The Close AGN Reference Survey (CARS). Tracing the circumnuclear star formation in the super-Eddington NLS1 Mrk 1044

Publication date: 
Main author: 
Winkel, N.
IAA authors: 
Pérez-Torres, M.
Winkel, N.;Husemann, B.;Davis, T. A.;Smirnova-Pinchukova, I.;Bennert, V. N.;Combes, F.;Gaspari, M.;Jahnke, K.;Neumann, J.;O'Dea, C. P.;Pérez-Torres, M.;Singha, M.;Tremblay, G. R.;Rix, H. W.
Astronomy and Astrophysics
Publication type: 
Context. The host galaxy conditions for rapid supermassive black hole growth are poorly understood. Narrow-line Seyfert 1 (NLS1) galaxies often exhibit high accretion rates and are hypothesized to be prototypes of active galactic nuclei (AGN) at an early stage of their evolution. <BR /> Aims: We present adaptive optics (AO) assisted VLT MUSE NFM observations of Mrk 1044, the nearest super-Eddington accreting NLS1. Together with archival MUSE WFM data, we aim to understand the host galaxy processes that drive Mrk 1044's black hole accretion. <BR /> Methods: We extracted the faint stellar continuum emission from the AGN-deblended host and performed spatially resolved emission line diagnostics with an unprecedented resolution. Combining both MUSE WFM and NFM-AO observations, we used a kinematic model of a thin rotating disk to trace the stellar and ionized gas motion from 10 kpc galaxy scales down to ∼30 pc around the nucleus. <BR /> Results: Mrk 1044's stellar kinematics follow circular rotation, whereas the ionized gas shows tenuous spiral features in the center. We resolve a compact star-forming circumnuclear ellipse (CNE) that has a semi-minor axis of 306 pc. Within this CNE, the gas is metal-rich and its line ratios are entirely consistent with excitation by star formation. With an integrated star formation rate of 0.19 ± 0.05 M<SUB>⊙</SUB> yr<SUP>−1</SUP>, the CNE contributes 27% of the galaxy-wide star formation. <BR /> Conclusions: We conclude that Mrk 1044's nuclear activity has not yet affected the circumnuclear star formation. Thus, Mrk 1044 is consistent with the idea that NLS1s are young AGN. A simple mass budget consideration suggests that the circumnuclear star formation and AGN phase are connected and the patterns in the ionized gas velocity field are a signature of the ongoing AGN feeding.
ADS Bibcode: 
galaxies: Seyfert;quasars: supermassive black holes;galaxies: star formation;galaxies: ISM;galaxies: kinematics and dynamics;techniques: imaging spectroscopy;Astrophysics - Astrophysics of Galaxies