The AGN/galaxy coevolution in the local Universe: what is the role of type 2 AGN (Federica Ricci; Universita degli studi Roma Tre & ESO Chile)

Desde Mayo 10, 2017 13:15 hasta Mayo 10, 2017 13:45

En Instituto de Astrofísica, Pontificia Universidad Católica, Vicuña Mackenna 4860, Santiago, Chile

Categorías: Seminarios

Nowadays there is growing observational evidence that type 1 and type 2 AGN are actually characterised by intrinsically different properties. In the past years, in the framework of the verification of the AGN unified model, there have been several attempts to detect faint broad emission lines in type 2 AGN with both NIR and polarised spectroscopy. We here present the results from a systematic study performed using deep NIR (VLT and LBT) spectroscopy of a sample of ~40 type 2 AGN, drawn from the complete SWIFT/BAT 70-month hard (14-195 keV) X-ray selected sample. Thanks to our new virial relation based on unbiased physical quantities, i.e. hard X-ray luminosity and Pa? emission line FWHM, we have been able to measure for the first time in a virial way also the supermassive black hole mass (BH) of type 2 AGN, whose values have been up today estimated using indirect proxies (e.g. from scaling relations). With direct virial masses for type 2 AGN, we discuss, for the first time, if the BH-host galaxy scaling relations hold for our type 2 AGN, thus putting a missing piece to the AGN/galaxy co-evolution puzzle.