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Recent observations and simulations have challenged the long-held paradigm that mergers are the dominant mechanism driving the growth of both galaxies and supermassive black holes (SMBH), in favour of non-merger (secular) processes. In this…

In this work, we study the relation of cosmic environment and morphology with the star-formation (SF) and the stellar population of galaxies. Most importantly, we examine if this relation differs for systems with active and non-active…

Astrophysics of Galaxies · Physics 2023-07-12 G. Mountrichas , G. Yang , V. Buat , B. Darvish , M. Boquien , Q. Ni , D. Burgarella , L. Ciesla

The unified model of active galactic nuclei (AGNs) proposes that different AGN optical spectral types are caused by different viewing angles with respect to an obscuring 'torus'. Therefore, this model predicts that type 1 and type 2 AGNs…

Astrophysics of Galaxies · Physics 2019-06-12 Fan Zou , Guang Yang , William N. Brandt , Yongquan Xue

The 9-month Swift Burst Alert Telescope (BAT) catalog provides the first unbiased (log N_H < 24) look at local (<z> = 0.03) AGN. In this paper, we present the collected X-ray properties (0.3 - 12keV) for the 153 AGN detected. In addition,…

Astrophysics · Physics 2011-02-11 L. M. Winter , R. Mushotzky , C. S. Reynolds , J. Tueller

Over the last 12 years, AGN monitoring by RXTE, has revolutionised our understanding of the X-ray variability of AGN, of the relationship between AGN and Galactic black hole X-ray binaries (BHBs) and hence of the accretion process itself,…

High Energy Astrophysical Phenomena · Physics 2014-11-20 I. M. McHardy

The feedback from radio-loud active galactic nuclei (R-AGN) may help maintain low star formation (SF) rates in their early-type hosts, but the observational evidence for this mechanism has been inconclusive. We study systematic differences…

Astrophysics of Galaxies · Physics 2016-02-17 Cameron Pace , Samir Salim

We conducted 3D-MHD simulations to investigate the feedback processes in the central 1kpc scale of galaxies hosting both active star formation (SF) and an AGN wind. Our simulations naturally generated a turbulent and clumpy interstellar…

Astrophysics of Galaxies · Physics 2023-06-21 William E. Clavijo-Bohórquez , Elisabete M. de Gouveia Dal Pino , Claudio Melioli

We present the most complete study to date of the X-ray emission from star-formation in high redshift (median z=0.7; z<1.5), IR-luminous (L_IR=10^10-10^13 L_sun) galaxies detected by Herschel's PACS and SPIRE instruments. For our purpose we…

We present a study of optically-selected Type II AGN at 0.5 < z < 0.9 from the VIPERS and VVDS surveys, to investigate the connection between AGN activity and physical properties of their host galaxies. The host stellar mass is estimated…

The systematic analysis of optical large-scale surveys has revealed a population of dwarf galaxies hosting AGN, which have been confirmed by X-ray follow-up observations. Recently, the MaNGA survey identified six dwarf galaxies that appear…

Astrophysics of Galaxies · Physics 2019-01-09 Sophie Koudmani , Debora Sijacki , Martin A. Bourne , Matthew C. Smith

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…

Astrophysics of Galaxies · Physics 2019-07-04 Zhong-yi Man , Ying-jie Peng , Xu Kong , Ke-xin Guo , Cheng-peng Zhang , Jing Dou

We study the relation of active galactic nuclei (AGNs) to star formation in their host galaxies. Our sample includes 205 Type-1 and 85 Type-2 AGNs, 162 detected with Herschel, from fields surrounding 30 galaxy clusters in the Local Cluster…

Astrophysics of Galaxies · Physics 2015-08-19 Lei Xu , G. H. Rieke , E. Egami , C. P. Haines , M. J. Pereira , G. P. Smith

We study the spatially resolved star formation, gas ionisation, and outflow properties of 1813 active galactic nuclei (AGNs) from the MaNGA survey, which we classify into infrared (IR), broad-line (BL), narrow-line (NL), and radio (RD) AGNs…

Astrophysics of Galaxies · Physics 2026-02-18 Gaoxiang Jin , Guinevere Kauffmann , Y. Sophia Dai , Martin J. Hardcastle , Bohan Yue

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…

We study variability of active galactic nuclei (AGNs) by using the deep optical multiband photometry data obtained from the Hyper Suprime-Cam Subaru Strategic Program (HSC SSP) survey in the COSMOS field. The images analyzed here were taken…

Astrophysics of Galaxies · Physics 2020-05-13 Yuki Kimura , Toru Yamada , Mitsuru Kokubo , Naoki Yasuda , Tomoki Morokuma , Tohru Nagao , Yoshiki Matsuoka

The clustering of active galactic nuclei (AGN) sheds light on their typical large (Mpc-scale) environments, which can constrain the growth and evolution of supermassive black holes. Here we measure the clustering of luminous X-ray-selected…

Astrophysics of Galaxies · Physics 2020-03-11 M. C. Powell , C. M. Urry , N. Cappelluti , J. T. Johnson , S. M. LaMassa , T. T. Ananna , K. E. Kollmann

We constrain the temporal power spectrum of the sSFR(t) of star-forming galaxies, using a well-defined sample of Main Sequence galaxies from MaNGA and our earlier measurements of the ratio of the SFR averaged within the last 5 Myr to that…

Astrophysics of Galaxies · Physics 2020-05-27 Enci Wang , Simon J. Lilly

We investigate the effect of environment on the presence and fuelling of Active Galactic Nuclei (AGN) by identifying galaxies hosting AGN in massive galaxy clusters and the fields around them. We have identified AGN candidates via optical…

Astrophysics of Galaxies · Physics 2014-07-29 Alison J. Klesman , Vicki L. Sarajedini

We examine the demographics of radio-emitting active galactic nuclei (AGN) in the local universe as a function of host galaxy properties, most notably both stellar mass and star formation rate. Radio AGN activity is theoretically implicated…

Astrophysics of Galaxies · Physics 2024-04-09 Arjun Suresh , Michael R. Blanton

To understand star formation in galaxies, we investigate the star formation rate (SFR) surface density ($\Sigma_{\rm SFR}$) profiles for galaxies, based on a well-defined sample of 976 star-forming MaNGA galaxies. We find that the typical…

Astrophysics of Galaxies · Physics 2019-06-12 Enci Wang , Simon J. Lilly , Gabriele Pezzulli , Jorryt Matthee