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ALMA observations of massive clouds in the central molecular zone: slim filaments tracing parsec-scale shocks

文献类型：期刊论文

作者Yang, Kai16,17,18; Lu, Xing19; Zhang, Yichen16; Liu, Xunchuan19; Ginsburg, Adam20; Liu, Hauyu Baobab21,22; Cheng, Yu23; Feng, Siyi24; Liu, Tie19; Zhang, Qizhou11
刊名ASTRONOMY & ASTROPHYSICS
出版日期2025-02-04
卷号694页码:A86
关键词stars: formation ISM: clouds ISM: kinematics and dynamics ISM: molecules Galaxy: center
ISSN号0004-6361
DOI10.1051/0004-6361/202453191
产权排序17
英文摘要The central molecular zone (CMZ) of our Galaxy exhibits widespread emission from SiO and various complex organic molecules (COMs), yet the exact origin of such emission is uncertain. Here we report the discovery of a unique class of long (>0.5 pc) and narrow (<0.03 pc) filaments in the emission of SiO 5-4 and eight additional molecular lines, including several COMs, in our ALMA 1.3 mm spectral line observations toward two massive molecular clouds in the CMZ, which we name as slim filaments. However, these filaments are not detected in the 1.3 mm continuum at the 5 sigma level. Their line-of-sight velocities are coherent and inconsistent with being outflows. The column densities and relative abundances of the detected molecules are statistically similar to those in protostellar outflows but different from those in dense cores within the same clouds. Turbulent pressure in these filaments dominates over self gravity and leads to hydrostatic inequilibrium, indicating that they are a different class of objects than the dense gas filaments in dynamical equilibrium ubiquitously found in nearby molecular clouds. We argue that these newly detected slim filaments are associated with parsec-scale shocks, likely arising from dynamic interactions between shock waves and molecular clouds. The dissipation of the slim filaments may replenish SiO and COMs in the interstellar medium and lead to their widespread emission in the CMZ.
WOS关键词STAR-FORMATION RATES ; GALACTIC-CENTER ; SIO EMISSION ; ORGANIC-MOLECULES ; VELOCITY SHOCKS ; OUTFLOW ; FRAGMENTATION ; METHANOL ; GAS ; PC
资助项目National Key Research and Development Program of Chinahttp://dx.doi.org/10.13039/501100012166[2022YFA1603100] ; National Key R&D Program of China[XDB0800300] ; Strategic Priority Research Program of the Chinese Academy of Sciences (CAS)[2024379] ; Shanghai Post-doctoral Excellence Program[12273090] ; Shanghai Post-doctoral Excellence Program[12322305] ; National Natural Science Foundation of China (NSFC)[23ZR1482100] ; Natural Science Foundation of Shanghai[xbzg-zdsys-202212] ; CAS Light of West China Program ; Yangyang Development Fund[111-2112-M- 110-022-MY3] ; Yangyang Development Fund[113-2112-M-110-022-MY3] ; National Science and Technology Council (NSTC) of Taiwan[1813765] ; National Science and Technology Council (NSTC) of Taiwan[2115428] ; National Science and Technology Council (NSTC) of Taiwan[2206509] ; National Science and Technology Council (NSTC) of Taiwan[CAREER 2339670] ; National Science Foundation[714907] ; European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme via the ERC Starting Grant MUSTANG ; Decentralized Autonomous Organization[12373023] ; Decentralized Autonomous Organization[12133008] ; National Science Foundation of China[AAG 2008101] ; National Science Foundation of China[2206511] ; National Science Foundation of China[CAREER 2142300] ; NSF ; Youth Innovation Promotion Association CAS[11903038] ; NSFC[XDB1070301] ; NSFC[XDB1070302] ; Strategic Priority Research Program of the Chinese Academy of Sciences[2016.1.00875] ; ALMA ; Astropy (Astropy Collaboration)
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001414753300025
出版者EDP SCIENCES S A
资助机构National Key Research and Development Program of Chinahttp://dx.doi.org/10.13039/501100012166 ; National Key R&D Program of China ; Strategic Priority Research Program of the Chinese Academy of Sciences (CAS) ; Shanghai Post-doctoral Excellence Program ; National Natural Science Foundation of China (NSFC) ; Natural Science Foundation of Shanghai ; CAS Light of West China Program ; Yangyang Development Fund ; National Science and Technology Council (NSTC) of Taiwan ; National Science Foundation ; European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme via the ERC Starting Grant MUSTANG ; Decentralized Autonomous Organization ; National Science Foundation of China ; NSF ; Youth Innovation Promotion Association CAS ; NSFC ; Strategic Priority Research Program of the Chinese Academy of Sciences ; ALMA ; Astropy (Astropy Collaboration)
源URL[http://ir.xao.ac.cn/handle/45760611-7/7439]  
专题恒星形成与演化研究团组
通讯作者Yang, Kai; Lu, Xing; Zhang, Yichen
作者单位1.MIT, Haystack Observ, 99 Millstone Rd, Westford, MA 01886 USA
2.Univ Kansas, Dept Phys & Astron, 1251 Wescoe Hall Dr, Lawrence, KS 66045 USA
3.Univ Manchester, UK ALMA Reg Ctr Node, Jodrell Bank Ctr Astrophys, Manchester M13 9PL, England
4.Nagoya Univ, Grad Sch Sci, Dept Phys, Furo Cho,Chikusa Ku, Nagoya 4648602, Japan
5.Liverpool John Moores Univ, Astrophys Res Inst, IC2,Liverpool Sci Pk,146 Brownlow Hill, Liverpool L3 5RF, England
6.Cosm Origins Life COOL Res DAO, Munich, Germany
7.Xinjiang Astron Observ, 150 Sci 1-St, Urumqi 830011, Xinjiang, Peoples R China
8.Univ Chinese Acad Sci, Beijing 100080, Peoples R China
9.Chinese Acad Sci, Key Lab Radio Astron, Urumqi 830011, Peoples R China
10.Xinjiang Key Lab Radio Astrophys, Urumqi 830011, Peoples R China
推荐引用方式
GB/T 7714		 Yang, Kai,Lu, Xing,Zhang, Yichen,et al. ALMA observations of massive clouds in the central molecular zone: slim filaments tracing parsec-scale shocks[J]. ASTRONOMY & ASTROPHYSICS,2025,694:A86.
APA Yang, Kai.,Lu, Xing.,Zhang, Yichen.,Liu, Xunchuan.,Ginsburg, Adam.,...&Shen, Zhiqiang.(2025).ALMA observations of massive clouds in the central molecular zone: slim filaments tracing parsec-scale shocks.ASTRONOMY & ASTROPHYSICS,694,A86.
MLA Yang, Kai,et al."ALMA observations of massive clouds in the central molecular zone: slim filaments tracing parsec-scale shocks".ASTRONOMY & ASTROPHYSICS 694(2025):A86.

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来源：新疆天文台

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