ALMA Survey of Orion Planck Galactic Cold Clumps (ALMASOP): Detection of Extremely High-density Compact Structure of Prestellar Cores and Multiple Substructures Within
文献类型：期刊论文
| 作者 | 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 |
| 刊名 | ASTROPHYSICAL JOURNAL LETTERS
 |
| 出版日期 | 2021 |
| 卷号 | 907期号:1页码:L15 |
| ISSN号 | 2041-8205 |
| 关键词 | Molecular clouds Collapsing clouds Star-forming regions Star formation Protostars |
| DOI | 10.3847/2041-8213/abd3aa |
| 产权排序 | 33 |
| 英文摘要 | 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. |
| URL标识 | 查看原文 |
| WOS关键词 | STAR-FORMATION ; FRAGMENTATION ; MASS ; CLOUDS ; SYSTEM |
| 资助项目 | Ministry 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研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | IOP PUBLISHING LTD |
| WOS记录号 | WOS:000608871700001 |
| 资助机构 | Ministry 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) |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/3820]  |
| 专题 | 恒星形成与演化研究团组 |
| 通讯作者 | Sahu, Dipen; Liu, Sheng-Yuan; Liu, Tie |
| 作者单位 | 1.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 |
| 推荐引用方式 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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