典型文献
Molecular Clouds Associated with H Ⅱ Regions and Candidates within l=106°.65 to 109°.50 and b=?1°.85 to 0°.95
文献摘要：
We present a large-scale simultaneous survey of the CO isotopologues (12CO, 13CO, and C18O) J=1–0 line emission toward the Galactic plane region of l=106°. 65 to 109°. 50 and b=?1°. 85 to 0°. 95 using the Purple Mountain Observatory 13.7 m millimeter-wavelength telescope. Except for the molecular gas in the solar neighborhood, the emission from the molecular gas in this region is concentrated in the velocity range of [?60,?35] km s?1. The gas in the region can be divided into four clouds, with mass in the range of～103–104 M☉. We have identified 25 filaments based on the 13CO data. The median excitation temperature, length, line mass, line width, and virial parameter of the filaments are 10.89 K, 8.49 pc, 146.11 M☉pc?1, 1.01 km s?1, and 3.14, respectively. Among these filaments, eight have virial parameters of less than 2, suggesting that they are gravitationally bound and can lead to star formation. Nineteen H Ⅱ regions or candidates have previously been found in the region and we investigate the relationships between these H Ⅱ regions/candidates and surrounding molecular clouds in detail. Using morphology similarity and radial velocity consistency between H Ⅱ regions/candidates and molecular clouds as evidence for association, and raised temperature and velocity broadening as signatures of interaction, we propose that 12 H Ⅱ regions/candidates are associated with their surrounding molecular clouds. In the case of the H Ⅱ region of S142, the energy of the H Ⅱ region is sufficient to maintain the turbulence in the surrounding molecular gas.
文献关键词：
中图分类号：
作者姓名：
Chun-Xue Li;Hong-Chi Wang;Yue-Hui Ma;Miao-Miao Zhang;Chong Li;Yu-Qing Zheng
作者机构：
Purple Mountain Observatory and Key Laboratory of Radio Astronomy,Chinese Academy of Sciences,Nanjing 210033,China;School of Astronomy and Space Science,University of Science and Technology of China,Hefei 230026,China;School of Astronomy and Space Science,Nanjing University,Nanjing 210023,China;Key Laboratory of Modern Astronomy and Astrophysics(Nanjing University),Ministry of Education,Nanjing 210023,China
文献出处：
引用格式：
[1]Chun-Xue Li;Hong-Chi Wang;Yue-Hui Ma;Miao-Miao Zhang;Chong Li;Yu-Qing Zheng-.Molecular Clouds Associated with H Ⅱ Regions and Candidates within l=106°.65 to 109°.50 and b=?1°.85 to 0°.95)[J].天文和天体物理学研究,2022(04):71-105
A类：
Candidates,isotopologues,12CO,13CO,C18O,gravitationally,S142
B类：
Molecular,Clouds,Associated,Regions,within,We,present,large,scale,simultaneous,survey,line,emission,toward,Galactic,plane,using,Purple,Mountain,Observatory,millimeter,wavelength,telescope,Except,molecular,gas,solar,neighborhood,from,this,concentrated,velocity,range,divided,into,four,clouds,mass,have,identified,filaments,data,median,excitation,temperature,width,virial,are,pc,respectively,Among,these,eight,parameters,less,than,suggesting,that,they,bound,lead,star,formation,Nineteen,regions,candidates,previously,been,found,investigate,relationships,between,surrounding,detail,Using,morphology,similarity,radial,consistency,evidence,association,raised,broadening,signatures,interaction,propose,associated,their,In,case,energy,sufficient,maintain,turbulence
AB值：
0.489257
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