Today:
There are no scheduled talks today.
Upcoming:
Euler Characteristics and Anomaly Cancellation
Monica Jinwoo Kang
Mon, 23 Apr 2018, 14:00
Gravity matters: from gravitational waves to dark matter
Prof. Xavier Calmet
Mon, 23 Apr 2018, 16:30
Precision in EFT studies for top quark and Higgs physics
Eleni Vryonidou
Tue, 24 Apr 2018, 14:15

Active galaxies in the local universe: feedback, variability, and triggering

Rebecca McElroy , MPIA
This talk investigates the coevolution of galaxies and their super massive black holes. We use spatially resolved spectroscopic data to search for evidence of AGN feedback and triggering. Using observations from the AAT's SPIRAL instrument we show that outflows are prevalent in luminous local type 2 AGN. We use multiple component Gaussian emission line modelling to disentangle the kinematic and ionisation properties of these outflows. This allows us to show that shock-like emission is present in these galaxies, demonstrating that the outflows are directly impacting the surrounding ISM within the galaxies.

We show that AGN Mrk 1018 has changed spectral type for a second time, making it one of only three 'changing look' AGN that have undergone a transition twice. When we observed Mrk 1018 as part of The Close AGN Reference Survey (CARS) we noticed that the broad lines and continuum emission had dramatically decreased. We show that this recent change cannot be explained by variable obscuration along the line of sight to the AGN or temporary fuelling by a TDE. We conclude that the most likely cause is a disruption in the fuel supply to the accretion disk caused either by a wind in the BLR or a nearby massive object.

Using MUSE-VLT data from CARS we search for evidence of AGN triggering by mergers or interactions. We measure the stellar kinematics of our active galaxies and a mass matched sample of inactive galaxies from CALIFA. We then measure the deviation from disk like rotation using KINEMETRY (Krajnovic et al. 2006). By comparing these two samples we show that the AGN have a slight enhancement in large scale asymmetry.
Königstuhl Colloquium
23 Feb 2018, 15:00
Max-Planck-Institut für Astronomie, Level 3 Lecture Hall (301)

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