Mostrar registro simples

dc.contributor.authorBurtscher, Leonardpt_BR
dc.contributor.authorDavies, Richard I.pt_BR
dc.contributor.authorShimizu, Taropt_BR
dc.contributor.authorRiffel, Rogériopt_BR
dc.contributor.authorRosario, Davidpt_BR
dc.contributor.authorHicks, Erin K. S.pt_BR
dc.contributor.authorLin, Ming-Yipt_BR
dc.contributor.authorRiffel, Rogemar Andrépt_BR
dc.contributor.authorSchartmann, Marcpt_BR
dc.contributor.authorMüller, Allan Schnorrpt_BR
dc.contributor.authorStorchi-Bergmann, Thaisapt_BR
dc.contributor.authorXivry, Gilles Orban dept_BR
dc.contributor.authorVeilleux, Sylvainpt_BR
dc.date.accessioned2022-05-31T01:00:45Zpt_BR
dc.date.issued2021pt_BR
dc.identifier.issn0004-6361pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/239484pt_BR
dc.description.abstractThe relation between nuclear (.50 pc) star formation and nuclear galactic activity is still elusive; theoretical models predict a link between the two, but it is unclear whether active galactic nuclei (AGNs) should appear at the same time, before, or after nuclear star formation activity. We present a study of this relation in a complete, volume-limited sample of nine of the most luminous (log L14−195 keV > 1042.5 erg s−1 ) local AGNs (the LLAMA sample), including a sample of 18 inactive control galaxies (six star-forming; 12 passive) that are matched by Hubble type, stellar mass (9.5 . log M?/M . 10.5), inclination, and distance. This allows us to calibrate our methods on the control sample and perform a differential analysis between the AGN and control samples. We performed stellar population synthesis on VLT/X-shooter spectra in an aperture corresponding to a physical radius of ≈150 pc. We find young (.30 Myr) stellar populations in seven out of nine AGNs and in four out of six star-forming control galaxies. In the non-star-forming control population, in contrast, only two out of 12 galaxies show such a population. We further show that these young populations are not indicative of ongoing star formation, providing evidence for models that see AGN activity as a consequence of nuclear star formation. Based on the similar nuclear star formation histories of AGNs and star-forming control galaxies, we speculate that the latter may turn into the former for some fraction of their time. Under this assumption, and making use of the volume completeness of our sample, we infer that the AGN phase lasts for about 5% of the nuclear starburst phase.en
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofAstronomy and astrophysics. Les Ulis. Vol. 654 (Oct. 2021), A132, 36 p.pt_BR
dc.rightsOpen Accessen
dc.subjectGaláxias ativaspt_BR
dc.subjectGalaxies : Activeen
dc.subjectGalaxies : Evolutionen
dc.subjectNucleo galaticopt_BR
dc.subjectGalaxies : Nucleien
dc.subjectGalaxias seyfertpt_BR
dc.subjectGalaxies : Seyferten
dc.subjectEvolucao galaticapt_BR
dc.subjectGalaxies : Stellar contenten
dc.subjectTechniques : Spectroscopicen
dc.titleLLAMA : stellar populations in the nuclei of ultra-hard X-ray-selected AGN and matched inactive galaxiespt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb001139656pt_BR
dc.type.originEstrangeiropt_BR


Thumbnail
   

Este item está licenciado na Creative Commons License

Mostrar registro simples