Results 51 to 60 of about 1,281,453 (204)

Different Dependence of Narrow Hα Line Luminosity on Optical Continuum Luminosity between Star-forming Galaxies and Type 2 Active Galactic Nuclei: Globally Negative AGN Feedback in Local Type 2 AGN?

The Astrophysical Journal
In this manuscript, clues are provided to support globally negative active galactic nuclei (AGN) feedback on star formation in the host galaxies of the local low-redshift Sloan Digital Sky Survey (SDSS) Type 2 AGN, based on the different dependence of ...
XueGuang Zhang
doaj   +1 more source

AGN outflows and the cluster cooling flow conundrum

, 2011
Temperature distributions within cores of galaxy clusters indicate gas in the core should cool down rapidly and contract. The cooling flow problem involves the hypothesis that the rapidly cooling gas should eventually condensate into unobserved molecular
Klees, Ilja
core   +1 more source

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

The Search for Very High Energy γ-rays from Misaligned AGN [PDF]

, 2013
The aim of this work is to study the potential for emission at very high energies (100 GeV) by misaligned active galactic nuclei (AGN) and the future prospects for observations of these objects with the next generation imaging atmospheric Cherenkov ...
CHEESEBROUGH, ALISTAIR
core  

Spatially Resolved Active Galactic Nucleus Ionization and Star Formation at Cosmic Noon with JWST/JEMS

The Astrophysical Journal
At cosmic noon ( z  ≈ 2–3), both star formation and active galactic nucleus (AGN) activity peaked, each playing a significant role in ionizing interstellar gas on galaxy-wide scales. The spatial distribution of this ionized gas provides a direct probe of
Sophie Lebowitz, Kevin N. Hainline, Stéphanie Juneau, Christina C. Williams, Swayamtrupta Panda, Jianwei Lyu, Michael V. Maseda, Sandro Tacchella, Yongda Zhu, Jessica L. Aguayo   +9 more
doaj   +1 more source

Galáxias post-starburst no universo local [PDF]

, 2014
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas, Programa de Pós-Graduação em Física, Florianópolis, 2014Galáxias post-starburst (PSB) apresentam espectros com fortes linhas de absorção na série ...
Werle, Ariel
core  

AGN-host connection at 0.5 <  [PDF]

, 2017
We explore the dependence of the incidence of moderate-luminosity (L0.5−8 keV = 1041.9−43.7 erg s-1) active galactic nuclei (AGNs) and the distribution of their accretion rates on host color at 0.5 1010 M⊙.
S. Juneau, E. Daddi, X.-Z. Zheng, Shi, Y., C. Schreiber, B. Luo, Huang, J.-S., Daddi, E., Wang, T., Y. Q. Xue, Xue, Y.Q., Wang, Tao, X.-W. Shu, Q.-S. Gu, Schreiber, C., J. M. Gabor, J.-S. Huang, Gabor, J. M., Zheng, X.-Z., Gu, Q.-S., Shu, X.-W., Y. Shi, D. M. Alexander, Alexander, D.M., Juneau, S., S. Wuyts, Xue, Y. Q., Alexander, D. M., Wuyts, S., Gabor, J.M., Tao Wang, D. Elbaz, G.-W. Fang, Elbaz, D., Luo, B., Fang, G.-W.   +35 more
core   +1 more source

The dynamics of molecular gas in nearby galaxies [PDF]

, 2013
Includes abstract.
Frank, Bradley Stanton
core   +1 more source

The Kiloparsec-scale Influence of the AGN in NGC 1068 with SALT RSS Fabry–Pérot Spectroscopy

The Astronomical Journal, 2023
We present Fabry–Pérot (FP) imaging and longslit spectroscopy of the nearby Seyfert II galaxy NGC 1068 using the Robert Stobie Spectrograph (RSS) on the Southern African Large Telescope (SALT) to observe the impact of the central active galactic nucleus (
Raphael E. Hviding, Ryan C. Hickox, Petri Väisänen, Rajin Ramphul, Kevin N. Hainline   +4 more
doaj   +1 more source

The evolution of galaxies and AGN from deep x-ray and optical surveys [PDF]

, 2004
Two complementary new surveys of the x-ray background (XRB), the WHDF and the 10 X 10 ks, are presented. 140 serendipitous x-ray hard and soft sources (S(_2)-10 keV 3. 10(^15); S0.5-2 keV 4 .
Mumbrú, Marc Vallbé
core