J/A+A/654/A132ivo://CDS.VizieR/J/A+A/654/A132doi:10.26093/cds/vizier.36540132CDSBurtscher L.Davies R.I.Shimizu T.T.Riffel R.Rosario D.J.,Hicks E.K.S.Lin M.-Y.Riffel R.A.Schartmann M.Schnorr-Mueller A.,Storchi-Bergmann T.Orban de Xivry G.Veilleux S.2022-01-19T13:07:21Z2021-10-22T10:16:05ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.fractive-galactic-nucleispectroscopyultraviolet-astronomyvisible-astronomyinfrared-astronomyThe relation between nuclear (<~50pc) 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_L14-195keV_>10^42.5^erg/s) 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<~logM*/M_{sun}_<~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 ~150pc. We find young (<~30Myr) 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.2021A&A...654A.132Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/654/A132CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/654/A132https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/654/A132http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/654/A132https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/654/A132https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/654/A132http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/654/A132GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/654/A132/table2 (All observations)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/654/A132/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/654/A132/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/654/A132/table2?GETtext/xml+votable180.050000true88.0474003-7.45624720.0055555555555555566/4149 8196 8256 17286 17855 21450 24740 24949 27514 27723 27861 33802 35995 36236 37222 38268 38653 38814 39035 40221 40410 41136 41999 42120 44660 46399 46987https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/654/A132?format=asciiUVOpticalInfrareddefaultJ/A+A/654/A132/table2All observationsSimbadNameSimbad column added by the CDSmeta.idcharnullableFlag[0/1]? Flag (1)meta.code.errorintnullablespShow the spectrummeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintType[AI] A for AGN, I for inactive galaxiesmeta.codecharOBName of ESO observing blockmeta.id;meta.maincharObs.datDate of night begantime.epochnullableSeeing? Seeingarcsecinstr.obsty.seeingfloatnullableParAngleParallactic angle at the start of the observationdegpos.posAngfloatFileNameName fo the spectrum file in subdirectory spmeta.id;meta.filechar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main