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lambda=2 mm spectroscopy observations toward the circumnuclear disk of NGC 1068
Qiu, Jianjie1; Zhang, Jiangshui2; Zhang, Yong1,3; Jia, Lanwei2; Tang, Xindi4,5,6
2020-02-21
Source PublicationASTRONOMY & ASTROPHYSICS
ISSN0004-6361
Volume634Issue:0Pages:22
Abstract

Aims. We investigate the physical and chemical conditions of molecular gas in the circumnuclear disk (CND) region of NGC 1068.Methods. We carried out a spectral line survey with the IRAM 30 m telescope toward the center of NGC 1068 and mainly focused on the 2 mm band with a frequency coverage of 160.7-168.6 GHz and 176.5-184.3 GHz.Results. Fifteen lines are detected in NGC 1068, eight of which are new detections for this galaxy. We derive the rotation temperatures and column densities of fourteen molecular species.Conclusions. Based on the [HCO+ (2-1)]/[HOC+ (2-1)] ratio, we obtain a high ionization degree in the CND of NGC 1068. It is found that HC3N is concentrated in the east knot, while (CCH)-C-13, CH3CN, SO, HOC+, CS, CH3CCH, and H2CO are concentrated in the west knot. Compared to the star-forming galaxies M 82 and NGC 253, the chemistry of NGC 1068 might be less strongly affected by the UV radiation field, and its kinetic temperature might be lower.

KeywordISM: molecules galaxies: ISM galaxies: individual: NGC 1068 galaxies: nuclei galaxies: active
DOI10.1051/0004-6361/201935800
WOS KeywordDENSE MOLECULAR GAS ; HNC LINE EMISSION ; X-RAY ; ACTIVE NUCLEUS ; REACTIVE IONS ; GALAXIES ; CHEMISTRY ; HOC+ ; HCN ; ABUNDANCE
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000517308400001
PublisherEDP SCIENCES S A
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/36181
Collection中国科学院紫金山天文台
Corresponding AuthorQiu, Jianjie
Affiliation1.Sun Yat Sen Univ, Sch Phys & Astron, Guangzhou 510275, Peoples R China
2.Guangzhou Univ, Ctr Astrophys, Guangzhou 510006, Peoples R China
3.Univ Hong Kong, Lab Space Res, Hong Kong, Peoples R China
4.Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany
5.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China
6.Chinese Acad Sci, Key Lab Radio Astron, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Qiu, Jianjie,Zhang, Jiangshui,Zhang, Yong,et al. lambda=2 mm spectroscopy observations toward the circumnuclear disk of NGC 1068[J]. ASTRONOMY & ASTROPHYSICS,2020,634(0):22.
APA Qiu, Jianjie,Zhang, Jiangshui,Zhang, Yong,Jia, Lanwei,&Tang, Xindi.(2020).lambda=2 mm spectroscopy observations toward the circumnuclear disk of NGC 1068.ASTRONOMY & ASTROPHYSICS,634(0),22.
MLA Qiu, Jianjie,et al."lambda=2 mm spectroscopy observations toward the circumnuclear disk of NGC 1068".ASTRONOMY & ASTROPHYSICS 634.0(2020):22.
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