The Close AGN Reference Survey (CARS)

Singha, M.; Scharwächter, J.; McElroy, R.; Neumann, Justus; Smirnova-Pinchukova, I.; Urrutia, T.; Baum, S. A.; Bennert, Vardha N.; Combes, F.; Croom, S. M.; Davis, T. A.; Fournier, Y.; Galkin, A.; Gaspari, M.; Enke, H.; Krumpe, M.; O’Dea, C. P.; Rose, Tom; Tremblay, G. R.; Walcher, C. J.

doi:10.1051/0004-6361/202141312

Cited by 20 publications

(38 citation statements)

References 301 publications

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“…As part of the Close AGN Reference Survey (CARS, Husemann et al 2022) 2 Mrk 1044 has been observed with the Wide Field Mode (WFM) of the MUSE instrument. The data were reduced using the standard ESO pipeline v.2.8.1 (Weilbacher et al 2012(Weilbacher et al , 2020 as described in Husemann et al (2022). The resulting data cube has a FOV of 62 .…”

Section: Vlt Muse Wfmmentioning

confidence: 99%

“…Therefore, the subtraction from the original datacube causes an over-subtraction in the center. We follow the AGN-host deblending approach described in Husemann et al (2022) where the AGN spectrum is iteratively corrected for the host galaxy contribution. Thereby we assume a constant host galaxy surface brightness within the innermost 0 .…”

Section: Iterative Agn-host Deblending From the Ifu Datamentioning

confidence: 99%

“…For the extraction of the galaxy properties we employ PyParadise (Husemann et al 2016(Husemann et al , 2022 which is a publicly available 5 updated version of the stellar population synthesis fitting code Paradise (Walcher et al 2015). It is extended by an Markov chain Monte Carlo (MCMC) algorithm to find the parameters of the line-of-sight velocity distribution (LOSVD) and a routine to fit the emission lines.…”

Section: Fitting the Stellar Continuum And The Ionized Gas Emissionmentioning

confidence: 99%

“…Its central engine is powered by a black hole with a reverberation mapped mass of M • = 2.8 × 10 6 M (Du et al 2015). Numerous studies have confirmed Mrk 1044's high accretion rate with Eddington fractions λ Edd = L bol /L Edd that range from 1.2 (Husemann et al 2022) up to 16 (Du et al 2015). Although Mrk 1044 is a bright X-ray source (Dewangan et al 2007), it shows no signs of AGN-driven hot outflows in the form of extended X-ray emission (Powell et al 2018).…”

Section: Introductionmentioning

confidence: 98%

“…Mrk 1044 is a textbook example of a NLS1 and one of the nearest super-Eddington accreting AGN. It is a radio-quiet, luminous (L bol = 3.4 × 10 44 erg s −1 ) NLS1 at z = 0.0162 (Husemann et al 2022). Its central engine is powered by a black hole with a reverberation mapped mass of M • = 2.8 × 10 6 M (Du et al 2015).…”

Section: Introductionmentioning

confidence: 99%

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

Winkel,

Husemann,

Davis

et al. 2022

Preprint

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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 VLT MUSE NFM-AO 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 extract the faint stellar continuum emission from the AGN-deblended host and perform spatially resolved emission line diagnostics with an unprecedented resolution. Combining both MUSE WFM and NFM-AO observations, we use a kinematic model of a thin rotating disk to trace the stellar and ionized gas motion from 10 kpc 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 SFR 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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Section: Vlt Muse Wfmmentioning

confidence: 99%

Section: Iterative Agn-host Deblending From the Ifu Datamentioning

confidence: 99%

Section: Fitting the Stellar Continuum And The Ionized Gas Emissionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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

Winkel,

Husemann,

Davis

et al. 2022

Preprint

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The Close AGN Reference Survey (CARS)

Singha

Urrutia

O’Dea

et al. 2022

A&A

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Context. The strong asymmetry in the optical [O III] λ5007 emission line is one of the best signatures of active galactic nuclei (AGN) driven warm (∼104 K) ionized gas outflows on host galaxy scales. While large spectroscopic surveys such as the sloan digital sky survey (SDSS) have characterized the kinematics of [O III] for large samples of AGN, estimating the associated energetics requires spatially resolving these outflows with, for example, integral field unit (IFU) studies. Aims. As part of the Close AGN Reference Survey, we obtained spatially resolved IFU spectroscopy for a representative sample of 39 luminous type 1 AGN at 0.01 < z < 0.06 with the multi unit spectroscopic explorer and the visible multi object spectrograph IFUs at the very large telescope to infer the spatial location of the ionized gas outflows. Methods. We compared the 2D light distributions of the [O III] wing to that of the Hβ broad emission line region, a classical point source (PSF). We then used the PSF to distinguish between the unresolved and resolved [O III] wing emission. We further determined its location using spectro-astrometry for the point-like sources. Results. The [O III] wing is spatially unresolved in 23 out of the 36 AGN with > 80% of the flux associated with a point-like source. We measured < 100 pc offsets in the spatial location of the outflow from the AGN nucleus using the spectro-astrometry technique for these sources. For the other 13 AGN, the [O III] wing emission is resolved and possibly extended on several kiloparsec scales. Conclusions. We conclude that [O III] wing emission can be compact or extended in an unbiased luminous AGN sample, where both cases are likely to appear. Electron density in the compact [O III] wing regions (median ne ∼ 1900 cm−3) is nearly a magnitude higher than in the extended ones (median ne ∼ 500 cm−3). The presence of spatially extended and compact [O III] wing emission is unrelated to the AGN bolometric luminosity and to inclination effects, which means other features such as time delays, or mechanical feedback (radio jets) may shape the ionized gas outflow properties.

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The Close AGN Reference Survey (CARS)

Smirnova-Pinchukova

Davis

Smith

et al. 2022

A&A

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Context. Active galactic nuclei (AGN) are thought to be responsible for the suppression of star formation in massive ∼1010 M⊙ galaxies. While this process is a key feature in numerical simulations of galaxy formation, it has not been unambiguously confirmed in observational studies yet. Aims. The characterization of the star formation rate (SFR) in AGN host galaxies is challenging as AGN light contaminates most SFR tracers. Furthermore, the various SFR tracers are sensitive to different timescales of star formation from approximately a few to 100 Myr. We aim to obtain and compare SFR estimates from different tracers for AGN host galaxies in the Close AGN Reference Survey (CARS) to provide new observational insights into the recent SFR history of those systems. Methods. We constructed integrated panchromatic spectral energy distributions to measure the far infrared (FIR) luminosity as a tracer for the recent (< 100 Myr) SFR. In addition we used the integral-field unit observation of the CARS targets to employ the Hα luminosity decontaminated by AGN excitation as a proxy for the current (< 5 Myr) SFR. Results. We find that significant differences in specific SFR of the AGN host galaxies as compared with the larger galaxy population disappear once cold gas mass, in addition to stellar mass, is used to predict the SFR for a specific AGN host. Only a tentative trend with the inclination of the host galaxy remains, such that SFR appears slightly lower than expected when the galaxies of unobscured AGN appear more edge-on along our line-of-sight, particular for dust-insensitive FIR-based SFRs. We identify individual galaxies with a significant difference in their SFR which can be related to a recent enhancement or decline in their SFR history that might be related to various processes including interactions, gas consumption, outflows, and AGN feedback. Conclusions. AGN can be present in various stages of galaxy evolution which makes it difficult to relate the SFR solely to the impact of the AGN. Our study shows that stellar mass alone is an insufficient parameter to estimate the expected SFR of an AGN host galaxy compared to the underlying non-AGN galaxy population. We do not find any strong evidence for a global positive or negative AGN feedback in the CARS sample. However, there is tentative evidence that (1) the relative orientation of the AGN engine with respect to the host galaxies might alter the efficiency of AGN feedback and that (2) the recent SFH is an additional tool to identify rapid changes in galaxy growth driven by the AGN or other processes.

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The Close AGN Reference Survey (CARS)

Cited by 20 publications

References 301 publications

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

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

The Close AGN Reference Survey (CARS)

The Close AGN Reference Survey (CARS)

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