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| Planck Galactic Cold Clumps at High Galactic Latitude-a Study with CO Lines | |
Xu, Fengwei1,2; Wu, Yuefang1,2; Liu, Tie3,4; Liu, Xunchuan1,2; Zhang, Chao1,5,6; Esimbek, Jarken7,8 ; Qin, Sheng-Li5,6; Li, Di9,10; Wang, Ke2; Yuan, Jinghua11; Meng, Fanyi1,12; Zhang, Tianwei1; Eden, David13; Tatematsu, K.14; Evans, Neal J.15,16,17; Goldsmith, Paul. F.18; Zhang, Qizhou19; Henkel, C.20,21; Yi, Hee-Weon22; Lee, Jeong-Eun22; Saajasto, Mika23; Kim, Gwanjeong14; Juvela, Mika23; Sahu, Dipen24; Hsu, Shih-Ying24,25; Liu, Sheng-Yuan24; Dutta, Somnath24; Lee, Chin-Fei; Zhang, Chuan-Peng26; Xu, Ye27,28; Ju, Binggang27,28
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| 2021-10-01 | |
| Source Publication | ASTROPHYSICAL JOURNAL
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| ISSN | 0004-637X |
| Volume | 920Issue:2Pages:103 |
| Contribution Rank | 6 |
| Abstract | Gas at high Galactic latitude is a relatively little noticed component of the interstellar medium. In an effort to address this, 41 Planck Galactic Cold Clumps at high Galactic latitude (HGal; divide b divide > 25 degrees) were observed in (CO)-C-12, (CO)-C-13, and (CO)-O-18 J = 1-0 lines, using the Purple Mountain Observatory 13.7 m telescope. (CO)-C-12 (1-0) and (CO)-C-13 (1-0) emission was detected in all clumps, while (CO)-O-18 (1-0) emission was only seen in 16 clumps. The highest and average latitudes are 71.degrees 4 and 37.degrees 8, respectively. Fifty-one velocity components were obtained, and then each was identified as a single clump. Thirty-three clumps were further mapped at 1 ' resolution, and 54 dense cores were extracted. Among dense cores, the average excitation temperature T (ex) of (CO)-C-12 is 10.3 K. The average line widths of thermal and nonthermal velocity dispersions are 0.19 and 0.46 km s(-1), respectively, suggesting that these cores are dominated by turbulence. Distances of the HGal clumps given by Gaia dust reddening are about 120-360 pc. The ratio of X (13)/X (18) is significantly higher than that in the solar neighborhood, implying that HGal gas has a different star formation history compared to the gas in the Galactic disk. HGal cores with sizes from 0.01 to 0.1 pc show no notable Larson's relation, and the turbulence remains supersonic down to a scale of slightly below 0.1 pc. None of the HGal cores that bear masses from 0.01 to 1 M (circle dot) are gravitationally bound, and all appear to be confined by outer pressure. |
| DOI | 10.3847/1538-4357/ac1686 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | MOLECULAR CLOUDS ; CARBON-MONOXIDE ; STAR-FORMATION ; H-I ; INFRARED CIRRUS ; DARK CLOUDS ; DENSE CORES ; GAS ; TRANSLUCENT ; TURBULENCE |
| Funding Project | NSFC[11433008] ; NSFC[12033005] ; NSFC[11988101] ; NSFC[11373009] ; NSFC[11503035] ; NSFC[11573036] ; China Ministry of Science and Technology[2012CB821800] ; National Key R&D Program of China[2017YFA0402600] ; National Aeronautics and Space Administration[80NM0018D0004] ; National Science Foundation[ACI-1440620] ; [CONICYT/PCI/REDI170243] |
| WOS Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:000709102800001 |
| Publisher | IOP Publishing Ltd |
| Funding Organization | NSFC ; China Ministry of Science and Technology ; National Key R&D Program of China ; National Aeronautics and Space Administration ; National Science Foundation |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/4308 |
| Collection | 射电天文研究室_恒星形成与演化研究团组 |
| Corresponding Author | Xu, Fengwei |
| Affiliation | 1.Peking Univ, Sch Phys, Dept Astron, Beijing 100871, Peoples R China 2.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China 3.Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China 4.Korea Astron & Space Sci Inst, 776 Daedeokdaero, Daejeon 34055, South Korea 5.Yunnan Univ, Dept Astron, Kunming 650091, Yunnan, Peoples R China 6.Key Lab Astroparticle Phys Yunnan Prov, Kunming 650091, Yunnan, Peoples R China 7.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China 8.Chinese Acad Sci, Key Lab Radio Astron, Urumqi 830011, Peoples R China 9.Chinese Acad Sci, Natl Astron Observ, CAS Key Lab FAST, Beijing 100012, Peoples R China 10.Univ KwaZulu Natal, NAOC UKZN Computat Astrophys Ctr NUCAC, ZA-4000 Durban, South Africa 11.Chinese Acad Sci, Natl Astron Observ, 20A Datun Rd, Beijing 100012, Peoples R China 12.Univ Cologne, Phys Inst 1, Zulpicher Str 77, D-50937 Cologne, Germany 13.Liverpool John Moores Univ, IC2, Astrophys Res Inst, Liverpool Sci Pk,146 Brownlow Hill, Liverpool L3 5RF, Merseyside, England 14.Natl Astron Observ Japan, Natl Inst Nat Sci, Nobeyama Radio Observ, Minamisa Ku, 462-2 Nobeyama, Nagano 3841305, Japan 15.Univ Texas Austin, Dept Astron, 2515 Speedway,Stop C1400, Austin, TX 78712 USA 16.Korea Astron & Space Sci Inst, 776 Daedeokdae Ro, Daejeon 34055, South Korea 17.Kyung Hee Univ, Humanitas Coll, Global Campus, Yongin 17104, South Korea 18.CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA 19.Ctr Astrophys Harvard & Smithsonian, 60 Garden St, Cambridge, MA 02138 USA 20.Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany 21.King Abdulaziz Univ, Fac Sci, Astron Dept, POB 80203, Jeddah 21589, Saudi Arabia 22.Kyung Hee Univ, Sch Space Res, 1732 Deogyeong Daero, Yongin 17104, Gyeonggi Do, South Korea 23.Univ Helsinki, Dept Phys, POB 64, FI-00014 Helsinki, Finland 24.Acad Sinica, Inst Astron & Astrophys, 11F AS NTU Astron Math Bldg,1,Sect 4,Roosevelt Rd, Taipei 10617, Taiwan 25.Natl Taiwan Univ NTU, Taipei, Taiwan 26.Chinese Acad Sci, Natl Astron Observ, Beijing 100101, Peoples R China 27.Chinese Acad Sci, Purple Mt Observ, 8 Yuanhua Rd, Nanjing 210034, Peoples R China 28.Chinese Acad Sci, Key Lab Radio Astron, 8 Yuanhua Rd, Nanjing 210034, Peoples R China |
| Recommended Citation GB/T 7714 | Xu, Fengwei,Wu, Yuefang,Liu, Tie,et al. Planck Galactic Cold Clumps at High Galactic Latitude-a Study with CO Lines[J]. ASTROPHYSICAL JOURNAL,2021,920(2):103. |
| APA | Xu, Fengwei.,Wu, Yuefang.,Liu, Tie.,Liu, Xunchuan.,Zhang, Chao.,...&Ju, Binggang.(2021).Planck Galactic Cold Clumps at High Galactic Latitude-a Study with CO Lines.ASTROPHYSICAL JOURNAL,920(2),103. |
| MLA | Xu, Fengwei,et al."Planck Galactic Cold Clumps at High Galactic Latitude-a Study with CO Lines".ASTROPHYSICAL JOURNAL 920.2(2021):103. |
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| Xu-2021-Planck Galac（3280KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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