文研究室_恒星形成与演化研究团组
Corresponding AuthorSahu, Dipen; Liu, Sheng-Yuan; Liu, Tie
Affiliation1.Acad Sinica, Inst Astron & Astrophys, 11F AS NTU Astron Math Bldg,1,Sec 4,Roosevelt Rd, Taipei 10617, Taiwan
2.Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China
3.Univ Texas Austin, Dept Astron, 2515 Speedway,Stop C1400, Austin, TX 78712 USA
4.Natl Inst Nat Sci, Natl Astron Observ Japan, Nobeyama Radio Observ, Minamisa Ku, 462-2 Nobeyama, Minamimaki, Nagano 3841305, Japan
5.Korea Astron & Space Sci Inst, 776 Daedeokdae Ro, Daejeon 34055, South Korea
6.Univ Sci & Technol, Korea UST, 217 Gajeong Ro, Daejeon 34113, South Korea
7.Nazarbayev Univ, Sch Sci & Humanities, Dept Phys, Nur Sultan 010000, Kazakhstan
8.Univ Chile, Dept Astron, Camino El Observ 1515, Santiago, Chile
9.Univ New South Wales UNSW, Sch Phys, Sydney, NSW 2052, Australia
10.Liverpool John Moores Univ, Astrophys Res Inst, iC2, Liverpool Sci Pk,146 Brownlow Hill, Liverpool L3 5RF, Merseyside, England
11.CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA
12.Chinese Acad Sci, Yunnan Observ, 396 Yangfangwang, Kunming 650216, Yunnan, Peoples R China
13.Chinese Acad Sci, Natl Astron Observ, CAS, Amer Ctr Astron, Beijing 100101, Peoples R China
14.Natl Taiwan Univ NTU, Taipei, Taiwan
15.NRC Herzberg Astron & Astrophys, 5071 West Saanich Rd, Victoria, BC V9E 2E7, Canada
16.Univ Victoria, Dept Phys & Astron, Victoria, BC V8P 5C2, Canada
17.Univ Helsinki, Dept Phys, POB 64, FI-00014 Helsinki, Finland
18.Natl Taiwan Normal Univ, Dept Earth Sci, Taipei, Taiwan
19.Seoul Natl Univ, Dept Earth Sci Educ, 1 Gwanak Ro, Seoul 08826, South Korea
20.Kyung Hee Univ, Sch Space Res, 1732 Deogyeong Daero, Yongin 17104, Gyunggi Do, South Korea
21.Chinese Acad Sci, Natl Astron Observ, Beijing 100101, Peoples R China
22.Univ KwaZulu Natal, NAOC UKZN Computat Astrophys Ctr, ZA-4000 Durban, South Africa
23.Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA
24.Univ Bourgogne Franche Comte, Inst UTINAM, OSU THETA, CNRS,UMR 6213, 41Bis Ave Observ, F-25000 Besancon, France
25.Univ Barcelona, Inst Ciencies Cosmos, IEEC UB, Marti & Franques 1, E-08028 Barcelona, Spain
26.Yunnan Univ, Dept Astron, Kunming 650091, Yunnan, Peoples R China
27.Key Lab Particle Astrophys Yunnan Prov, Kunming 650091, Yunnan, Peoples R China
28.Univ Toulouse, UPS OMP, IRAP, F-31028 Toulouse 4, France
29.Natl Inst Nat Sci, Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan
30.Grad Univ Adv Studies, Dept Astron Sci, SOKENDAI, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan
31.NASA, Ames Res Ctr, Univ Space Res Assoc, SOFIA Sci Ctr, Moffett Field, CA 94035 USA
32.Peking Univ, Dept Astron, Beijing 100871, Peoples R China
33.Ctr Astrophys Harvard & Smithsonian, 60 Garden St, Cambridge, MA 02138 USA
34.CAS Urumqi, Xinjiang Astron Observ, Xinjiang, CN, Peoples R 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):L15.
APA Sahu, Dipen.,Liu, Sheng-Yuan.,Liu, Tie.,Evans II, Neal J..,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),L15.
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):L15.
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