Results 81 to 90 of about 126,286 (222)

The First Triple Radio Active Galactic Nucleus in an Ongoing Galaxy Merger

The Astrophysical Journal Letters
Galaxy mergers are predicted to be a critical stage of merger-driven SMBH growth and galaxy evolution. Systems exhibiting multiple active galactic nuclei (AGN) are an important observational tool for constraining the prevalence and properties of merging ...
Emma Schwartzman, Ryan W. Pfeifle, Tracy E. Clarke, Kimberly A. Weaver, Nathan J. Secrest, Barry Rothberg, Miranda McCarthy, Daniel Stern, Peter G. Boorman, Joanna Piotrowska   +9 more
doaj   +1 more source

Circular Polarisation in AGN [PDF]

Publications of the Astronomical Society of Australia, 2002
AbstractWe discuss the constraints that recent observations place on circular polarisation in AGN. In many sources the circular polarisation is variable on short timescales, indicating that it originates in compact regions of the sources. The best prospects for gleaning further information about circular polarisation are high resolution VLBI and ...
openaire   +2 more sources

Nurr1 Orchestrates Claustrum Development and Functionality

Advanced Science, Volume 13, Issue 13, 3 March 2026.
Nurr1 (Nr4a2) is the master transcription factor to control claustrum morphogenesis and cell fate decision postmitotically by inhibiting intracellular G‐protein signaling. Nurr1 deficiency alters the transcriptomic profiles of subcortical claustral neurons into neocortical insular neurons, resulting in defected claustrum development, impaired axonal ...
Kuo Yan, Andrew G. Newman, Pauline Lange, Susanne Müller, Marco Foddis, Stefan Paul Koch, Philipp Böhm‐Sturm, Maron Mantwill, Carsten Finke, Penghui Deng, Melissa Long, Dietmar Schmitz, Victor Tarabykin   +12 more
wiley   +1 more source

MACER3D—An Upgrade of MACER2D with Enhanced Subgrid Models and Gas Physics—and Its Application to Simulating AGN Feedback in a Massive Elliptical Galaxy

The Astrophysical Journal
We present Multiscale AGN-regulated Cosmic Ecosystem Resolver in 3D (MACER3D), a new suite of three-dimensional hydrodynamic simulations that study active galactic nuclei (AGN) feedback on galactic scales over gigayears in duration, with major ...
Haoen Zhang, Haojie Xia, Suoqing Ji, Feng Yuan, Minhang Guo, Rui Zhang, Bocheng Zhu, Yihuan Di, Aoyun He, Tingfang Su, Yuxuan Zou   +10 more
doaj   +1 more source

X-ray bright active galactic nuclei in massive galaxy clusters III: New insights into the triggering mechanisms of cluster AGN

, 2014
We present the results of a new analysis of the X-ray selected Active Galactic Nuclei (AGN) population in the vicinity of 135 of the most massive galaxy clusters in the redshift range of 0.2 < z < 0.9 observed with Chandra.
Allen, S. W., Brandt, W. N., Canning, R. E. A., Ehlert, S., Luo, B., Mantz, A., Morris, R. G., von der Linden, A., Xue, Y. Q.   +8 more
core   +1 more source

A Multiwavelength Evaluation of AGN in the Post-starburst Phase

The Astrophysical Journal
The quenching of star formation is a crucial phase in galaxy evolution. Although feedback from active galactic nuclei (AGN) has been proposed as a key driver of this transition, the lack of strong AGN in nearby quenching galaxies raises questions about ...
Yuanze Luo, Kate Rowlands, Katherine Alatalo, Lauranne Lanz, Timothy Heckman, Elizaveta Sazonova, Pallavi Patil, Omar Almaini, Vincenzo R. D’Onofrio, K. Decker French, Justin Otter, Andreea O. Petric, Namrata Roy, Maya Skarbinski, Justin S. Spilker, Margaret E. Verrico, Vivienne Wild   +16 more
doaj   +1 more source

The Cluster and Field Galaxy AGN Fraction at z = 1 to 1.5: Evidence for a Reversal of the Local Anticorrelation Between Environment and AGN Fraction

, 2012
The fraction of cluster galaxies that host luminous AGN is an important probe of AGN fueling processes, the cold ISM at the centers of galaxies, and how tightly black holes and galaxies co-evolve.
Bautz, M., Brodwin, M., Brown, M. J. I., Dey, A., Eisenhardt, P. R., Galametz, A., Gonzalez, Anthony H., Hickox, R. C., Jannuzi, B. T., Jones, C., Martini, Paul, Miller, Eric D., Murray, S., Norman, D., Stanford, S. A., Stern, D.   +15 more
core   +1 more source

Kinematics of AGN jets

Journal of Physics: Conference Series, 2008
The fine-scale structure and the kinematics of relativistic active galactic nuclei (AGN) jets have been studied by very-long-baseline interferometry at very high resolutions since 1998 at 2 cm wavelength for a sample of over a hundred radio sources (VLBA 2cm Survey and MOJAVE programs).
openaire   +2 more sources

Galaxies Lighting Up: Discovery of Seventy New Turn-on Changing-look Active Galactic Nuclei

The Astrophysical Journal
“Changing-look active galactic nuclei” (CL AGN) show dramatic, rapid changes in optical/UV continuum and broad-line emission. The majority of CL AGN have been found dimming as “turn-off” CL AGN because most selection methods start from samples of ...
Qian Yang, Paul J. Green, Xue-Bing Wu, Michael Eracleous, Linhua Jiang, Yuming Fu   +5 more
doaj   +1 more source

On the Lx-L6micron ratio as a diagnostic for Compton-thick AGN

, 2011
As the mid-IR luminosity represents a good isotropic proxy of the AGN power, a low X-ray to mid-IR luminosity ratio is often claimed to be a reliable indicator for selecting Compton-thick (CT) AGN. We assess the efficiency of this diagnostic by examining
A. Akylas, A. Comastri, Aird, Ajello, Akylas, Alexander, Alexander, Alexander, Ballantyne, Bongiorno, Braito, Brandt, Brightman, Brightman, Brunner, Burlon, C. Vignali, Cash, Catdamone, Chary, Churazov, Comastri, Comastri, Comastri, Daddi, Damen, Dickey, Donley, E. Rovilos, Eckart, Feruglio, Fiore, Fiore, Frontera, Fukazawa, Georgakakis, Georgakakis, Georgakakis, Georgantopoulos, Georgantopoulos, Georgantopoulos, Georgantopoulos, Georgantopoulos, Giacconi, Gilli, Gilli, Gilli, Goulding, Hao, I. Balestra, I. Georgantopoulos, Iwasawa, La Franca, Luo, Luo, Lutz, Magnelli, Maiolino, Marconi, Matt, Merloni, Moran, Moretti, N. Cappelluti, Norman, P. Ranalli, Paltani, Polletta, R. Gilli, Richards, Rosenthal, Rush, Sazonov, Silva, Skrutskie, Soifer, Soltan, Taylor, Terashima, Tozzi, Treister, Treister, Tueller, Tzanavaris, Ueda, Ueda, Vignali, Winter, Wolf, Wu, Xue, Yaqoob, Yaqoob   +92 more
core   +1 more source