scholarly journals Zooming into local active galactic nuclei: The power of combining SDSS-IV MaNGA with higher resolution integral field unit observations

2017 ◽  
pp. stx246 ◽  
Author(s):  
Dominika Wylezalek ◽  
Allan Schnorr Müller ◽  
Nadia L. Zakamska ◽  
Thaisa Storchi-Bergmann ◽  
Jenny E. Greene ◽  
...  
Keyword(s):  
Active Galactic Nuclei ◽  
Galactic Nuclei ◽  
Field Unit ◽  
Integral Field

Multiwavelength analysis of OH Megamaser galaxies: The case of IRAS11506-3851

2020 ◽  
Vol 15 (S359) ◽  
pp. 347-349
Author(s):  
Carpes P. Hekatelyne ◽  
Thaisa Storchi-Bergmann
Keyword(s):  
Active Galactic Nuclei ◽  
Hubble Space Telescope ◽  
Galactic Nuclei ◽  
Large Array ◽  
Very Large Array ◽  
Star Forming ◽  
Star Forming Regions ◽  
Field Unit ◽  
Mixed Transition ◽  
Integral Field

AbstractWe present Multi-Object Spectrograph (GMOS) Integral Field Unit (IFU), Hubble Space Telescope (HST) and Very Large Array (VLA) observations of the inner kpc of the OH Megamaser galaxy IRAS 11506-3851. In this work we discuss the kinematics and excitation of the gas as well as its radio emission. The HST images reveal an isolated spiral galaxy and the combination with the GMOS-IFU flux distributions allowed us to identify a partial ring of star-forming regions surrounding the nucleus with a radius of ≍500 pc. The emission-line ratios and excitation map reveal that the region inside the ring present mixed/transition excitation between those of Starbursts and Active Galactic Nuclei (AGN), while regions along the ring are excited by Starbursts. We suggest that we are probing a buried or fading AGN that could be both exciting the gas and originating an outflow.

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

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.

scholarly journals SDSS-IV MaNGA: identification of active galactic nuclei in optical integral field unit surveys

2017 ◽  
Vol 474 (2) ◽  
pp. 1499-1514 ◽  
Author(s):  
Dominika Wylezalek ◽  
Nadia L. Zakamska ◽  
Jenny E. Greene ◽  
Rogemar A. Riffel ◽  
Niv Drory ◽  
...  
Keyword(s):  
Active Galactic Nuclei ◽  
Galactic Nuclei ◽  
Field Unit ◽  
Integral Field

scholarly journals Outflows in nearby AGNs

2009 ◽  
Vol 5 (H15) ◽  
pp. 245-246
Author(s):  
Thaisa Storchi-Bergmann
Keyword(s):  
Active Galactic Nuclei ◽  
Galactic Nuclei ◽  
Gas Kinematics ◽  
Integral Field Spectroscopy ◽  
Line Region ◽  
Mass Outflow ◽  
Kinematic Studies ◽  
Narrow Line Region ◽  
Integral Field ◽  
Velocity Channel

AbstractI report results of kinematic studies of the Narrow-Line Region (NLR) of nearby Active Galactic Nuclei (AGN) from integral field spectroscopy (IFS) obtained with the Gemini Telescopes, including mass outflow rates and corresponding kinetic power. The IFS has allowed the construction of velocity channel maps which provide a better coverage of the gas kinematics and do not support the presence of acceleration up to hundred parsec scales in the NLR as found in previous studies based solely on centroid velocity maps.

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

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.

scholarly journals Ionized gas outflow signatures in SDSS-IV MaNGA active galactic nuclei

2020 ◽  
Vol 492 (4) ◽  
pp. 4680-4696 ◽  
Author(s):  
Dominika Wylezalek ◽  
Anthony M Flores ◽  
Nadia L Zakamska ◽  
Jenny E Greene ◽  
Rogemar A Riffel
Keyword(s):  
Emission Line ◽  
Active Galactic Nuclei ◽  
Galactic Nuclei ◽  
Sloan Digital Sky Survey ◽  
Host Galaxies ◽  
Ionized Gas ◽  
Kinetic Coupling ◽  
Nearby Galaxies ◽  
Cool Gas ◽  
Field Unit

ABSTRACT The prevalence of outflow and feedback signatures in active galactic nuclei (AGNs is a major unresolved question which large integral field unit (IFU) surveys now allow to address. In this paper, we present a kinematic analysis of the ionized gas in 2778 galaxies at z ∼ 0.05 observed by Sloan Digital Sky Survey-IV (SDSS-IV) Mapping Nearby Galaxies at Apache Point Observatory (MaNGA). Specifically, we measure the kinematics of the [O iii] λ5007 Å emission line in each spatial element and fit multiple Gaussian components to account for possible non-gravitational motions of gas. Comparing the kinematics of the ionized gas between 308 MaNGA-selected AGNs that have been previously identified through emission-line diagnostics and sources not classified as AGN, we find that while 25 per cent of MaNGA-selected AGN show [O iii] components with emission-line widths of >500 km s−1 in more than 10 per cent of their spaxels, only 7 per cent of MaNGA non-AGNs show a similar signature. Even the AGNs that do not show nuclear AGN photoionization signatures and that were only identified as AGN based on their larger scale photoionization signatures show similar kinematic characteristics. In addition to obscuration, another possibility is that outflow and mechanical feedback signatures are longer lived than the AGN itself. Our measurements demonstrate that high velocity gas is more prevalent in AGN compared to non-AGN and that outflow and feedback signatures in low-luminosity, low-redshift AGN may so far have been underestimated. We show that higher luminosity MaNGA-selected AGNs are able to drive larger scale outflows than lower luminosity AGN. But estimates of the kinetic coupling efficiencies are ≪1 per cent and suggest that the feedback signatures probed in this paper are unlikely to have a significant impact on the AGN host galaxies. However, continuous energy injection may still heat a fraction of the cool gas and delay or suppress star formation in individual galaxies even when the AGN is weak.

scholarly journals Gas Motion Mapping for Three Seyfert Galaxies

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.

scholarly journals Spatially Resolved Spectroscopy to Confirm or Disprove Dual Active Galactic Nuclei

2013 ◽  
Vol 9 (S304) ◽  
pp. 371-374
Author(s):  
Rosalie C. McGurk ◽  
Claire E. Max ◽  
Anne Medling ◽  
Gregory A. Shields
Keyword(s):  
Emission Line ◽  
Active Galactic Nuclei ◽  
Adaptive Optics ◽  
Near Infrared ◽  
Galactic Nuclei ◽  
Spatially Resolved ◽  
Spatially Resolved Spectroscopy ◽  
Integral Field Spectrograph ◽  
Guide Star ◽  
Integral Field

AbstractWhen galaxies merge, gas accretes onto both central supermassive black holes. Thus, one expects to see dual active galactic nuclei (AGNs) in a fraction of galaxy mergers. Candidates for galaxies containing dual AGNs have been identified by the presence of double-peaked narrow [O III] emission lines and by high spatial resolution images of close galaxy pairs. 30% of double-peaked narrow [OIII] emission line SDSS AGNs have two spatial components within a 3″ radius. However, spatially resolved spectroscopy is needed to confirm these galaxy pairs as systems with double AGNs. With the Keck 2 Laser Guide Star Adaptive Optics system and the OSIRIS near-infrared integral field spectrograph, we obtained spatially resolved spectra for SDSS J095207.62+255257.2, confirming that it contains a Type 1 and a Type 2 AGN separated by 4.8 kpc (=1.0″). We performed similar integral field and long-slit spectroscopy observations of more spatially separated candidate dual AGNs and will report on the varied results. By assessing what fraction of radio-quiet double-peaked emission line SDSS AGNs are true dual AGNs, we can better constrain the statistics of dual AGNs and characterize physical conditions throughout these interacting AGNs.

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