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Article: Submillimeter array 12CO (J = 3-2) interferometric observations of the central region of M51

TitleSubmillimeter array 12CO (J = 3-2) interferometric observations of the central region of M51
Authors
KeywordsGalaxies: Individual (M51, Ngc 5194)
Galaxies: Ism
Galaxies: Nuclei
Galaxies: Seyfert
Ism: Jets And Outflows
Issue Date2004
PublisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/2041-8205
Citation
Astrophysical Journal Letters, 2004, v. 616 n. 1 II, p. L55-L58 How to Cite?
AbstractWe present the first interferometric 12CO (J = 3-2) observations (beam size of 3″.9 × 1″.6 or 160 × 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 12CO (J = 3-2) is almost twice as high as that in 12CO (J = 1-0), indicating that the molecular gas within an ∼80 pc radius of the nucleus is warm (≳100 K) and dense (∼10 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 (∼1.4 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.
Persistent Identifierhttp://hdl.handle.net/10722/174926
ISSN
2015 Impact Factor: 5.487
2015 SCImago Journal Rankings: 3.369
References

 

DC FieldValueLanguage
dc.contributor.authorMatsushita, Sen_US
dc.contributor.authorSakamoto, Ken_US
dc.contributor.authorKuo, CYen_US
dc.contributor.authorHsieh, PYen_US
dc.contributor.authorTrung, DVen_US
dc.contributor.authorMao, RQen_US
dc.contributor.authorIono, Den_US
dc.contributor.authorPeck, ABen_US
dc.contributor.authorWiedner, MCen_US
dc.contributor.authorLiu, SYen_US
dc.contributor.authorOhashi, Nen_US
dc.contributor.authorLim, Jen_US
dc.date.accessioned2012-11-26T08:48:11Z-
dc.date.available2012-11-26T08:48:11Z-
dc.date.issued2004en_US
dc.identifier.citationAstrophysical Journal Letters, 2004, v. 616 n. 1 II, p. L55-L58en_US
dc.identifier.issn2041-8205en_US
dc.identifier.urihttp://hdl.handle.net/10722/174926-
dc.description.abstractWe present the first interferometric 12CO (J = 3-2) observations (beam size of 3″.9 × 1″.6 or 160 × 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 12CO (J = 3-2) is almost twice as high as that in 12CO (J = 1-0), indicating that the molecular gas within an ∼80 pc radius of the nucleus is warm (≳100 K) and dense (∼10 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 (∼1.4 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.en_US
dc.languageengen_US
dc.publisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/2041-8205en_US
dc.relation.ispartofAstrophysical Journal Lettersen_US
dc.subjectGalaxies: Individual (M51, Ngc 5194)en_US
dc.subjectGalaxies: Ismen_US
dc.subjectGalaxies: Nucleien_US
dc.subjectGalaxies: Seyferten_US
dc.subjectIsm: Jets And Outflowsen_US
dc.titleSubmillimeter array 12CO (J = 3-2) interferometric observations of the central region of M51en_US
dc.typeArticleen_US
dc.identifier.emailLim, J: jjlim@hku.hken_US
dc.identifier.authorityLim, J=rp00745en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.scopuseid_2-s2.0-12344287430en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-12344287430&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume616en_US
dc.identifier.issue1 IIen_US
dc.identifier.spageL55en_US
dc.identifier.epageL58en_US
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridMatsushita, S=7201408992en_US
dc.identifier.scopusauthoridSakamoto, K=7403538433en_US
dc.identifier.scopusauthoridKuo, CY=24449062500en_US
dc.identifier.scopusauthoridHsieh, PY=9841991200en_US
dc.identifier.scopusauthoridTrung, DV=6701469660en_US
dc.identifier.scopusauthoridMao, RQ=8918753900en_US
dc.identifier.scopusauthoridIono, D=6603122276en_US
dc.identifier.scopusauthoridPeck, AB=7102267982en_US
dc.identifier.scopusauthoridWiedner, MC=6603186294en_US
dc.identifier.scopusauthoridLiu, SY=7409459358en_US
dc.identifier.scopusauthoridOhashi, N=7202558313en_US
dc.identifier.scopusauthoridLim, J=7403453870en_US

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