The MAGNUM survey: a high-resolution study of the complex nuclear environment of local Seyfert galaxies

The central regions of Seyfert galaxies, comprising broad and narrow line regions and the inner parts of galaxy disk and bulge, is characterized by a complex interplay among many physical effects. Specifically, it is shaped by the influence of the central black hole, producing ionization by an hard continuum and gas outflows. The integral-field spectrograph MUSE at the ESO VLT allows to carry out a detailed study of these regions to obtain their ionization, dynamical, and metallicity properties. Here we present some highlights of the MAGNUM survey which is designed to study the central regions of a sample of nearby (D > 500 pc) Seyfert galaxies. We describe the rationale of the survey, the data analysis techniques used to extract information on ionization and dynamics, and the results for one galaxy, Centaurus A.

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Interstellar medium properties and feedback in local AGN with the MAGNUM survey

Proceedings of the International Astronomical Union ◽

10.1017/s1743921320002422 ◽

2019 ◽

Vol 15 (S359) ◽

pp. 323-328

Author(s):

M. Mingozzi ◽

G. Cresci ◽

G. Venturi ◽

A. Marconi ◽

F. Mannucci

Keyword(s):

Interstellar Medium ◽

Seyfert Galaxies ◽

Large Telescope ◽

Novel Approach ◽

Very Large Telescope ◽

Central Regions ◽

Tentative Evidence ◽

Integral Field Spectrograph ◽

Integral Field ◽

Centaurus A

AbstractWe investigated the interstellar medium (ISM) properties in the central regions of nearby Seyfert galaxies characterised by prominent conical or bi-conical outflows belonging to the MAGNUM survey by exploiting the unprecedented sensitivity, spatial and spectral coverage of the integral field spectrograph MUSE at the Very Large Telescope. We developed a novel approach based on the gas and stars kinematics to disentangle high-velocity gas in the outflow from gas in the disc to spatially track the differences in their ISM properties. This allowed us to reveal the presence of an ionisation structure within the extended outflows that can be interpreted with different photoionisation and shock conditions, and to trace tentative evidence of outflow-induced star formation (“positive” feedback) in a galaxy of the sample, Centaurus A.

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Turbulence/outflows perpendicular to low-power jets in Seyfert galaxies

Proceedings of the International Astronomical Union ◽

10.1017/s1743921320002197 ◽

2019 ◽

Vol 15 (S359) ◽

pp. 464-466

Author(s):

Giacomo Venturi ◽

Alessandro Marconi ◽

Matilde Mingozzi ◽

Giovanni Cresci ◽

Stefano Carniani ◽

...

Keyword(s):

Low Power ◽

Active Galactic Nuclei ◽

Interaction Mechanism ◽

Galactic Nuclei ◽

Seyfert Galaxies ◽

Near Ir ◽

The Galaxy ◽

Line Widths ◽

Integral Field Spectrograph ◽

Integral Field

AbstractWe present recent results from our MAGNUM survey of nearby active galactic nuclei (AGN), which exploits observations from the optical/near-IR integral field spectrograph MUSE at VLT. We detect strongly enhanced line widths in emission line maps of four galaxies perpendicularly to their low-power jets and AGN ionisation cones, indicative of turbulent/outflowing material. The observation of a similar phenomenon in other works suggests that it originates from an interaction mechanism between the jet and the galaxy disc through which it propagates.

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High Spatial Resolution 2D Spectrography of ENLR in Seyfert Galaxies

Symposium - International Astronomical Union ◽

10.1017/s0074180900176260 ◽

1994 ◽

Vol 159 ◽

pp. 445-445

Author(s):

E. Pecontal ◽

P. Ferruit

Keyword(s):

Spatial Resolution ◽

High Spatial Resolution ◽

Seyfert Galaxies ◽

Spectral Domain ◽

Radio Sources ◽

Spatial Dimensions ◽

Integral Field Spectrograph ◽

Integral Field

Three active nuclei environments have been observed with the integral field spectrograph TIGER operating in the visible domain : Mkn 34, NGC 5929 and M 51. These three objects exhibit linear radio-sources evocating expulsion of plasmons from the nucleus. Long-slit or Pérot-Fabry observations showed that the gas of the galaxies is interacting with the radio-emitter, and models of this interaction have been proposed. These new observations combines the two spatial dimensions of integral field spectrography (with 0.7″ FWHM) with the rather large spectral domain of classical spectrography.

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Gas Motion Mapping for Three Seyfert Galaxies

Open Astronomy ◽

10.1515/astro-2017-0325 ◽

2011 ◽

Vol 20 (3) ◽

Author(s):

A. Smirnova ◽

A. Moiseev ◽

I. Katkov ◽

V. Afanasiev

Keyword(s):

Active Galactic Nuclei ◽

Galactic Nuclei ◽

Seyfert Galaxies ◽

Velocity Fields ◽

Emission Lines ◽

Ionized Gas ◽

Preliminary Results ◽

Fabry Perot ◽

Integral Field Spectrograph ◽

Integral Field

AbstractWe report the preliminary results of a kinematical study of three Seyfert galaxies selected from a sample of nearby active galactic nuclei observed using 3D spectroscopy. The observations were performed at the prime focus of the 6 m telescope of SAO RAS with the integral-field spectrograph MPFS and with a scanning Fabry-Pérot interferometer, installed on the multimode device SCORPIO. Based on these data, the monochromatic maps and velocity fields in different emission lines were constructed. We have detected the nuclear outflow or ionized gas motions associated with a radio jet in all the circumnuclear regions of these galaxies.

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The first VisAO-fed integral field spectrograph: VisAO IFS

10.1117/12.857516 ◽

2010 ◽

Cited By ~ 2

Author(s):

Katherine B. Follette ◽

Laird M. Close ◽

Derek Kopon ◽

Jared R. Males ◽

Victor Gasho ◽

...

Keyword(s):

Integral Field Spectrograph ◽

Integral Field

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HARMONI: A Narrow Field Near-infrared Integral Field Spectrograph for the E-ELT

Astrophysics and Space Science Proceedings - Science with the VLT in the ELT Era ◽

10.1007/978-1-4020-9190-2_45 ◽

2009 ◽

pp. 267-271 ◽

Cited By ~ 3

Author(s):

Matthias Tecza ◽

Niranjan Thatte ◽

Fraser Clarke ◽

David Freeman

Keyword(s):

Near Infrared ◽

Integral Field Spectrograph ◽

Integral Field

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The MURALES survey

Astronomy and Astrophysics ◽

10.1051/0004-6361/202039062 ◽

2020 ◽

Vol 645 ◽

pp. A12

Author(s):

B. Balmaverde ◽

A. Capetti ◽

A. Marconi ◽

G. Venturi ◽

M. Chiaberge ◽

...

Keyword(s):

Emission Line ◽

Large Scale ◽

Line Emission ◽

Emission Region ◽

Gas Velocity ◽

Ionized Gas ◽

Large Scale Structures ◽

Scale Structures ◽

Integral Field Spectrograph ◽

Integral Field

We present the final observations of a complete sample of 37 radio galaxies from the Third Cambridge Catalogue (3C) with redshift < 0.3 and declination < 20° obtained with the VLT/MUSE optical integral field spectrograph. These data were obtained as part of the MUse RAdio Loud Emission line Snapshot (MURALES) survey with the main goal of exploring the AGN feedback process in the most powerful radio sources. We present the data analysis and, for each source, the resulting emission line images and the 2D gas velocity field. Thanks to the unprecedented depth these observations reveal emission line regions (ELRs) extending several tens of kiloparsec in most objects. The gas velocity shows ordered rotation in 25 galaxies, but in several sources it is highly complex. We find that the 3C sources show a connection between radio morphology and emission line properties. In the ten FR I sources the line emission region is generally compact, only a few kpc in size; only in one case does it exceed the size of the host. Conversely, all but two of the FR II galaxies show large-scale structures of ionized gas. The median extent is 16 kpc with the maximum reaching a size of ∼80 kpc. There are no apparent differences in extent or strength between the ELR properties of the FR II sources of high and low gas excitation. We confirm that the previous optical identification of 3C 258 is incorrect: this radio source is likely associated with a quasi-stellar object at z ∼ 1.54.

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Chemical abundances in Seyfert galaxies – V. The discovery of shocked emission outside the AGN ionization axis

Monthly Notices of the Royal Astronomical Society Letters ◽

10.1093/mnrasl/slaa194 ◽

2020 ◽

Vol 501 (1) ◽

pp. L54-L59

Author(s):

R A Riffel ◽

O L Dors ◽

M Armah ◽

T Storchi-Bergmann ◽

A Feltre ◽

...

Keyword(s):

Electron Temperature ◽

Active Galactic Nuclei ◽

Direct Evidence ◽

Galactic Nuclei ◽

Seyfert Galaxies ◽

Chemical Abundances ◽

Temperature Distributions ◽

Field Unit ◽

Dusty Torus ◽

Integral Field

ABSTRACT We present maps for the electron temperature in the inner kpc of three luminous Seyfert galaxies: Mrk 79, Mrk 348, and Mrk 607 obtained from Gemini Multi-Object Spectrograph-integral field unit observations at spatial resolutions of ∼110–280 pc. We study the distributions of electron temperature in active galaxies and find temperatures varying in the range from ∼8000 to $\gtrsim 30\, 000\,$K. Shocks due to gas outflows play an important role in the observed temperature distributions of Mrk 79 and Mrk 348, while standard photoionization models reproduce the derived temperature values for Mrk 607. In Mrk 79 and Mrk 348, we find direct evidence for shock ionization with overall orientation orthogonal to the ionization axis, where shocks can be easily observed as the active galactic nuclei radiation field is shielded by the nuclear dusty torus. This also indicates that even when the ionization cones are narrow, the shocks can be much wider angle.

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