Results 71 to 80 of about 1,281,453 (204)

Obscured AGN at z < 1.5: X-Ray to Far-infrared SEDs and Host Galaxy Morphologies in the GOODS Fields

The Astrophysical Journal
We present an analysis of spectral energy distributions (SEDs), galaxy light profiles, and visual morphological classifications for 194 X-ray luminous active galactic nuclei (AGN) (intrinsic absorption-corrected $\mathrm{log}({L}_{{\rm{X}},0.5-7\,{\rm ...
William W.H. Jarvis, Connor Auge, David Sanders, Xuheng Ding, Jeana Kim-Bolt, C. Megan Urry, Eric Hooper, Alessandro Peca, Aritra Ghosh, Chuan Tian, Tonima T. Ananna, Md Mahmudunnobe   +11 more
doaj   +1 more source

Evolution and Stellar Content of AGN Host Galaxies [PDF]

, 2009
In this dissertation, Active Galactic Nuclei (AGN) and their host galaxies are discussed. Together with transitional events, such as supernovae and gamma-ray bursts, AGN are the most energetic phenomena in the Universe.
Hyvönen, Tomi
core  

Star-forming Nuclear Clusters in Dwarf Galaxies Mimicking Active Galactic Nucleus Signatures in the Mid-infrared

The Astrophysical Journal
Effectively finding and identifying active galactic nuclei (AGNs) in dwarf galaxies is an important step in studying black hole formation and evolution.
Megan R. Sturm, Bayli Hayes, Amy E. Reines   +2 more
doaj   +1 more source

Black holes in the low-mass galaxy regime

Astronomy & Astrophysics
Context. Active galactic nuclei (AGNs) have been observed in dwarf galaxies, yet the impact of black hole feedback in these low-mass systems remains unclear. Aims.
Flores-Freitas R., Wylezalek D., Trevisan M., Albán M., Riffel R. A., Bertemes C., Schnorr-Müller A., Riffel R., Dall’Agnol de Oliveira B., Kukreti P.   +9 more
doaj   +1 more source

UNCOVER: Candidate Red Active Galactic Nuclei at 3 < z < 7 with JWST and ALMA

The Astrophysical Journal
The James Webb Space Telescope (JWST) is revolutionizing our knowledge of z > 5 galaxies and their actively accreting black holes. Using the JWST Cycle 1 Treasury program Ultradeep NIRSpec and NIRCam Observations before the Epoch of Reionization (UNCOVER)
Ivo Labbe, Jenny E. Greene, Rachel Bezanson, Seiji Fujimoto, Lukas J. Furtak, Andy D. Goulding, Jorryt Matthee, Rohan P. Naidu, Pascal A. Oesch, Hakim Atek, Gabriel Brammer, Iryna Chemerynska, Dan Coe, Sam E. Cutler, Pratika Dayal, Robert Feldmann, Marijn Franx, Karl Glazebrook, Joel Leja, Michael Maseda, Danilo Marchesini, Themiya Nanayakkara, Erica J. Nelson, Richard Pan, Casey Papovich, Sedona H. Price, Katherine A. Suess, Bingjie Wang, John R. Weaver, Katherine E. Whitaker, Christina C. Williams, Adi Zitrin   +31 more
doaj   +1 more source

AGN Feedback Signatures in UV Emission

Galaxies
Supermassive black holes (SMBH) are believed to influence galaxy evolution through AGN (active galactic nuclei) feedback. Galaxy mergers are key processes of galaxy formation that lead to AGN activity and star formation.
K. Rubinur
doaj   +1 more source

Pair-Matching of Radio-Loud and Radio-Quiet AGNs

Frontiers in Astronomy and Space Sciences, 2017
Active galactic nuclei (AGNs) are known to cover an extremely broad range of radio luminosities and the spread of their radio-loudness is very large at any value of the Eddington ratio.
Dorota Kozieł-Wierzbowska, Grażyna Stasińska, Natalia Vale Asari, Marek Sikora, Elisa Goettems, Anna Wójtowicz   +5 more
doaj   +1 more source

The connection between jets and host galaxies of radio loud AGN: Blazars vs NLSy1s

, 2018
This doctoral dissertation discuss the main properties of the host galaxies of those active galactic nuclei (AGN) capable of generating strong relativistic jets (and therefore, capable of emitting up to the γ−ray energy ranges) and with their jets ...
Alejandro Olguín Iglesias
core  

The Astrid Simulation: Evolution of Black Holes and Galaxies to z = 0.5 and Different Evolution Pathways for Galaxy Quenching

The Astrophysical Journal
We present new results from the ASTRID simulation from z = 3 to z = 0.5, covering the epoch of cosmic noon. The galaxy stellar mass function, as well as the black hole mass and luminosity functions in ASTRID , exhibit good agreement with recent ...
Yueying Ni, Nianyi Chen, Yihao Zhou, Minjung Park, Yanhui Yang, Tiziana Di Matteo, Simeon Bird, Rupert Croft   +7 more
doaj   +1 more source

Star Formation Characteristics of Galaxies Hosting AGN

Bulletin de la Société Royale des Sciences de Liège
We present an analysis of the ultra-violet (UV) observations of two Seyfert type active galactic nuclei (AGN), namely NGC 4051 and NGC 4151. These observations aimed at studying the star formation in the hosts of these AGN were carried out with the ultra-violet imaging telescope on board AstroSat in far-UV.
Nandi, Payel, Stalin, C. S.
openaire   +2 more sources