Correlation Between Galaxy Mergers and Luminous Active Galactic Nuclei

Hong, Jisoo; Im, Myungshin; Kim, Minjin; Ho, Luis C.

doi:10.1088/0004-637x/804/1/34

Cited by 80 publications

(88 citation statements)

References 122 publications

(138 reference statements)

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“…Finally, Letawe et al (2004), through VLT optical spectroscopy, found that the host of this AGN is part of a group of at least five galaxies, and most probably underwent a collision with its nearest companion (∼4 arcsec). Later, Hong et al (2015) confirmed the merging state thanks to deep optical imaging. As a whole, this source could have undergone a restarted event triggered by the merger, but further observations are needed to confirm this scenario.…”

Section: Images From Surveys and The Literaturementioning

confidence: 77%

Hard X-ray selected giant radio galaxies – II. Morphological evidence of restarted radio activity

Bruni

Panessa

Bassani³

et al. 2020

Monthly Notices of the Royal Astronomical Society

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About 6% of Radio Galaxies (RG) can reach linear sizes larger than 0.7 Mpc, and are then classified as Giant Radio Galaxies (GRG). The conditions that make possible the formation of such big structures is still not clear -either core accretion properties or environmental factors. Recent studies have shown that GRG can be up to four times more abundant in hard X-ray selected (i.e. from INTEGRAL/IBIS and Swift/BAT at >20 keV) RG samples. Moreover, a high fraction of young radio sources found in their cores suggests a recently restarted activity, as suggested from the discrepancy between the measured jet and lobes power, with respect to the one expected from core X-ray luminosity. Here we present a radio morphological study of a sample of 15 hard X-ray selected GRG, discussing low-frequency images from our GMRT campaign complemented with others from the literature: among them, 7/15 show evidence of restarted radio activity either in the form of double-double/X-shaped morphology, or as a cocoon emission embedding more recent jets. This, together with the objects from this sample already found hosting a young radio source in their core, suggests that at least 13 over 15 of these hard X-ray selected GRG show features which are consistent with the possibility of restarted radio activity.

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Section: Images From Surveys and The Literaturementioning

confidence: 77%

Hard X-ray selected giant radio galaxies – II. Morphological evidence of restarted radio activity

Bruni

Panessa

Bassani³

et al. 2020

Monthly Notices of the Royal Astronomical Society

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“…(e.g., Letawe et al 2010;Liu et al 2012;Hong et al 2015), dust-reddened (Urrutia et al 2008;Kocevski et al 2015;Fan et al 2016 Schawinski et al 2011Schawinski et al , 2012Mechtley et al 2016;Villforth et al 2017) redshifts dismiss the importance of major mergers in driving nuclear activity.…”

Section: Are Mergers Important For Triggering Agns?mentioning

confidence: 99%

The Role of Major Mergers and Nuclear Star Formation in Nearby Obscured Quasars

Zhao

et al. 2019

ApJ

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We investigate the triggering mechanism and the structural properties of obscured luminous active galactic nuclei from a detailed study of the rest-frame B and I Hubble Space Telescope images of 29 nearby (z ≈ 0.04 − 0.4) optically selected type 2 quasars. Morphological classification reveals that only a minority (34%) of the hosts are mergers or interacting galaxies. More than half (55%) of the hosts contain regular disks, and a substantial fraction (38%), in fact, are disk-dominated (B/T 0.2) late-type galaxies with low Sérsic indices (n < 2), which is characteristic of pseudo bulges. The prevalence of bars in the spiral host galaxies may be sufficient to supply the modest fuel requirements needed to power the nuclear activity in these systems. Nuclear star formation seems to be ubiquitous in the central regions, leading to positive color gradients within the bulges and enhancements in the central surface brightness of most systems.

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“…AGN are thus often found in morphologically dis-turbed galaxies or ULIRGs (e.g. Urrutia et al 2008;Bennert et al 2008;Yuan et al 2010;Koss et al 2011;Hong et al 2015).…”

Section: The Significance Of Major Merger Quenchingmentioning

confidence: 99%

Galaxy Zoo: Major Galaxy Mergers Are Not a Significant Quenching Pathway*

Weigel

Schawinski

Čaplar

et al. 2017

ApJ

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We use stellar mass functions to study the properties and the significance of quenching through major galaxy mergers. In addition to SDSS DR7 and Galaxy Zoo 1 data, we use samples of visually selected major galaxy mergers and post merger galaxies. We determine the stellar mass functions of the stages that we would expect major merger quenched galaxies to pass through on their way from the blue cloud to the red sequence: 1: major merger, 2: post merger, 3: blue early type, 4: green early type and 5: red early type. Based on the similar mass function shapes we conclude that major mergers are likely to form an evolutionary sequence from star formation to quiescence via quenching. Relative to all blue galaxies, the major merger fraction increases as a function of stellar mass. Major merger quenching is inconsistent with the mass and environment quenching model. At z ∼ 0 major merger quenched galaxies are unlikely to constitute the majority of galaxies that transition the green valley. Furthermore, between z ∼ 0 − 0.5 major merger quenched galaxies account for 1 − 5% of all quenched galaxies at a given stellar mass. Major galaxy mergers are therefore not a significant quenching pathway, neither at z ∼ 0 nor within the last 5 Gyr. The majority of red galaxies must have been quenched through an alternative quenching mechanism which causes a slow blue to red evolution.

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Correlation Between Galaxy Mergers and Luminous Active Galactic Nuclei

Cited by 80 publications

References 122 publications

Hard X-ray selected giant radio galaxies – II. Morphological evidence of restarted radio activity

Hard X-ray selected giant radio galaxies – II. Morphological evidence of restarted radio activity

The Role of Major Mergers and Nuclear Star Formation in Nearby Obscured Quasars

Galaxy Zoo: Major Galaxy Mergers Are Not a Significant Quenching Pathway*

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