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We have analyzed the frequency and properties of the nuclear activity in a sample of galaxies with circumnuclear rings and spirals (CNRs). This sample was compared with a control sample of galaxies with very similar global properties but…

Astrophysics of Galaxies · Physics 2016-05-17 M. P. Aguero , R. J. Diaz , H. Dottori

Kpc-scale dual and offset Active Galactic Nuclei (AGNs) are signposts of accreting supermassive black holes (SMBHs) triggered during late-stage galaxy mergers, offering crucial insights into the coevolution of SMBHs and galaxies. However,…

Astrophysics of Galaxies · Physics 2024-05-27 Junyao Li , Ming-Yang Zhuang , Yue Shen , Marta Volonteri , Nianyi Chen , Tiziana Di Matteo

We present Gemini Multi-Object Spectrograph (GMOS) spectroscopic observations of 95 galaxies from the Arp & Madore (1987) catalogue of peculiar galaxies. These galaxies have been selected because they appear to be in pairs and small groups.…

Investigating whether and how galaxy mergers affect black hole growth can be determinant for black hole-galaxy evolution models and, in particular, for understanding how early Universe seed black holes grew to become supermassive. However,…

Astrophysics of Galaxies · Physics 2025-07-23 A. Eróstegui , M. Mezcua , M. Siudek , H. Domínguez Sánchez , V. Rodríguez Morales

In these proceedings I briefly: (1) review the impact (or "feedback") that active galactic nuclei (AGN) are predicted to have on their host galaxies and larger scale environment, (2) review the observational evidence for or against these…

Astrophysics of Galaxies · Physics 2015-06-18 C. M. Harrison

We explore the effect of AGN activity on the star formation history of galaxies by analysing the stellar population properties of ten pairs of nearby twin galaxies -- selected as being visually similar except for the presence of an AGN. The…

Astrophysics of Galaxies · Physics 2022-06-17 J. Angthopo , I. del Moral-Castro , I. Ferreras , B. García-Lorenzo , C. Ramos Almeida

The process of Active Galactic Nuclei (AGN) fuelling relies on the transport of gas across several orders of magnitude in physical scale until the gas reaches the supermassive black hole at the centre of a galaxy. This work explores the…

We conduct a statistical study of black hole masses of barred and unbarred galaxies in the IllustrisTNG100 cosmological magneto-hydrodynamical simulations. This work aims to understand the role of the bars in the growth of central…

Astrophysics of Galaxies · Physics 2023-11-02 Sandeep Kumar Kataria , M. Vivek

Representing simultaneous black hole accretion during a merger, binary active galactic nuclei (AGNs) could provide valuable observational constraints to models of galaxy mergers and AGN triggering. High-resolution radio interferometer…

Astrophysics of Galaxies · Physics 2015-12-09 Hai Fu , J. M. Wrobel , A. D. Myers , S. G. Djorgovski , Lin Yan

Bar-induced gas inflows towards the galaxy centres are recognized as a key agent for the secular evolution of galaxies. One immediate consequence is the accumulation of gas in the centre of galaxies where it can form stars and alter the…

Astrophysics of Galaxies · Physics 2015-12-09 E. Florido , A. Zurita , I. Perez , E. Perez-Montero , P. R. T. Coelho , D. A. Gadotti

Stellar bars are a common feature in massive disc galaxies. On a theoretical ground, the response of gas to a bar is generally thought to cause nuclear starbursts and, possibly, AGN activity once the perturbed gas reaches the central…

Astrophysics of Galaxies · Physics 2015-10-28 R. Fanali , M. Dotti , D. Fiacconi , F. Haardt

Active galactic nuclei (AGN) are powered by the accretion of disks of gas onto supermassive black holes (SMBHs). Stars and stellar remnants orbiting the SMBH in the nuclear star cluster (NSC) will interact with the AGN disk. Orbiters…

Astrophysics of Galaxies · Physics 2020-11-02 Gaia Fabj , Syeda S. Nasim , Freddy Caban , K. E. Saavik Ford , Barry McKernan , Jillian M. Bellovary

A systematic study of the nuclear emission of a sample of 97 spirals in isolated galaxy pairs with mixed morphology (E+S) shows that: 1) AGN activity is found in 40% of the spiral galaxies in these pairs, 2) Only one out of the 39 AGN found…

We present a spectroscopic study of the incidence of AGN nuclear activity in two samples of isolated galaxies (Karachentseva, V.E. & Varela, J.). Our results show that the incidence of non-thermal nuclear activity is about 43% and 31% for…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-05 Francisco Hernandez-Ibarra , Deborah Dultzin , Yair Krongold , Ascencion Del Olmo , Jaime Perea , Jesus Gonzalez

We investigate the effects of Active Galactic Nuclei (AGN) on the gas kinematics of their host galaxies, using MaNGA data for a sample of 62 AGN hosts and 109 control galaxies (inactive galaxies). We compare orientation of the line of nodes…

High-resolution X-ray observations offer a unique tool for probing the still elusive connection between galaxy mergers and active galactic nuclei (AGNs). We present an analysis of nuclear X-ray emission in an optically selected sample of 92…

Astrophysics of Galaxies · Physics 2023-06-07 Lin He , Meicun Hou , Zhiyuan Li , Shuai Feng , Xin Liu

We present spatially resolved kinematic measurements of stellar and ionized gas components of dwarf galaxies in the stellar mass range $10^{8.5} - 10^{10} M_{\odot}$, selected from SDSS DR7 and DR8 and followed-up with Keck/LRIS…

Astrophysics of Galaxies · Physics 2020-09-04 Christina M Manzano-King , Gabriela Canalizo

During galaxy mergers, gas and dust is driven towards the centers of merging galaxies, triggering enhanced star formation and supermassive black hole (SMBH) growth. Theory predicts that this heightened activity peaks at SMBH separations…

Galaxy mergers are predicted to trigger accretion onto the central supermassive black holes, with the highest rates occurring during final coalescence. Previously, we have shown elevated rates of both optical and mid-IR selected active…

Astrophysics of Galaxies · Physics 2020-07-08 Nathan Secrest , Sara Ellison , Shobita Satyapal , Laura Blecha

We studied AGN activity in twelve LSSs in the ORELSE survey, at 0.65<z<1.28, using a combination of Chandra observations, optical and NIR imaging and spectroscopy. We located a total of 61 AGNs across our sample that were successfully…

Astrophysics of Galaxies · Physics 2017-01-18 N. Rumbaugh , B. Lemaux , A. Tomczak , D. Kocevski , L. Lubin , P. -F. Wu , R. Gal , L. Shen , A. Mansheim , C. Fassnacht , G. Squires
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