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Utilizing Chandra X-ray observations in the All-wavelength Extended Groth Strip International Survey (AEGIS) we identify 241 X-ray selected Active Galactic Nuclei (AGNs, L > 10^{42} ergs/s) and study the properties of their host galaxies in…

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

Emission from active galactic nuclei (AGNs) is known to play an important role in the evolution of many galaxies including luminous and ultraluminous systems (U/LIRGs), as well as merging systems. However, the extent, duration, and exact…

We measure star formation rates of ~50,000 optically-selected galaxies in the local universe (z~0.1), spanning a range from gas-rich dwarfs to massive ellipticals. We obtain dust-corrected SFRs by fitting the GALEX (UV) and SDSS (optical)…

We examine the relationship between star formation and AGN activity by constructing matched samples of local ($0<z<0.6$) radio-loud and radio-quiet AGN in the $\textit{Herschel}$-ATLAS fields. Radio-loud AGN are classified as…

Astrophysics of Galaxies · Physics 2015-08-19 G. Gurkan , M. J. Hardcastle , M. J. Jarvis , D. J. B. Smith , N. Bourne , L. Dunne , S. Maddox , R. J. Ivison , J. Fritz

In this study we investigate the relationship between the star formation rate, SFR, and AGN luminosity, L(AGN), for ~2000 X-ray detected AGN. The AGN span over three orders of magnitude in X-ray luminosity (10^(42) < L(2-8keV) < 10^(45.5)…

Astrophysics of Galaxies · Physics 2015-08-26 F. Stanley , C. M. Harrison , D. M. Alexander , A. M. Swinbank , J. A. Aird , A. Del Moro , R. C. Hickox , J. R. Mullaney

We investigate the star-forming properties of 1620 X-ray selected AGN host galaxies as a function of their specific X-ray luminosity (i.e., X-ray luminosity per unit host stellar mass) -- a proxy of the Eddington ratio. Our motivation is to…

Astrophysics of Galaxies · Physics 2016-05-04 E. Bernhard , J. R. Mullaney , E. Daddi , L. Ciesla , C. Schreiber

I will review the tips learned from panchromatic modeling of active galactic nuclei (AGNs), based on our recent work to study the relationship between AGN and star formation (SF). Several AGN SED models are compared, and signifficant AGN…

Astrophysics of Galaxies · Physics 2020-06-17 Y. Sophia Dai

Understanding the connection between active galactic nuclei and star-formation (the AGN-SF connection) is one of the longest standing problems in modern astrophysics. In the age of large Integral Field Unit (IFU) surveys, studies of the…

Astrophysics of Galaxies · Physics 2026-03-11 Aman Chopra , Henry R. M. Zovaro , Rebecca L. Davies

The most rapidly evolving regions of galaxies often display complex optical spectra with emission lines excited by massive stars, shocks and accretion onto supermassive black holes. Standard calibrations (such as for the star formation…

We present a study of the active galactic nucleus (AGN) activity in the local Universe (z < 0.33) and its correlation with the host galaxy properties, derived from a Sloan Digital Sky Survey (SDSS DR8) sample with spectroscopic…

We investigate the far-infrared (far-IR) incidence of X-ray-selected active galactic nuclei (AGN) and non-AGN galaxies as a function of stellar mass (M$_*$), star formation rate (SFR), and specific black hole accretion rate…

Astrophysics of Galaxies · Physics 2025-08-27 G. Mountrichas , F. J. Carrera , I. Georgantopoulos , S. Mateos , A. Ruiz , A. Corral

Galaxy evolution and extragalactic astronomy research depend on an understanding of the interactions between active galactic nuclei (AGN) and their host galaxies. We investigate the relationships between X-ray luminosity (Lx), star…

Astrophysics of Galaxies · Physics 2025-09-03 SH. M. Shehata , F. Shaban , R. M. Samir

The assembly and co-evolution of supermassive black holes (SMBH) and their host galaxy stellar population is a key open questions in galaxy evolution. Stellar mass ($M_\star$) and star formation rate (SFR), are inferred by modeling the…

We investigate the correlation between ionized gas outflows, jets, and star formation in a sample of 42 local type-I active galactic nuclei (AGNs) exhibiting significant [O III] outflows. This study uses both new submillimeter (sub-mm)…

Astrophysics of Galaxies · Physics 2026-01-16 Chen Qin , Huynh Anh N. Le , Yongquan Xue , Shifu Zhu , Xiaozhi Lin , Kim Ngan Nhat Nguyen

We use X-ray Active Galactic Nuclei (AGN) observed by the Chandra X-ray Observatory within the 9.3 deg$^2$ Bo$\rm \ddot{o}$tes field of the NDWFS to study whether there is a correlation between X-ray luminosity (L$_X$) and star formation…

Astrophysics of Galaxies · Physics 2021-10-05 G. Mountrichas , V. Buat , G. Yang , M. Boquien , D. Burgarella , L. Ciesla , K. Malek , R. Shirley

We analyzed a sample of $\sim$113,000 galaxies ($\rm z < 0.3$) from the Sloan Digital Sky Survey, divided into star-forming, composite, Seyfert, and LINER types, to explore the relationships between UV-to-optical colors ($\rm u-r$), star…

Astrophysics of Galaxies · Physics 2024-12-20 Huynh Anh N. Le , Yongquan Xue

The effects of Active Galactic Nuclei (AGNs) on their host-galaxies depend on the coupling between the injected energy and the interstellar medium (ISM). Here, we model and quantify the impact of long-range AGN ionizing radiation -- in…

Astrophysics of Galaxies · Physics 2015-02-09 Orianne Roos , Stéphanie Juneau , Frédéric Bournaud , Jared M. Gabor

Using the wide multi-band photometry available in the COSMOS field we explore the host galaxy properties of a large sample of Active Galactic Nuclei (AGN) obtained by combining X-ray and optical spectroscopic selections. Based on a careful…