Results 41 to 50 of about 1,919 (235)
X-RAY VARIABILITY AND THE INNER REGION IN ACTIVE GALACTIC NUCLEI [PDF]
The Astrophysical Journal, 2014 32 pages, 11 figures (9 sub-figures); 4 Tables; 1 appendix; published in the Astrophysical ...
P. Mohan, A. Mangalam
openaire +4 more sources
The Astrophysical JournalA core sample of 59 unobscured type 1 active galactic nuclei (AGNs) with simultaneous XMM-Newton X-ray and UV observations is compiled from the archives to probe the nature of soft X-ray excess (SE).
Shi-Jiang Chen +7 more
doaj +1 more source
A High Fraction of Heavily X-Ray-obscured Active Galactic Nuclei
The Astrophysical Journal, 2023 We present new estimates on the fraction of heavily X-ray-obscured, Compton-thick (CT) active galactic nuclei (AGNs) out to a redshift of z ≤ 0.8. From a sample of 540 AGNs selected by mid-infrared (MIR) properties in observed X-ray survey fields, we ...
Christopher M. Carroll +7 more
doaj +1 more source
X-ray variability of 104 active galactic nuclei [PDF]
Proceedings of the International Astronomical Union, 2012 AbstractWe have performed a uniform analysis of the power spectrum densities (PSDs) of 104 nearby (z<0.4) active galactic nuclei (AGN) using 209 XMM-Newton/pn observations, including several AGN classes. These PSDs span ≃ 3 decades in temporal frequencies, ranging from minutes to days.
O. González-Martín, Simon Vaughan
openaire +2 more sources
Advanced Engineering Materials, EarlyView.Mesoporous bioactive glass nanoparticles (MBGNs) are investigated for bone regeneration given their remarkable structural and functional properties. MBGNs are functionalized with Mn and Cu and incorporated with quercetin, a natural flavonoid exhibiting antioxidant, anti‐inflammatory, and antimicrobial properties.
Giovanni Lo Bello +5 more
wiley +1 more source
The Astrophysical JournalWe conduct precise measurements of active galactic nucleus (AGN) clustering at z ∼ 1 and z ∼ 2 by measuring the two-point cross-correlation function (CCF) between galaxies and X-ray-selected AGNs, and the two-point autocorrelation function (ACF) of ...
Hiroyuki Ikeda +8 more
doaj +1 more source
X-ray Reverberation Observational Modelling in Active Galactic Nuclei [PDF]
Proceedings of Accretion Processes in Cosmic Sources – II — PoS(APCS2018), 2019 X-ray reverberation in Active Galactic Nuclei, believed to be the result of the reprocessing of coronal photons by the underlying accretion disc, has allowed us to probe the properties of the inner-most regions of the accretion flow and the central black hole. Our current model (KYNREFREV) computes the time-dependent reflection spectra of the disc as a
V. Karasa +4 more
openaire +3 more sources
Fast Neutron Detector Based on Hybrid 2D Perovskite Thin Films
Advanced Functional Materials, EarlyView.This work presents the direct detection of fast neutrons using flexible hybrid 2D perovskite (PEA2PbBr4) thin‐film detectors. Thanks to their high low‐Z elements content and good charge transport, these materials enable efficient neutron detection. The thin film configuration allowed the operation at low voltage, and offer scalability, flexibility, and
Ilaria Fratelli +11 more
wiley +1 more source
A Simple Method for Predicting N H Variability in Active Galactic Nuclei
The Astrophysical Journal, 2023 The unified model of active galactic nuclei (AGNs) includes a geometrically thick obscuring medium to explain the differences between type I and type II AGNs as an effect of inclination angle.
Isaiah S. Cox +6 more
doaj +1 more source
Realization of Complex‐Shaped Magnetic Nanotubes with 3D Printing and Electrodeposition
Advanced Functional Materials, EarlyView.Complex‐shaped magnetic nanotubes were fabricated by coating three‐dimensional nanoscaffolds fabricated with focused electron beam induced deposition with a magnetic coating via electrodeposition. X‐ray magnetic microscopy and simulations revealed an azimuthal magnetic configuration within the nanotubes and pinning of domain walls at curved vertices ...
Claudia Fernández‐González +15 more
wiley +1 more source