Results 181 to 190 of about 63,914 (268)

X-ray reverberation in Active Galactic Nuclei

, 2016
Narrow Line Type-1 Seyfert active galaxies can exhibit a high degree of variability in the X-ray regime. This thesis examines that variability in the context of reverberation models, in which a flare in activity has an extended, energy dependent, response. A novel method is developed for estimating the response function in different energy bands.
openaire   +1 more source

Optical characteristics of young quasars as sources of the cosmic X-ray background [PDF]

The sources which dominate the thermal cosmic X-ray background cannot have X-ray spectra similar to the power laws measured for bright active galactic nuclei.
Boldt, E., Leiter, D.
core   +1 more source

Accretion, ejection and reprocessing in supermassive black holes

, 2015
This is a White Paper in support of the mission concept of the Large Observatory for X-ray Timing (LOFT), proposed as a medium-sized ESA mission. We discuss the potential of LOFT for the study of active galactic nuclei.
Bianchi, S., Cappi, M., Czerny, B., Dadina, M., De Marco, B., De Rosa, A., Dovciak, M., Giroletti, M., Karas, V., Kunneriath, D., La Franca, F., Manousakis, A., Marinucci, A., Markowitz, A., McHardy, I., Mehdipour, M., Miniutti, G., Paltani, S., Paolillo, M., Papadakis, I., Perez-Torres, M., Peterson, B., Petrucci, P. O., Piconcelli, E., Ponti, G., Risaliti, G., Rozanska, A., Salvati, M., Sobolewska, M., Svoboda, J., Tombesi, F., Trevese, D., Uttley, P., Vagnetti, F., Vaughan, S., Vignali, C., Vincent, F. H., Zdziarski, A.   +37 more
core  

X-ray reflection from cold matter in Active Galactic Nuclei and X-ray binaries

, 1991
I. George, A. Fabian
semanticscholar   +1 more source

Reverberation lags viewed in hard X-rays from an accreting stellar-mass black hole. [PDF]

Nat Commun
You B, Yu W, Ingram A, De Marco B, Qu JL, Zhu ZH, Santangelo A, Xu SE.   +7 more
europepmc   +1 more source

Reduced gas accretion onto galaxies due to effects of external giant radio lobes. [PDF]

Proc Natl Acad Sci U S A
Qiu Y, Cen R.
europepmc   +1 more source

Energetic spectra from semi-implicit particle-in-cell simulations of magnetic reconnection. [PDF]

Sci Rep
Schoeffler KM, Bacchini F, Kormann K, Eichmann B, Innocenti ME.   +4 more
europepmc   +1 more source

Proton Acceleration with Relativistic Electromagnetic Shock. [PDF]

Adv Sci (Weinh)
Xiao T, Zhang X, Kong F, Zheng X, Gong Z, Shen B.   +5 more
europepmc   +1 more source

An X-ray-emitting protocluster at z ≈ 5.7 reveals rapid structure growth. [PDF]

Nature
Bogdán Á, Schellenberger G, Li Q, Conselice CJ.   +3 more
europepmc   +1 more source

False positives in gravitational wave campaigns: the electromagnetic perspective. [PDF]

Philos Trans A Math Phys Eng Sci
Oates S.
europepmc   +1 more source