Gas rotation, shocks and outflow within the inner 3 kpc of the radio galaxy 3C 33

Couto, Guilherme S.; Storchi‐Bergmann, Thaisa; Schnorr-Müller, Allan

doi:10.1093/mnras/stx962

Cited by 26 publications

(34 citation statements)

References 35 publications

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“…There are also detailed studies of radio galaxies in which the origin of the activity can be clearly attributed to a minor merger, the classical example being of Centarus A, which is estimated to have suffered such a merger a few 10 8 yr ago [63,64]. Other examples include Arp 102B, Pictor A and 3C 33 [65,66,67]. In the case of Pictor A, the inferred low metallicity of the gas further supports this conclusion.…”

Section: Minor Mergersmentioning

confidence: 78%

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Observational constraints on the feeding of supermassive black holes

2019

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Supermassive Black Holes grow at the center of galaxies in consonance with them. In this review we discuss the mass feeding mechanisms that lead to this growth in Active Galactic Nuclei (AGN), focusing on constraints derived from observations of their environment, from extragalactic down to galactic and nuclear scales. At high AGN luminosities, galaxy mergers and interactions play an important role in AGN triggering and feeding. However, gas chaotic cold accretion in galaxy clusters can trigger radiatively inefficient AGNs in brightest cluster galaxies (BCGs). At lower luminosities, minor mergers feed AGN in early-type, gas-starving galaxies, while secular processes dominate in later-type, gas-rich galaxies. While bars do not appear to directly feed AGNs, AGN flickering leads to the dissociation between small and large scales, hence affecting the interpretation of cause and effect. At ∼100 pc scales, recent observations have revealed compact disks and inflows along nuclear gaseous spirals and bars, while chaotic cold accretion continues to feed BCGs at these scales. Estimated mass inflow rates -of 0.01 to a few M yr −1 -are in many cases a thousand times higher than the mass accretion rate to the supermassive black hole. As a result, 10 6 -10 9 M gas reservoirs can be built on 10 7−8 yr, that in turn may lead to the formation of new stars and/or be ejected via the onset of AGN feedback.

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Section: Minor Mergersmentioning

confidence: 78%

“…The AGNIFS group has also been obtaining masses for the ionized gas within the inner 100-500 pc, which are in the range (0.03 -8)×10 6 M [219] for low-luminosity AGN, while in more luminous ones -now within the inner kpc -these masses reach values of 10 8 − 10 9 M [221,67].…”

Section: Gas Masses and Mass Inflow Rates In The Near Universementioning

confidence: 99%

Observational constraints on the feeding of supermassive black holes

2019

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“…The origin of this effect is unclear. The high velocity dispersion could be due to interstellar material shocked by the expanding radio jet (Couto et al 2017) or to higher turbulence due to the presence of strong backflow toward the inner regions produced by the expansion of the radio cavity (e.g. Cielo et al 2017;Antonuccio-Delogu & Silk 2010).…”

Section: Discussionmentioning

confidence: 99%

“…Integral field spectroscopic data provide us with a unique opportunity to study of the impact of AGN feedback in galaxies, mapping the distribution and the kinematics of the ionized gas with respect to the radio jet. Couto et al (2017) observed the radio galaxy 3C 033 with GEMINI-GMOS/IFU (over a field of view of 4 × 6 kpc 2 ) revealing complex motions, with signatures of inflow and outflows. In NGC 3393, a nearby Seyfert 2 galaxy with nuclear radio jets and a nuclear bar, Finlez et al (2018) with the same spectrograph found motions of rotation and outflows, traced by narrow emission line and broad component along the radio lobes and perpendicularly to them.…”

Section: Introductionmentioning

confidence: 99%

The MURALES survey

Balmaverde

Capetti

Marconi

et al. 2019

A&A

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We present observations of a complete sub-sample of 20 radio galaxies from the Third Cambridge Catalog (3C) with redshift < 0.3 obtained from VLT/MUSE optical integral field spectrograph. These data have been obtained as part of the survey MURALES (a MUse RAdio Loud Emission line Snapshot survey) with the main goal of exploring the active galactic nuclei (AGN) feedback process in a sizeable sample of the most powerful radio sources at low redshift. We present the data analysis and, for each source, the resulting emission line images and the 2D gas velocity field. Thanks to their unprecedented depth (the median 3σ surface brightness limit in the emission line maps is 6 × 10−18 erg s−1 cm−2 arcsec−2), these observations reveal emission line structures extending to several tens of kiloparsec in most objects. In nine sources the gas velocity shows ordered rotation, but in the other cases it is highly complex. 3C sources show a connection between radio morphology and emission line properties. Whereas, in three of the four Fanaroff and Riley Class I radio galaxies (FR Is), the line emission regions are compact, ∼1 kpc in size; in all but one of the Class II radiogalaxies FR IIs, we detected large scale structures of ionized gas with a median extent of 17 kpc. Among the FR IIs, those of high and low excitation show extended gas structures with similar morphological properties, suggesting that they both inhabit regions characterized by a rich gaseous environment on kpc scale.

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“…In order to explain the observed scaling relationships between the massaccreting supermassive black holes (SMBHs) and galaxy bulge properties (McConnell & Ma 2013;Kormendy & Ho 2013), AGN feedback is usually summoned (Fabian 2012). Although AGN feedback processes have been identified in recent works (Couto et al 2017;Revalski et al 2018), their impact must be quantified in order to determine whether or not they deliver effective power, capable of altering star formation rates and evacuating gas reservoirs (Harrison 2017;Zubovas & Bourne 2017).…”

Section: Introductionmentioning

confidence: 99%

Ionized gas outflows in the interacting radio galaxy 4C +29.30

Couto¹,

Storchi‐Bergmann

Siemiginowska

et al. 2019

Proc. IAU

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We investigate the ionized gas excitation and kinematics in the inner 4.3 × 6.2 kpc2 of the merger radio galaxy 4C +29.30. Using optical integral field spectroscopy with the Gemini North Telescope, we find signatures of gas outflows, including high blueshifts of up to ∼−650 km s−1 observed in a region ∼1″ south of the nucleus, which also presents high velocity dispersion (∼250 km s−1). A possible redshifted counterpart is observed north from the nucleus. We propose that these regions correspond to a bipolar outflow possibly due to the interaction of the radio jet with the ambient gas. We estimate a total ionized gas mass outflow rate of $\[{\dot M_{out}} = 18.1\begin{array}{c} + 8.2\\ - 5.3\end{array}{\kern 1pt} {\kern 1pt} \]$ with a kinetic power of $\[\dot E = 5.8\begin{array}{c} + 7.6\\ - 2.9\end{array} \times {10^{42}}{\kern 1pt} {\kern 1pt} \]$ , which represents $\[3.9\begin{array}{c} + 5.1\\ - 1.5\end{array}\% \]$ of the AGN bolometric luminosity. These values are higher than usually observed in nearby active galaxies and could imply a significant impact of the outflows on the evolution of the host galaxy.

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Gas rotation, shocks and outflow within the inner 3 kpc of the radio galaxy 3C 33

Cited by 26 publications

References 35 publications

Observational constraints on the feeding of supermassive black holes

Observational constraints on the feeding of supermassive black holes

The MURALES survey

Ionized gas outflows in the interacting radio galaxy 4C +29.30

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