File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Structure and kinematics of CO J = 2-1 emission in the central region of NGC 4258

TitleStructure and kinematics of CO J = 2-1 emission in the central region of NGC 4258
Authors
KeywordsGalaxies: Active
Galaxies: Individual (Ngc 4258)
Galaxies: Nuclei
Galaxies: Seyfert
Issue Date2007
PublisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/2041-8205
Citation
Astrophysical Journal Letters, 2007, v. 658 n. 2 I, p. 851-858 How to Cite?
AbstractWe present 12CO J = 2-1 observations toward the central region of the type 2 Seyfert galaxy NGC 4258 with the Submillimeter Array (SMA). Our interferometric maps show two armlike elongated components along the major axis of the galaxy, with no strong nuclear concentration. The CO(2-1) morphology and kinematics are similar to previous CO(1-0) results. The velocity field of the components agrees with the general galactic rotation, except for the east elongated component, which shows a significant velocity gradient along the east-west direction. In order to account for the velocity field, we propose a kinematical model in which the warped rotating disk is also expanding. The line ratio of CO(2-1)/CO(1-0) reveals that the eastern component with the anomalous velocity gradient appears to be warmer and denser. This is consistent with the gas in this component being closer to the center, being heated by the central activities, and possibly interacting with expanding motions from the nuclear region. © 2007. The American Astronomical Society. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/175061
ISSN
2015 Impact Factor: 5.487
2015 SCImago Journal Rankings: 3.369
References

 

DC FieldValueLanguage
dc.contributor.authorSawadaSatoh, Sen_US
dc.contributor.authorHo, PTPen_US
dc.contributor.authorMuller, Sen_US
dc.contributor.authorMatsushita, Sen_US
dc.contributor.authorLim, Jen_US
dc.date.accessioned2012-11-26T08:49:02Z-
dc.date.available2012-11-26T08:49:02Z-
dc.date.issued2007en_US
dc.identifier.citationAstrophysical Journal Letters, 2007, v. 658 n. 2 I, p. 851-858en_US
dc.identifier.issn2041-8205en_US
dc.identifier.urihttp://hdl.handle.net/10722/175061-
dc.description.abstractWe present 12CO J = 2-1 observations toward the central region of the type 2 Seyfert galaxy NGC 4258 with the Submillimeter Array (SMA). Our interferometric maps show two armlike elongated components along the major axis of the galaxy, with no strong nuclear concentration. The CO(2-1) morphology and kinematics are similar to previous CO(1-0) results. The velocity field of the components agrees with the general galactic rotation, except for the east elongated component, which shows a significant velocity gradient along the east-west direction. In order to account for the velocity field, we propose a kinematical model in which the warped rotating disk is also expanding. The line ratio of CO(2-1)/CO(1-0) reveals that the eastern component with the anomalous velocity gradient appears to be warmer and denser. This is consistent with the gas in this component being closer to the center, being heated by the central activities, and possibly interacting with expanding motions from the nuclear region. © 2007. The American Astronomical Society. All rights reserved.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: Activeen_US
dc.subjectGalaxies: Individual (Ngc 4258)en_US
dc.subjectGalaxies: Nucleien_US
dc.subjectGalaxies: Seyferten_US
dc.titleStructure and kinematics of CO J = 2-1 emission in the central region of NGC 4258en_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.doi10.1086/511762en_US
dc.identifier.scopuseid_2-s2.0-34247192513en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-34247192513&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume658en_US
dc.identifier.issue2 Ien_US
dc.identifier.spage851en_US
dc.identifier.epage858en_US
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridSawadaSatoh, S=6603503908en_US
dc.identifier.scopusauthoridHo, PTP=7402211489en_US
dc.identifier.scopusauthoridMuller, S=15071043100en_US
dc.identifier.scopusauthoridMatsushita, S=7201408992en_US
dc.identifier.scopusauthoridLim, J=7403453870en_US

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats