CHANDRAX-RAY ANDHUBBLE SPACE TELESCOPEIMAGING OF OPTICALLY SELECTED KILOPARSEC-SCALE BINARY ACTIVE GALACTIC NUCLEI. II. HOST GALAXY MORPHOLOGY AND AGN ACTIVITY

It is well known that active galactic nuclei (AGN) show various forms of interaction with their host galaxy, in a number of phenomena generally called AGN feedback. In particular, the relativistic plasma jets launched by a fraction of AGN can strongly affect their environment. We present here a study of the [O III] λλ4959,5007 lines in a diverse sample of early evolution stage AGN–specifically narrow-line Seyfert 1 galaxies. Radio imaging observations of all of the sources enable a division to jetted and non-jetted sources, and exploiting this we show that the ionized gas properties are significantly influenced by the presence of the jets, as we often find the [O III] lines (blue-)shifted with respect to their restframe wavelength. We also show how the radio morphology and the radio spectral index do not seem to play a role in the origin of the [O III] shifts, thus suggesting that the source inclination is not relevant to the lines displacement. We do not find a strong relation between the [O III] line properties and the bolometric luminosity, suggesting that within our sample radiatively driven outflows do not seem to have a significant contribution to the [O III] line kinematics. We finally suggest that [O III] shifts may be a good proxy to identify the presence of relativistic jets. Additional studies, especially with integral-field spectroscopy, will provide a deeper insight into the relation between jets and their environment in early evolution stage AGN.

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Host galaxy properties of X-ray active galactic nuclei in the local Universe

Astronomy and Astrophysics ◽

10.1051/0004-6361/202142466 ◽

2021 ◽

Author(s):

L. Koutoulidis ◽

G. Mountrichas ◽

I. Georgantopoulos ◽

E. Pouliasis ◽

M. Plionis

Keyword(s):

Active Galactic Nuclei ◽

Galactic Nuclei ◽

Host Galaxy ◽

Local Universe ◽

X Ray

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Chandra COSMOS Legacy Survey: Clustering dependence of Type 2 active galactic nuclei on host galaxy properties

Astronomy and Astrophysics ◽

10.1051/0004-6361/201936191 ◽

2019 ◽

Vol 632 ◽

pp. A88

Author(s):

V. Allevato ◽

A. Viitanen ◽

A. Finoguenov ◽

F. Civano ◽

H. Suh ◽

...

Keyword(s):

Active Galactic Nuclei ◽

Large Scale ◽

Formation Rate ◽

Galactic Nuclei ◽

Stellar Mass ◽

Host Galaxy ◽

X Ray ◽

Normal Galaxies ◽

Massive Halos

Aims. We perform clustering measurements of 800 X-ray selected Chandra COSMOS Legacy (CCL) Type 2 active galactic nuclei (AGN) with known spectroscopic redshift to probe the halo mass dependence on AGN host galaxy properties, such as galaxy stellar mass Mstar, star formation rate (SFR), and specific black hole accretion rate (BHAR; λBHAR) in the redshift range z = [0−3]. Methods. We split the sample of AGN with known spectroscopic redshits according to Mstar, SFR and λBHAR, while matching the distributions in terms of the other parameters, including redshift. We measured the projected two-point correlation function wp(rp) and modeled the clustering signal, for the different subsamples, with the two-halo term to derive the large-scale bias b and corresponding typical mass of the hosting halo. Results. We find no significant dependence of the large-scale bias and typical halo mass on galaxy stellar mass and specific BHAR for CCL Type 2 AGN at mean z ∼ 1, while a negative dependence on SFR is observed, i.e. lower SFR AGN reside in richer environment. Mock catalogs of AGN, matched to have the same X-ray luminosity, stellar mass, λBHAR, and SFR of CCL Type 2 AGN, almost reproduce the observed Mstar − Mh, λBHAR − Mh and SFR–Mh relations, when assuming a fraction of satellite AGN fAGNsat ∼ 0.15. This corresponds to a ratio of the probabilities of satellite to central AGN of being active Q ∼ 2. Mock matched normal galaxies follow a slightly steeper Mstar − Mh relation, in which low mass mock galaxies reside in less massive halos than mock AGN of similar mass. Moreover, matched mock normal galaxies are less biased than mock AGN with similar specific BHAR and SFR, at least for Q > 1.

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Line-driven disc wind in near-Eddington active galactic nuclei: decrease of mass accretion rate due to powerful outflow

Monthly Notices of the Royal Astronomical Society ◽

10.1093/mnras/staa948 ◽

2020 ◽

Vol 494 (3) ◽

pp. 3616-3626 ◽

Cited By ~ 2

Author(s):

Mariko Nomura ◽

Ken Ohsuga ◽

Chris Done

Keyword(s):

Black Holes ◽

Mass Loss ◽

Active Galactic Nuclei ◽

Accretion Rate ◽

Galactic Nuclei ◽

Host Galaxy ◽

Radiation Hydrodynamics ◽

Iterative Technique ◽

X Ray ◽

Mass Accretion Rate

ABSTRACT Based on recent X-ray observations, ultrafast outflows from supermassive black holes are expected to have enough energy to dramatically affect their host galaxy but their launch and acceleration mechanisms are not well understood. We perform two-dimensional radiation hydrodynamics simulations of UV line-driven disc winds in order to calculate the mass-loss rates and kinetic power in these models. We develop a new iterative technique that reduces the mass accretion rate through the inner disc in response to the wind mass-loss. This makes the inner disc less UV bright, reducing the wind power compared to previous simulations which assumed a constant accretion rate with radius. The line-driven winds in our simulations are still extremely powerful, with around half the supplied mass accretion rate being ejected in the wind for black holes with mass 108–$10^{10}\, \mathrm{ M}_\odot$ accreting at L/LEdd = 0.5–0.9. Our results open up the way for estimating the growth rate of supermassive black hole and evaluating the kinetic energy ejected into the interstellar medium (active galactic nuclei feedback) based on a physical model of line-driven disc winds.

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Quasar Evolution and the Growth of Black Holes in the Nuclei of Active Galaxies

Symposium - International Astronomical Union ◽

10.1017/s0074180900140926 ◽

1989 ◽

Vol 134 ◽

pp. 233-239

Author(s):

R. D. Blandford

Keyword(s):

Black Holes ◽

Active Galactic Nuclei ◽

Radiation Pressure ◽

High Redshift ◽

Galactic Nuclei ◽

Rapid Decrease ◽

Active Galaxies ◽

Host Galaxy ◽

Nearby Galaxies ◽

The Mean

The observed evolutionary behavior of active galactic nuclei is compatible with a model in which black holes form in the nuclei of new-born galaxies and then grow at a rate limited by both radiation pressure and the supply of gas. Individual sources become more luminous with time as long as they are being fueled. However, the rapid decrease in the mean rate of supply of gas causes a strong decline in the space density of active objects. Nearby galaxies should harbor modest size (∼ 106 – 108 M⊙) black holes. It is suggested that the gas that fuels high redshift quasars is mostly derived from the host galaxy.

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DUST-CORRECTED COLORS REVEAL BIMODALITY IN THE HOST-GALAXY COLORS OF ACTIVE GALACTIC NUCLEI AT z ∼ 1

The Astrophysical Journal ◽

10.1088/2041-8205/721/1/l38 ◽

2010 ◽

Vol 721 (1) ◽

pp. L38-L42 ◽

Cited By ~ 73

Author(s):

Carolin N. Cardamone ◽

C. Megan Urry ◽

Kevin Schawinski ◽

Ezequiel Treister ◽

Gabriel Brammer ◽

...

Keyword(s):

Active Galactic Nuclei ◽

Galactic Nuclei ◽

Host Galaxy

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ASYMMETRIES OF AGN JETS IN INHOMOGENEOUS MEDIA

International Journal of Modern Physics Conference Series ◽

10.1142/s2010194514601926 ◽

2014 ◽

Vol 28 ◽

pp. 1460192

Author(s):

VOLKER GAIBLER

Keyword(s):

Interstellar Medium ◽

Active Galactic Nuclei ◽

High Redshift ◽

Galactic Nuclei ◽

Inhomogeneous Media ◽

Host Galaxy ◽

Radio Sources ◽

Propagation Models ◽

Hydrodynamical Simulations

Considerable asymmetries in jets from active galactic nuclei (AGN) and associated double radio sources can be caused by an inhomogeneous interstellar medium of the host galaxy. These asymmetries can easily be estimated by 1D propagation models, but hydrodynamical simulations have shown that the actual asymmetries can be considerably larger. With a set of smaller-scale hydrodynamical simulations we examine these asymmetries, and find they are typically a factor of ~ 3 larger than in 1D models. We conclude that, at high redshift, large asymmetries in radio sources are expected in gas-rich galaxies with a clumpy interstellar medium.

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DEEP SILICATE ABSORPTION FEATURES IN COMPTON-THICK ACTIVE GALACTIC NUCLEI PREDOMINANTLY ARISE DUE TO DUST IN THE HOST GALAXY

The Astrophysical Journal ◽

10.1088/0004-637x/755/1/5 ◽

2012 ◽

Vol 755 (1) ◽

pp. 5 ◽

Cited By ~ 104

Author(s):

A. D. Goulding ◽

D. M. Alexander ◽

F. E. Bauer ◽

W. R. Forman ◽

R. C. Hickox ◽

...

Keyword(s):

Active Galactic Nuclei ◽

Galactic Nuclei ◽

Host Galaxy ◽

Absorption Features

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Combining LOFAR and Apertif Data for Understanding the Life Cycle of Radio Galaxies

Galaxies ◽

10.3390/galaxies9040088 ◽

2021 ◽

Vol 9 (4) ◽

pp. 88

Author(s):

Raffaella Morganti ◽

Nika Jurlin ◽

Tom Oosterloo ◽

Marisa Brienza ◽

Emanuela Orrú ◽

...

Keyword(s):

Active Galactic Nuclei ◽

Phased Array ◽

Low Frequency ◽

Galactic Nuclei ◽

Radio Galaxies ◽

Host Galaxy ◽

Evolutionary Stage ◽

Spectral Indices ◽

Feed System ◽

Lockman Hole

Active galactic nuclei (AGN) at the centres of galaxies can cycle between periods of activity and of quiescence. Characterising the duty-cycle of AGN is crucial for understanding their impact on the evolution of the host galaxy. For radio AGN, their evolutionary stage can be identified from a combination of morphological and spectral properties. We summarise the results we have obtained in the last few years by studying radio galaxies in various crucial phases of their lives, such as remnant and restarted sources. We used morphological information derived from LOw Frequency ARray (LOFAR) images at 150 MHz, combined with resolved spectral indices maps, obtained using recently released images at 1400 MHz from the APERture Tile In Focus (Apertif) phased-array feed system installed on the Westerbork Synthesis Radio Telescope. Our study, limited so far to the Lockman Hole region, has identified radio galaxies in the dying and restarted phases. We found large varieties in their properties, relevant for understanding their evolutionary stage. We started by quantifying their occurrences, the duration of the ‘on’ (active) and ‘off’ (dying) phase, and we compared the results with models of the evolution of radio galaxies. In addition to these extreme phases, the resolved spectral index images can also reveal interesting secrets about the evolution of apparently normal radio galaxies. The spectral information can be connected with, and used to improve, the Fanaroff–Riley classification, and we present one example of this, illustrating what the combination of the LOFAR and Apertif surveys now allow us to do routinely.

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Gas flows in a changing-look AGN

Proceedings of the International Astronomical Union ◽

10.1017/s1743921320001672 ◽

2019 ◽

Vol 15 (S359) ◽

pp. 334-338

Author(s):

Sandra I. Raimundo

Keyword(s):

Active Galactic Nuclei ◽

Galactic Nuclei ◽

Emission Lines ◽

Host Galaxy ◽

Gas Flows ◽

Broad Emission ◽

The Galaxy ◽

Low Activity

AbstractThe galaxy Mrk 590 is one of the few known ‘changing-look’ Active Galactic Nuclei (AGN) to have transitioned between states twice, having just increased its flux after a period of ˜10 years of low activity. In addition to the increase in flux, the optical broad emission lines have reappeared but show a different profile than what was observed before they disappeared. The gas motions in the host galaxy of this changing-look AGN show outflows and dynamical structures able to drive gas to the nucleus, suggesting an interplay between inflow and outflow in the centre of the galaxy.

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