Results 61 to 70 of about 576 (185)

Possibleγ-ray Signals from Low-luminosity Active Galactic Nuclei [PDF]

, 2012
Hajime Takami
openalex   +1 more source

Radio Emission from High-redshift Active Galactic Nuclei in the JADES and CEERS Surveys

The Astronomical Journal
Recent calculations indicate that radio emission from quasars at z ∼ 6–7 could be detected at much earlier stages of evolution, at z ∼ 14–15, by the Next-Generation Very Large Array (ngVLA) and the Square Kilometer Array (SKA).
Muhammad A. Latif, Ammara Aftab, Daniel J. Whalen   +2 more
doaj   +1 more source

Possible High-Redshift, Low-Luminosity Active Galactic Nuclei in the Hubble Deep Field [PDF]

, 1998
R.Michael Jarvis, Gordon M. MacAlpine, R.Michael Jarvis, Gordon M. MacAlpine   +3 more
openalex   +1 more source

Strongly Magnetized Accretion with Low Angular Momentum Produces a Weak Jet

The Astrophysical Journal
We study the spherical accretion of magnetized plasma with low angular momentum onto a supermassive black hole, utilizing global general relativistic magnetohydrodynamic simulations.
Alisa Galishnikova, Alexander Philippov, Eliot Quataert, Koushik Chatterjee, Matthew Liska   +4 more
doaj   +1 more source

Self-Similar Solution of Hot Accretion Flow with Anisotropic Pressure

Universe, 2019
For the accretion flow in extremely low-luminosity active galactic nuclei, such as our Galactic center (Sgr A*) and M 87, the collisional mean-free path of ions may be much larger than its gyroradius.
De-Fu Bu, Pei-Yao Xu, Bo-Cheng Zhu
doaj   +1 more source

Low-Luminosity Accretion in Black Hole X-Ray Binaries and Active Galactic Nuclei [PDF]

, 2005
Ramesh Narayan
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VARIABILITY-SELECTED LOW-LUMINOSITY ACTIVE GALACTIC NUCLEI IN THE 4 Ms CHANDRA DEEP FIELD-SOUTH [PDF]

, 2012
M Young, W. N. Brandt, Yongquan Xue, M. Paolillo, David M. Alexander, F. E. Bauer, B. D. Lehmer, Birong Luo, O. Shemmer, D. P. Schneider, C. VIGNALI, M Young, W. N. Brandt, Yongquan Xue, M. Paolillo, David M. Alexander, F. E. Bauer, B. D. Lehmer, Birong Luo, O. Shemmer, D. P. Schneider, C. VIGNALI   +21 more
openalex   +1 more source

Ensemble Variability Properties of Active Galactic Nuclei in the SDSS DR17

The Astrophysical Journal
We present the results from a study of ∼9600 broadline-selected active galactic nuclei (AGNs) with host galaxies detected from the Sloan Digital Sky Survey (SDSS) Data Release 17.
Krittapas Chanchaiworawit, Vicki Sarajedini   +1 more
doaj   +1 more source

Continuum Reverberation in Active Galactic Nuclei Disks Only with Sufficient X-Ray Luminosity and Low Albedo

The Astrophysical Journal
Disk continuum reverberation mapping is one of the primary ways we learn about active galactic nuclei (AGN) accretion disks. Reverberation mapping assumes that time-varying X-rays incident on the accretion disk drive variability in UV–optical light ...
Amy Secunda, Yan-Fei Jiang, Jenny E. Greene   +2 more
doaj   +1 more source

EVIDENCE OF PARSEC-SCALE JETS IN LOW-LUMINOSITY ACTIVE GALACTIC NUCLEI [PDF]

, 2014
Mar Mezcua, M. Prieto
openalex   +1 more source