Results 21 to 30 of about 274,748 (260)
The Astrophysical Journal, 2023 Above ∼3 keV, the X-ray spectrum of active galactic nuclei (AGNs) is characterized by the intrinsic continuum and Compton reflection features. For type-1 AGNs, several regions may contribute to the reflection.
César Ivan Victoria-Ceballos +5 more
doaj +1 more source
The Astrophysical Journal, 2023 To understand the formation and growth of supermassive black holes (SMBHs) and their coevolution with host galaxies, it is essential to know the impact of environment on the activity of active galactic nuclei (AGNs).
Zhensong Hu +16 more
doaj +1 more source
Search for X-ray occultations in active galactic nuclei [PDF]
Monthly Notices of the Royal Astronomical Society, 2014 Accepted for publication in MNRAS. 15 pages, 7 figures. Table 2 not included, will be available in the published version.
G. Torricelli-Ciamponi +4 more
openaire +3 more sources
Scalable Two‐Step Production of High‐Efficiency Perovskite Solar Cells and Modules
Solar RRL, Volume 7, Issue 1, January 2023., 2023 The industrialization of perovskite photovoltaics requires a scalable, fully automatic, low‐cost, and high‐throughput production method to fabricate the perovskite films. This review focuses on the scalable two‐step fabrication of perovskite solar cells and modules.
Zhifang Wu +5 more
wiley +1 more source
The Astrophysical Journal, 2023 1ES1927+654 is a nearby active galactic nucleus (AGN) that has shown an enigmatic outburst in optical/UV followed by X-rays, exhibiting strange variability patterns at timescales of months to years.
Ritesh Ghosh +26 more
doaj +1 more source
Craton Destruction Induced by Drastic Drops in Lithospheric Mantle Viscosity
Earth and Space Science, Volume 9, Issue 12, December 2022., 2022 Abstract The disruption of the mantle roots of cratons is common after cratonization. Craton destruction, which is characterized by severe lithospheric thinning, extensive thrust and extensional deformation, basin filling, and intense thermal activities, is relatively rare and is generally attributed to intensely reduced viscosity contrasts between the
Lu Wang +3 more
wiley +1 more source
X-Ray Variability of Active Galactic Nuclei [PDF]
Highlights of Astronomy, 1983 X-ray variability of active galactic nuclei is commonplace on scales from days to years. It also occurs, although rarely, on time scales as short as 200 seconds. Both these statements must be strongly qualified by the irregularity and insensitivity of the available observations. In the X-rays we expect that we are seeing deep within the active nucleus,
Greg Madejski +2 more
openaire +1 more source
Quantum medical images processing foundations and applications
IET Quantum Communication, Volume 3, Issue 4, Page 201-213, December 2022., 2022 Abstract Medical imaging is considered one of the most important areas within scientific imaging due to the rapid and ongoing development in computer‐aided medical image visualisation, advances in analysis approaches, and computer‐aided diagnosis.
Ahmed Elaraby
wiley +1 more source
The X-Ray Properties of 2MASS Red Active Galactic Nuclei [PDF]
The Astrophysical Journal, 2002 The Two Micron All Sky Survey (2MASS) is finding previously unidentified, luminous red active galactic nuclei (AGN). This new sample has a space density similar to, or greater than, previously known AGN, suggesting that a large fraction of the overall population has been missed. Chandra observations of a well-defined subset of these objects reveal that
Wilkes, Belinda Jane +6 more
openaire +4 more sources
BASS. XXII. The BASS DR2 AGN Catalog and Data
The Astrophysical Journal Supplement Series, 2022 We present the active galactic nucleus (AGN) catalog and optical spectroscopy for the second data release of the Swift BAT AGN Spectroscopic Survey (BASS DR2).
Michael J. Koss +34 more
doaj +1 more source