NAOC Open IR
Cloud-cloud collision as drivers of the chemical complexity in Galactic Centre molecular clouds
Zeng, S.1,2,3; Zhang, Q.2; Jimenez-Serra, I4; Tercero, B.5,6; Lu, X.7; Martin-Pintado, J.4; de Vicente, P.6; Rivilla, V. M.8; Li, S.2,9,10
2020-10-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume497Issue:4Pages:4896-4909
AbstractG+0.693-0.03 is a quiescent molecular cloud located within the Sagittarius B2 (Sgr B2) star-forming complex. Recent spectral surveys have shown that it represents one of the most prolific repositories of complex organic species in the Galaxy. The origin of such chemical complexity, along with the small-scale physical structure and properties of G+0.693-0.03, remains a mystery. In this paper, we report the study of multiple molecules with interferometric observations in combination with single-dish data in G+0.693-0.03. Despite the lack of detection of continuum source, we find small-scale (0.2 pc) structures within this cloud. The analysis of the molecular emission of typical shock tracers such as SiO, HNCO, and CH3OH unveiled two molecular components, peaking at velocities of 57 and 75 km s(-1). They are found to be interconnected in both space and velocity. The position-velocity diagrams show features that match with the observational signatures of a cloud-cloud collision. Additionally, we detect three series of class I methanol masers known to appear in shocked gas, supporting the cloud-cloud collision scenario. From the maser emission we provide constraints on the gas kinetic temperatures (similar to 30-150 K) and H-2 densities (10(4)-10(5) cm(-2)). These properties are similar to those found for the starburst galaxy NGC 253 also using class I methanol masers, suggested to be associated with a cloud-cloud collision. We conclude that shocks driven by the possible cloud-cloud collision is likely the most important mechanism responsible for the high level of chemical complexity observed in G+0.693-0.03.
KeywordISM: clouds ISM: kinematics and dynamics ISM: molecules Galaxy: centre
Funding OrganizationNational Geographic Institute of Spain (IGN) at Yebes Observatory ; National Geographic Institute of Spain (IGN) at Yebes Observatory ; ERC ; ERC ; Queen Mary University of London - Harvard-Smithsonian Center for Astrophysics ; Queen Mary University of London - Harvard-Smithsonian Center for Astrophysics ; Spanish FEDER ; Spanish FEDER ; European Union'sHorizon 2020 research and innovation programme under the Marie SklodowskaCurie grant ; European Union'sHorizon 2020 research and innovation programme under the Marie SklodowskaCurie grant ; JSPS KAKENHI ; JSPS KAKENHI ; National Geographic Institute of Spain (IGN) at Yebes Observatory ; National Geographic Institute of Spain (IGN) at Yebes Observatory ; ERC ; ERC ; Queen Mary University of London - Harvard-Smithsonian Center for Astrophysics ; Queen Mary University of London - Harvard-Smithsonian Center for Astrophysics ; Spanish FEDER ; Spanish FEDER ; European Union'sHorizon 2020 research and innovation programme under the Marie SklodowskaCurie grant ; European Union'sHorizon 2020 research and innovation programme under the Marie SklodowskaCurie grant ; JSPS KAKENHI ; JSPS KAKENHI ; National Geographic Institute of Spain (IGN) at Yebes Observatory ; National Geographic Institute of Spain (IGN) at Yebes Observatory ; ERC ; ERC ; Queen Mary University of London - Harvard-Smithsonian Center for Astrophysics ; Queen Mary University of London - Harvard-Smithsonian Center for Astrophysics ; Spanish FEDER ; Spanish FEDER ; European Union'sHorizon 2020 research and innovation programme under the Marie SklodowskaCurie grant ; European Union'sHorizon 2020 research and innovation programme under the Marie SklodowskaCurie grant ; JSPS KAKENHI ; JSPS KAKENHI ; National Geographic Institute of Spain (IGN) at Yebes Observatory ; National Geographic Institute of Spain (IGN) at Yebes Observatory ; ERC ; ERC ; Queen Mary University of London - Harvard-Smithsonian Center for Astrophysics ; Queen Mary University of London - Harvard-Smithsonian Center for Astrophysics ; Spanish FEDER ; Spanish FEDER ; European Union'sHorizon 2020 research and innovation programme under the Marie SklodowskaCurie grant ; European Union'sHorizon 2020 research and innovation programme under the Marie SklodowskaCurie grant ; JSPS KAKENHI ; JSPS KAKENHI
DOI10.1093/mnras/staa2187
WOS KeywordI METHANOL MASERS ; SAGITTARIUS B2 ; STAR-FORMATION ; ISOLATING SIGNATURES ; ORGANIC-MOLECULES ; EVOLUTION ; REGION ; SPECTROSCOPY ; KINEMATICS ; MILLIMETER
Language英语
Funding ProjectNational Geographic Institute of Spain (IGN) at Yebes Observatory[20A008] ; ERC[ERC-2013-Syg-610256-NANOCOSMOS] ; Queen Mary University of London - Harvard-Smithsonian Center for Astrophysics ; Spanish FEDER[ESP2017-86582-C4-1-R] ; European Union'sHorizon 2020 research and innovation programme under the Marie SklodowskaCurie grant[664931] ; JSPS KAKENHI[18K13589] ; JSPS KAKENHI[20K14528]
Funding OrganizationNational Geographic Institute of Spain (IGN) at Yebes Observatory ; National Geographic Institute of Spain (IGN) at Yebes Observatory ; ERC ; ERC ; Queen Mary University of London - Harvard-Smithsonian Center for Astrophysics ; Queen Mary University of London - Harvard-Smithsonian Center for Astrophysics ; Spanish FEDER ; Spanish FEDER ; European Union'sHorizon 2020 research and innovation programme under the Marie SklodowskaCurie grant ; European Union'sHorizon 2020 research and innovation programme under the Marie SklodowskaCurie grant ; JSPS KAKENHI ; JSPS KAKENHI ; National Geographic Institute of Spain (IGN) at Yebes Observatory ; National Geographic Institute of Spain (IGN) at Yebes Observatory ; ERC ; ERC ; Queen Mary University of London - Harvard-Smithsonian Center for Astrophysics ; Queen Mary University of London - Harvard-Smithsonian Center for Astrophysics ; Spanish FEDER ; Spanish FEDER ; European Union'sHorizon 2020 research and innovation programme under the Marie SklodowskaCurie grant ; European Union'sHorizon 2020 research and innovation programme under the Marie SklodowskaCurie grant ; JSPS KAKENHI ; JSPS KAKENHI ; National Geographic Institute of Spain (IGN) at Yebes Observatory ; National Geographic Institute of Spain (IGN) at Yebes Observatory ; ERC ; ERC ; Queen Mary University of London - Harvard-Smithsonian Center for Astrophysics ; Queen Mary University of London - Harvard-Smithsonian Center for Astrophysics ; Spanish FEDER ; Spanish FEDER ; European Union'sHorizon 2020 research and innovation programme under the Marie SklodowskaCurie grant ; European Union'sHorizon 2020 research and innovation programme under the Marie SklodowskaCurie grant ; JSPS KAKENHI ; JSPS KAKENHI ; National Geographic Institute of Spain (IGN) at Yebes Observatory ; National Geographic Institute of Spain (IGN) at Yebes Observatory ; ERC ; ERC ; Queen Mary University of London - Harvard-Smithsonian Center for Astrophysics ; Queen Mary University of London - Harvard-Smithsonian Center for Astrophysics ; Spanish FEDER ; Spanish FEDER ; European Union'sHorizon 2020 research and innovation programme under the Marie SklodowskaCurie grant ; European Union'sHorizon 2020 research and innovation programme under the Marie SklodowskaCurie grant ; JSPS KAKENHI ; JSPS KAKENHI
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000587739300066
PublisherOXFORD UNIV PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/80814
Collection中国科学院国家天文台
Corresponding AuthorZeng, S.
Affiliation1.Queen Mary Univ London, Sch Phys & Astron, Mile End Rd, London E1 4NS, England
2.Harvard & Smithsonian, Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA
3.RIKEN Cluster Pioneering Res, Star & Planet Format Lab, 2-1 Hirosawa, Wako, Saitama 3510198, Japan
4.Cenito Astrobiol CSIC INTA, Carretera Ajalvir,Km 4, Madrid 28850, Spain
5.Observ Astron Nacl OAN IGN, Calle Alfonso XII 3, Madrid 28014, Spain
6.Observ Yebes IGN, Cerro Palera S-N, Guadalajara 19141, Spain
7.Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan
8.INAF, Osservatorio Astrofis Arcetri, Largo Enrico Fermi 5, I-50125 Florence, Italy
9.Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China
10.Univ Chinese Acad Sci, 19A Yuquanlu, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Zeng, S.,Zhang, Q.,Jimenez-Serra, I,et al. Cloud-cloud collision as drivers of the chemical complexity in Galactic Centre molecular clouds[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2020,497(4):4896-4909.
APA Zeng, S..,Zhang, Q..,Jimenez-Serra, I.,Tercero, B..,Lu, X..,...&Li, S..(2020).Cloud-cloud collision as drivers of the chemical complexity in Galactic Centre molecular clouds.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,497(4),4896-4909.
MLA Zeng, S.,et al."Cloud-cloud collision as drivers of the chemical complexity in Galactic Centre molecular clouds".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 497.4(2020):4896-4909.
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