Mostrar registro simples

dc.contributor.authorRiffel, Rogériopt_BR
dc.contributor.authorRodriguez-Ardila, Albertopt_BR
dc.contributor.authorAleman, Isabel Regina Guerrapt_BR
dc.contributor.authorBrotherton, Mikept_BR
dc.contributor.authorPastoriza, Miriani Griseldapt_BR
dc.contributor.authorBonatto, Charles Josept_BR
dc.contributor.authorDors Júnior, Oli Luizpt_BR
dc.date.accessioned2014-04-13T01:49:58Zpt_BR
dc.date.issued2013pt_BR
dc.identifier.issn0035-8711pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/93378pt_BR
dc.description.abstractWe study the kinematics and excitation mechanisms of H2 and [Fe II] lines in a sample of 67 emission-line galaxies with Infrared Telescope Facility SpeX near-infrared (0.8–2.4 μm) spectroscopy together with new photoionization models. H2 emission lines are systematically narrower than narrow-line region lines, suggesting that the two are, very likely, kinematically disconnected. The new models and emission-line ratios show that the thermal excitation plays an important role not only in active galactic nuclei but also in star-forming galaxies. The importance of the thermal excitation in star-forming galaxies may be associated with the presence of supernova remnants close to the region emitting H2 lines. This hypothesis is further supported by the similarity between vibrational and rotational temperatures of H2. We confirm that the diagram involving the line ratios H2 2.121 μm/Brγ and [Fe II] 1.257 μm/Paβ is an efficient tool for separating emission-line objects according to their dominant types of activities.We suggest new limits to the line ratios in order to discriminate between the different types of nuclear activities.en
dc.format.mimetypeapplication/pdf
dc.language.isoengpt_BR
dc.relation.ispartofMonthly notices of the royal astronomical society. Oxford. Vol. 430, no. 3 (Apr. 2013), p. 2002-2017pt_BR
dc.rightsOpen Accessen
dc.subjectGalaxias seyfertpt_BR
dc.subjectLine: formationen
dc.subjectGaláxias ativaspt_BR
dc.subjectMolecular processesen
dc.subjectGalaxies: seyferten
dc.subjectNucleo galaticopt_BR
dc.subjectMoléculas neutras de hidrogêniopt_BR
dc.subjectInfrared: galaxiesen
dc.subjectMoleculas interestelarespt_BR
dc.subjectEspectros astronômicospt_BR
dc.titleMolecular hydrogen and [Fe II] in active galactic nuclei – III. Low-ionization nuclear emission-line region and star-forming galaxiespt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000902799pt_BR
dc.type.originEstrangeiropt_BR


Thumbnail
Thumbnail
   

Este item está licenciado na Creative Commons License

Mostrar registro simples