Role of Environment on Nuclear Activity

Amiri, A.; Tavasoli, Saeed; Zotti, G. de

doi:10.3847/1538-4357/ab08e7

Cited by 19 publications

(22 citation statements)

References 37 publications

(57 reference statements)

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“…This is a rather novel definition of AGN fraction compared with the previous AGN fraction defined as the number of AGNs relative to all galaxies including passive and star forming ones. Coincidentally, we notice that in a most recent work, Amiri & Tavasoli (2019) constructed two separate samples, AGN and starforming galaxies (SFG), and found the AGN fraction (with respect to SFG) weakly depends on the distance from the brightest cluster member. This is consistent with our results and also supports our definition of AGN fraction.…”

Section: Discussionmentioning

confidence: 64%

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The dependence of AGN activity on environment in SDSS

Man

Peng

Kong

et al. 2019

Monthly Notices of the Royal Astronomical Society

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Environment is one of the key external drivers of the galaxies, while active galactic nucleus (AGN) is one of the key internal drivers. Both of them play fundamental roles in regulating the formation and evolution of galaxies. We explore the interrelationship between environment and AGN in SDSS. At a given stellar mass, the specific star formation rate distribution of the AGN host galaxies remains unchanged with overdensity, with the peak of the distribution around the Green Valley. We show that, at a given stellar mass, the AGN fraction that has been commonly used in previous studies (defined as the number of AGNs relative to all galaxies including passive and star forming ones) does decrease with increasing over-density for satellites. This is largely due to the fact that the fraction of passive galaxies strongly depends on environment. In order to investigate the intrinsic correlation between AGN and environment, especially under the assumption that AGN feedback is responsible for star formation quenching, the AGN fraction should be defined as the number of AGNs relative to the star-forming galaxies only. With the new definition, we find little dependence of AGN fraction on over-density, central/satellite, and group halo mass. There is only marginal evidence that AGN may prefer denser regions, which is possibly due to more frequent interaction of galaxies or higher merger rate in groups. Our results support the scenario that internal secular evolution is the predominant mechanism of triggering AGN activity, while external environment related processes only play a minor role.

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Section: Discussionmentioning

confidence: 64%

“…Wang & Li (2018) found the clustering of narrow-line AGN with blue color or massive red galaxies is almost identical with controlled galaxies. In a most recent work, Amiri & Tavasoli (2019) concluded that nuclear activity is weakly affected by local galaxy density using a sample including AGN and star-forming galaxies.…”

Section: Introductionmentioning

confidence: 99%

The dependence of AGN activity on environment in SDSS

Man

Peng

Kong

et al. 2019

Monthly Notices of the Royal Astronomical Society

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“…The optical AGN activity of noninteracting galaxies has also been investigated by different authors. Amiri et al 2019 show no enhancement in the fraction of galaxies hosting optical AGN in voids compared to galaxy groups. Argudo-Fernandez et al 2016 show similar results using samples of isolated and isolated pair galaxies.…”

Section: Agnmentioning

confidence: 73%

“…A higher fraction of optical AGN for galaxies in voids is also reported in Constantin et al (2007). In contrast, Amiri et al 2019 reported no enhancement in the fraction of galaxies hosting optical AGN in voids compared to galaxy groups.…”

Section: Agn Activity and Galaxy Environmentmentioning

confidence: 87%

The Effect of Environment on AGN Activity: The Properties of Radio and Optical AGN in Void, Isolated, and Group Galaxies

Miraghaei

2020

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The evolution of galaxies depends on their environments. In this work, active galactic nucleus (AGN) activity in different environments has been studied. The fractions of radio and optical AGN in four different environments have been compared using samples of void, isolated, group member, and the brightest group galaxies (BGGs). Galaxies in voids show significantly lower stellar ages, concentrations, colours and surface mass densities, and they experience more oneon-one interactions compared to the isolated galaxies and galaxies in groups. In order to study pure environmental effects, the biases caused by the stellar mass and galaxy type quantified by 4000Å break strength have been removed. While the results confirm no dependence of the optical AGN activity on environment in blue galaxies and with lower significance in green galaxies, a higher fraction of optical AGN has been observed for the massive red galaxies in voids compared to the galaxies in dense environments. This may be related to the higher amount of one-on-one interaction observed in the void galaxies, or it may reflect more fundamental differences in the host galaxies or environments of the voids. The radio-mode AGN activity increases in dense environment for red galaxies. No changes in the radio-loud AGN fraction have been observed for the blue and green galaxies. This shows that the effect of environment on AGN activity is not significant in the presence of cold gas in galaxies. We also discuss whether the efficiency of gas accretion depends on the properties of the host galaxy.

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“…To analyse these issues, we look into the possible connections between the galactic environment and the co-evolution of its SMBH and stellar components. Amiri et al (2019) selected a volume limited sample of AGN host galaxies in both void and cluster environments, limited to objects brighter than M r = −18 and covering a redshift range 0.01−0.04, which have been divided into low stellar mass (LSM, 9.0 log(M /M ) < 10.2) and high stellar mass (HSM, 10.2 log(M /M ) < 11.0) subsamples. Samples include 60 and 40 galaxies in LSM and HSM samples, respectively.…”

Section: Introductionmentioning

confidence: 99%

Effects of AGN feedback on galaxy downsizing in different environments

et al. 2019

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We have investigated the role of AGN feedback on galaxy downsizing in cluster and void environments, using the sample from Amieri et al. (2019). Our results indicate that, at least in the local universe, the correlation between black hole mass and (specific) star formation rate is statistically indistinguishable in the two environments. Therefore, the role of the environment in modulating AGN feedback effects on the host galaxy star formation is negligible.

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Role of Environment on Nuclear Activity

Cited by 19 publications

References 37 publications

The dependence of AGN activity on environment in SDSS

The dependence of AGN activity on environment in SDSS

The Effect of Environment on AGN Activity: The Properties of Radio and Optical AGN in Void, Isolated, and Group Galaxies

Effects of AGN feedback on galaxy downsizing in different environments

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