NAOC Open IR
Using CO line ratios to trace compressed areas in bubble N131
Zhang, Chuan-Peng1,2,5; Li, Guang-Xing3; Zhou, Chenlin1,4,5; Yuan, Lixia1,4,5; Zhu, Ming1,5
2019-11-01
Source PublicationASTRONOMY & ASTROPHYSICS
ISSN0004-6361
Volume631Pages:6
AbstractAims. N131 is a typical infrared dust bubble showing an expanding ring-like shell. We study the CO line ratios that can be used to trace the interaction in the expanding bubble. Methods. We carried out new CO (3-2) observations toward bubble N131 using the 15 m JCMT, and derived line ratios by combining these observations with our previous CO (2-1) and CO (1-0) data from IRAM 30 m observations. To trace the interaction between the molecular gas and the ionized gas in the HII region, we used RADEX to model the dependence of the CO line ratios on kinetic temperature and H-2 volume density, and examined the abnormal line ratios based on other simulations. Results. We present CO (3-2), CO (2-1), and CO (1-0) integrated intensity maps convolved to the same angular resolution (22.5 ''). The three different CO transition maps show a similar morphology. The line ratios of WCO(3-2)/WCO(2-1) mostly range from 0.2 to 1.2 with a median of 0.54 +/- 0.12, while the line ratios of WCO(2-1)/WCO(1-0) range from 0.5 to 1.6 with a median of 0.84 +/- 0.15. The high CO line ratios WCO(3-2)/WCO(2-1) greater than or similar to 0.8 and WCO(2-1)/WCO(1-0) greater than or similar to 1.2 are beyond the threshold predicted by numerical simulations based on the assumed density-temperature structure for the inner rims of the ring-like shell, where the compressed areas are located in bubble N131. Conclusions. These high CO integrated intensity ratios, such as WCO(3-2)/WCO(2-1) greater than or similar to 0.8 and WCO(2-1)/WCO(1-0) greater than or similar to 1.2, can be used as a tracer of gas-compressed regions with a relatively high temperature and density. This further suggests that the non-Gaussian part of the line-ratio distribution can be used to trace the interaction between the molecular gas and the hot gas in the bubble.
KeywordISM: bubbles infrared: ISM stars: formation molecular data ISM: individual objects: N131
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Basic Research Program of China (973 Program) ; National Key Basic Research Program of China (973 Program) ; MPG-CAS Joint Doctoral Promotion Program (DPP) ; MPG-CAS Joint Doctoral Promotion Program (DPP) ; China Scholarship Council (CSC) in Germany ; China Scholarship Council (CSC) in Germany ; National Key R&D Program of China ; National Key R&D Program of China ; STFC ; STFC ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Basic Research Program of China (973 Program) ; National Key Basic Research Program of China (973 Program) ; MPG-CAS Joint Doctoral Promotion Program (DPP) ; MPG-CAS Joint Doctoral Promotion Program (DPP) ; China Scholarship Council (CSC) in Germany ; China Scholarship Council (CSC) in Germany ; National Key R&D Program of China ; National Key R&D Program of China ; STFC ; STFC ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Basic Research Program of China (973 Program) ; National Key Basic Research Program of China (973 Program) ; MPG-CAS Joint Doctoral Promotion Program (DPP) ; MPG-CAS Joint Doctoral Promotion Program (DPP) ; China Scholarship Council (CSC) in Germany ; China Scholarship Council (CSC) in Germany ; National Key R&D Program of China ; National Key R&D Program of China ; STFC ; STFC ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Basic Research Program of China (973 Program) ; National Key Basic Research Program of China (973 Program) ; MPG-CAS Joint Doctoral Promotion Program (DPP) ; MPG-CAS Joint Doctoral Promotion Program (DPP) ; China Scholarship Council (CSC) in Germany ; China Scholarship Council (CSC) in Germany ; National Key R&D Program of China ; National Key R&D Program of China ; STFC ; STFC
DOI10.1051/0004-6361/201936063
WOS KeywordMILKY-WAY ; MOLECULAR GAS ; GALACTIC PLANE ; DATA RELEASE ; GALAXIES ; CLOUDS ; J=2-1 ; DISK
Language英语
Funding ProjectNational Natural Science Foundation of China[11703040] ; National Natural Science Foundation of China[11743007] ; National Natural Science Foundation of China[U1531246] ; National Key Basic Research Program of China (973 Program)[2015CB857101] ; MPG-CAS Joint Doctoral Promotion Program (DPP) ; China Scholarship Council (CSC) in Germany ; National Key R&D Program of China[2017YFA0402700] ; STFC
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Basic Research Program of China (973 Program) ; National Key Basic Research Program of China (973 Program) ; MPG-CAS Joint Doctoral Promotion Program (DPP) ; MPG-CAS Joint Doctoral Promotion Program (DPP) ; China Scholarship Council (CSC) in Germany ; China Scholarship Council (CSC) in Germany ; National Key R&D Program of China ; National Key R&D Program of China ; STFC ; STFC ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Basic Research Program of China (973 Program) ; National Key Basic Research Program of China (973 Program) ; MPG-CAS Joint Doctoral Promotion Program (DPP) ; MPG-CAS Joint Doctoral Promotion Program (DPP) ; China Scholarship Council (CSC) in Germany ; China Scholarship Council (CSC) in Germany ; National Key R&D Program of China ; National Key R&D Program of China ; STFC ; STFC ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Basic Research Program of China (973 Program) ; National Key Basic Research Program of China (973 Program) ; MPG-CAS Joint Doctoral Promotion Program (DPP) ; MPG-CAS Joint Doctoral Promotion Program (DPP) ; China Scholarship Council (CSC) in Germany ; China Scholarship Council (CSC) in Germany ; National Key R&D Program of China ; National Key R&D Program of China ; STFC ; STFC ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Basic Research Program of China (973 Program) ; National Key Basic Research Program of China (973 Program) ; MPG-CAS Joint Doctoral Promotion Program (DPP) ; MPG-CAS Joint Doctoral Promotion Program (DPP) ; China Scholarship Council (CSC) in Germany ; China Scholarship Council (CSC) in Germany ; National Key R&D Program of China ; National Key R&D Program of China ; STFC ; STFC
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000515096100002
PublisherEDP SCIENCES S A
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/54483
Collection中国科学院国家天文台
Corresponding AuthorZhang, Chuan-Peng
Affiliation1.Chinese Acad Sci, Natl Astron Observ, Beijing 100101, Peoples R China
2.Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany
3.Yunnan Univ, South Western Inst Astron Res, Kunming 650500, Yunnan, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
5.Chinese Acad Sci, Natl Astron Observ, CAS Key Lab FAST, Beijing 100101, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Chuan-Peng,Li, Guang-Xing,Zhou, Chenlin,et al. Using CO line ratios to trace compressed areas in bubble N131[J]. ASTRONOMY & ASTROPHYSICS,2019,631:6.
APA Zhang, Chuan-Peng,Li, Guang-Xing,Zhou, Chenlin,Yuan, Lixia,&Zhu, Ming.(2019).Using CO line ratios to trace compressed areas in bubble N131.ASTRONOMY & ASTROPHYSICS,631,6.
MLA Zhang, Chuan-Peng,et al."Using CO line ratios to trace compressed areas in bubble N131".ASTRONOMY & ASTROPHYSICS 631(2019):6.
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