The Close AGN Reference Survey (CARS). Tracing the circumnuclear star formation in the super-Eddington NLS1 Mrk 1044 - INSU - Institut national des sciences de l'Univers Access content directly
Journal Articles Astronomy and Astrophysics - A&A Year : 2022

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

N. Winkel
  • Function : Author
B. Husemann
  • Function : Author
T. A. Davis
  • Function : Author
I. Smirnova-Pinchukova
  • Function : Author
V. N. Bennert
  • Function : Author
M. Gaspari
  • Function : Author
K. Jahnke
  • Function : Author
J. Neumann
  • Function : Author
C. P. O'Dea
  • Function : Author
M. Pérez-Torres
  • Function : Author
M. Singha
  • Function : Author
G. R. Tremblay
  • Function : Author
H. W. Rix
  • Function : Author

Abstract

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.
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.
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.
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 yr−1, the CNE contributes 27% of the galaxy-wide star formation.
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.
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insu-03851624 , version 1 (14-11-2022)

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N. Winkel, B. Husemann, T. A. Davis, I. Smirnova-Pinchukova, V. N. Bennert, et al.. The Close AGN Reference Survey (CARS). Tracing the circumnuclear star formation in the super-Eddington NLS1 Mrk 1044. Astronomy and Astrophysics - A&A, 2022, 663, ⟨10.1051/0004-6361/202243697⟩. ⟨insu-03851624⟩
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