Results 141 to 150 of about 9,238,867 (222)

RELATIONSHIP BETWEEN THE KINETIC POWER AND BOLOMETRIC LUMINOSITY OF JETS: LIMITATION FROM BLACK HOLE X-RAY BINARIES, ACTIVE GALACTIC NUCLEI, AND GAMMA-RAY BURSTS

, 2014
The correlation between the kinetic power P-jet and intrinsic bolometric luminosity L-jet of jets may reveal the underlying jet physics in various black hole systems.
Ma, Renyi, Xie, Fu-Guo, Hou, Shujin
core  

Strong Amplitude Modulation of Hard-band X-Ray Quasiperiodic Oscillation with Soft-band Flux in RE J1034+396

The Astrophysical Journal
The X-ray quasiperiodic oscillation (QPO) is a remarkable form of variability in systems of compact object accretion. RE J1034+396, harboring the most significant X-ray QPO in active galactic nuclei (AGNs), is the most noteworthy source for in-depth ...
Ruisong Xia, Hao Liu, Yongquan Xue
doaj   +1 more source

4MOST Consortium Survey 6: Active galactic nuclei

, 2019
X-ray and mid-infrared emission are signposts of the accretion of matter onto the supermassive black holes that reside at the centres of most galaxies.
McMahon, R., Wisotzki, L., Worseck, G., Shanks, T., Rosario, D., Boller, T., Dwelly, T., Fotopoulou, S., Croom, S., Steinmetz, M., Alexander, D., Finoguenov, A., Comparat, J., Alexander, D. A., Merloni, A., Krumpe, M., Salvato, M., Banerji, M., Nandra, K., Schwope, A., Lamer, G.   +20 more
core   +1 more source

First Observational Evidence for an Interconnected Evolution between Time Lag and QPO Frequency among AGNs

The Astrophysical Journal Letters
Quasiperiodic oscillations (QPOs) have been widely observed in black hole X-ray binaries (BHBs), which often exhibit significant X-ray variations. Extensive research has explored the long-term evolution of the properties of QPOs in BHBs.
Ruisong Xia, Hao Liu, Yongquan Xue
doaj   +1 more source

"Fermi" bubbles are bursting from our galaxy. Their origins remain a mystery. [PDF]

Proc Natl Acad Sci U S A, 2023
Mann A.
europepmc   +1 more source

Extreme Variability Reveals How the Eddington Ratio Regulates Coronal Power in Active Galactic Nuclei

The Astrophysical Journal Letters
The bolometric luminosity ( L _bol ) of active galactic nuclei (AGNs) is a key tracer of accretion physics, but its direct determination is often hindered by limited spectral coverage and contamination of the host galaxy. Bolometric corrections ( κ _λ  = 
Arghajit Jana, Claudio Ricci, Franz E. Bauer, Kriti Kamal Gupta, Benny Trakhtenbrot, Alessia Tortosa, Ruancun Li, Luis C. Ho, Richard Mushotzky, Hsiang-Kuang Chang, Yaherlyn Diaz, Georgios Dimopoulos, Kristína Kallová, Michael J. Koss, Stéphane Paltani, Matthew J. Temple   +15 more
doaj   +1 more source

X-ray absorption in Active Galactic Nuclei

, 2015
I Nuclei Galattici Attivi (AGN) sono tra le sorgenti più luminose dell’Universo e sono osservati in circa 10-20% delle galassie nell’Universo locale. Il meccanismo di generazione dell’energia di queste sorgenti è l’accrescimento di materia su un buco nero supermassivo (SMBH). Secondo il paradigma del Modello Unificato (UM) il SMBH è circondato da un
openaire   +1 more source

Relation between millimeter wavelengths emission and high-energy emission for active galactic nuclei

, 1998
After comparing the Aux densities of a sample of active galactic nuclei detected fly energetic gamma-ray experiment telescope at 90 and 230 GHz with the gamma-ray emissions detected by Compton Gamma-nay Observatory and x-ray emission, a strong ...
Huang, LH, Jiang, DR, Cao, XW
core  

Revealing an Oscillating and Contracting Compact Corona near the Event Horizon of the Supermassive Black Hole in 1ES 1927+654

The Astrophysical Journal Letters
Dynamic processes in the accretion flow near black holes produce X-ray flux variability, sometimes quasiperiodic. Determining its physical origin is key to mapping the accretion geometry but remains unresolved.
Qing-Cang Shui, Shu Zhang, Shuang-Nan Zhang, Hua Feng, Yu-Peng Chen, Long Ji, Ling-Da Kong, Liang Zhang, Jing-Qiang Peng, Peng-Ju Wang   +9 more
doaj   +1 more source

Radio Dim/Gamma-Ray Bright Active Galactic Nuclei

, 2018
Inside virtually every large galaxy lies a supermassive black hole, known as active galactic nuclei. An especially interesting subclass of active galactic nuclei are those that emit high energy radiation.
Bohney, Amanda
core