Results 1 to 10 of about 1,302 (205)

Active galactic nucleus feedback in clusters of galaxies [PDF]

Proceedings of the National Academy of Sciences of the United States of America, 2010
Observations made during the last ten years with the Chandra X-ray Observatory have shed much light on the cooling gas in the centers of clusters of galaxies and the role of active galactic nucleus (AGN) heating. Cooling of the hot intracluster medium in cluster centers can feed the supermassive black holes found in the nuclei of the dominant cluster ...
Elizabeth L Blanton, T E Clarke, Craig L Sarazin   +2 more
exaly   +6 more sources

Ionizing Spotlight of Active Galactic Nucleus

Galaxies, 2023
Ionization cones and relativistic jets give us one of the most large-scale example of active galactic nuclei (AGN) influence on the surrounding gas environment in galaxies and beyond.
Alexei V. Moiseev, Aleksandrina A. Smirnova   +1 more
doaj   +3 more sources

The Changing Active Galactic Nucleus Population

Astrophysical Journal, 2003
We investigate how the fraction of broad-line sources in the active galactic nucleus (AGN) population changes with X-ray luminosity and redshift. We first construct the rest-frame hard-energy (2-8 keV) X-ray luminosity function (HXLF) at z = 0.1-1 using Chandra Lockman Hole-Northwest wide-area data, Chandra Deep Field-North 2 Ms data, other Chandra ...
A J Barger, L L Cowie, Richard Mushotzky   +2 more
exaly   +2 more sources

Extreme properties of a compact and massive accreting black hole host in the first 500 Myr [PDF]

Nature Communications
Little red dots (LRDs) are a high redshift galaxy population. Despite their high number densities, their nature is still uncertain. Here we present CANUCS-LRD-z8.6, a spectroscopically confirmed little red dot at a spectroscopic redshift of z spec = 8 ...
Roberta Tripodi, Nicholas Martis, Vladan Markov, Maruša Bradač, Fabio Di Mascia, Vieri Cammelli, Francesco D’Eugenio, Chris Willott, Mirko Curti, Maulik Bhatt, Simona Gallerani, Gregor Rihtaršič, Jasbir Singh, Gaia Gaspar, Anishya Harshan, Jon Judež, Rosa M. Merida, Guillaume Desprez, Marcin Sawicki, Ilias Goovaerts, Adam Muzzin, Gaël Noirot, Ghassan T. E. Sarrouh, Roberto Abraham, Yoshihisa Asada, Gabriel Brammer, Vicente Estrada-Carpenter, Giordano Felicioni, Seiji Fujimoto, Kartheik Iyer, Lamiya Mowla, Victoria Strait   +31 more
doaj   +2 more sources

The eJWST active galactic nucleus observation catalogue

Astronomy & Astrophysics
Context. The European Archive of the James Webb Space Telescope (eJWST) provides access to all data collected by the James Webb Space Telescope (JWST).
Lenk V., Labiano A., Circosta C., Alonso-Herrero A., Wylezalek D.   +4 more
doaj   +3 more sources

Galactic bars and active galactic nucleus fuelling in the second half of cosmic history

Astronomy & Astrophysics
We investigate the role of galactic bars in fuelling and triggering active galactic nuclei (AGN) in disc galaxies up to z ∼ 0.8. We utilised a deep learning model, fine-tuned on Galaxy Zoo volunteer classifications, to identify (strongly and weakly ...
La Marca A., Nardone M. T., Wang L., Margalef-Bentabol B., Kruk S., Trager S. C.   +5 more
doaj   +3 more sources

THE GALACTIC CENTER: NOT AN ACTIVE GALACTIC NUCLEUS [PDF]

The Astrophysical Journal Supplement Series, 2013
AbstractWe present 10 μm – 35μm Spitzer spectra of the interstellar medium in the central molecular zone (CMZ), the central 210 pc × 60 pc of the Galactic center (GC). We present maps of the CMZ in ionic and H2 emission, covering a more extensive area than earlier spectroscopic surveys in this region.
An, Deokkeun, Ramírez, Solange V., Sellgren, Kris   +2 more
openaire   +4 more sources

Active Galactic Nucleus Quenching in Simulated Dwarf Galaxies

The Astrophysical Journal, 2023
We examine the quenching characteristics of 328 isolated dwarf galaxies $\left({10}^{8}\lt {M}_{\mathrm{star}}/{M}_{\odot }\lt {10}^{10}\right)$ within the Romulus25 cosmological hydrodynamic simulation.
Ray S. Sharma, Alyson M. Brooks, Michael Tremmel, Jillian Bellovary, Thomas R. Quinn   +4 more
doaj   +1 more source

X-ray Insight into High-Energy Processes in Extreme Galactic Nuclear Environment

Universe, 2022
Nuclear regions of galaxies apparently play a disproportionately large role in regulating their formation and evolution. How this regulation works, however, remains very uncertain.
Q. Daniel Wang
doaj   +1 more source

ACTIVE GALACTIC NUCLEUS HOST GALAXY MORPHOLOGIES IN COSMOS [PDF]

The Astrophysical Journal, 2009
We use Hubble Space Telescope/Advanced Camera for Surveys images and a photometric catalog of the Cosmic Evolution Survey (COSMOS) field to analyze morphologies of the host galaxies of ~400 active galactic nucleus (AGN) candidates at redshifts 0.3 < z < 1.0.
J. M. Gabor, C. D. Impey, K. Jahnke, B. D. Simmons, J. R. Trump, A. M. Koekemoer, BRUSA, MARCELLA, N. Cappelluti, E. Schinnerer, V. Smolčić, M. Salvato, J. D. Rhodes, B. Mobasher, P. Capak, R. Massey, A. Leauthaud, N. Scoville   +16 more
openaire   +3 more sources