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Submillimeter array (CO)-C-12 (J=3-2) interferometric observations of the central region of M51
Matsushita, S; Sakamoto, K; Kuo, CY; Hsieh, PY; Trung, DV; Mao, RQ; Iono, D; Peck, AB; Wiedner, MC; Liu, SY; Ohashi, N; Lim, J
2004-11-20
Source PublicationASTROPHYSICAL JOURNAL
Volume616Issue:1Pages:L55-L58
AbstractWe present the first interferometric (CO)-C-12 (J = 3-2) observations (beam size of 3."9 x 1."6 or 160 x 65 pc) with the Submillimeter Array (SMA) toward the center of the Seyfert 2 galaxy M51. The image shows a strong concentration at the nucleus and weak emission from the spiral arm to the northwest. The integrated intensity of the central component in (CO)-C-12 (J = 3-2) is almost twice as high as that in (CO)-C-12 (J = 1-0), indicating that the molecular gas within an similar to80 pc radius of the nucleus is warm (greater than or similar to100 K) and dense (similar to10(4) cm(-3)). Similar intensity ratios are seen in shocked regions in our Galaxy, suggesting that these gas properties may be related to active galactic nucleus or starburst activity. The central component shows a linear velocity gradient (similar to1.4 km s(-1) pc(-1)) perpendicular to the radio continuum jet, similar to that seen in previous observations and interpreted as a circumnuclear molecular disk/torus around the Seyfert 2 nucleus. In addition, we identify a linear velocity gradient (0.7 km s(-1) pc(-1)) along the jet. Judging from the energetics, the velocity gradient can be explained by supernova explosions or energy and momentum transfer from the jet to the molecular gas via interaction, which is consistent with the high-intensity ratio.
KeywordGalaxies : Individual (M51, Ngc 5194) Galaxies : Ism Galaxies : Nuclei Galaxies : Seyfert Ism : Jets And Outflows
WOS HeadingsScience & Technology ; Physical Sciences
WOS KeywordDENSE MOLECULAR GAS ; NEARBY GALAXIES ; SPIRAL GALAXIES ; ACTIVE NUCLEUS ; STAR-FORMATION ; CO ; EMISSION ; NGC-1068 ; KINEMATICS ; EXCITATION
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000225199800014
Citation statistics
Cited Times:31[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/15842
Collection南极天文中心
Affiliation1.Acad Sinica, Inst Astron & Astrophys, Taipei 106, Taiwan
2.Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA
3.Natl Taiwan Normal Univ, Dept Phys, Taipei 116, Taiwan
4.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
5.Univ Massachusetts, Dept Astron, Amherst, MA 01003 USA
6.Univ Cologne, Inst Phys, D-50937 Cologne, Germany
Recommended Citation
GB/T 7714
Matsushita, S,Sakamoto, K,Kuo, CY,et al. Submillimeter array (CO)-C-12 (J=3-2) interferometric observations of the central region of M51[J]. ASTROPHYSICAL JOURNAL,2004,616(1):L55-L58.
APA Matsushita, S.,Sakamoto, K.,Kuo, CY.,Hsieh, PY.,Trung, DV.,...&Lim, J.(2004).Submillimeter array (CO)-C-12 (J=3-2) interferometric observations of the central region of M51.ASTROPHYSICAL JOURNAL,616(1),L55-L58.
MLA Matsushita, S,et al."Submillimeter array (CO)-C-12 (J=3-2) interferometric observations of the central region of M51".ASTROPHYSICAL JOURNAL 616.1(2004):L55-L58.
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