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

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.

Resumen: 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.

Idioma: Inglés

DOI: 10.1051/0004-6361/202243697

Año: 2022

Publicado en: Astronomy and Astrophysics 663 (2022), A104 [16 pp.]
ISSN: 0004-6361

Factor impacto JCR: 6.5 (2022)

Categ. JCR: ASTRONOMY & ASTROPHYSICS rank: 9 / 69 = 0.13 (2022) - Q1 - T1

Factor impacto CITESCORE: 9.8 - Earth and Planetary Sciences (Q1) - Physics and Astronomy (Q1)

Factor impacto SCIMAGO: 1.999 - Space and Planetary Science (Q1) - Astronomy and Astrophysics (Q1)

Tipo y forma: Artículo (Versión definitiva)