Results 51 to 60 of about 1,130 (187)
Ultra‐Low‐L Sub‐MeV Electron Microbursts During the May 2024 Super Storm
Geophysical Research Letters, Volume 53, Issue 14, 28 July 2026.Abstract During the May 2024 super storm, we identified sub‐second microburst‐type relativistic electron precipitation events at McIlwain's L∼2 $L\sim 2$ in low‐Earth orbit using the Gamma‐ray Burst Monitor (CGBM) onboard the CALorimetric Electron Telescope on the International Space Station.
Miki Kurihara +16 more
wiley +1 more source
X-ray Observations of Active Galactic Nuclei in the Cosmological Context
Astrophysics and Space Science, 1998 Partial financial support for this work was provided by the DGESID under project PB95-0122. ACF thanks the Royal Society for support.
Barcons, Xavier +6 more
openaire +2 more sources
Recent Progress and Future Prospects of LWIR T2SL InAs/GaSb Detectors on GaAs
Advanced Photonics Research, Volume 7, Issue 7, July 2026.InAs/GaSb LWIR type‐II superlattices (T2SLs) on GaAs substrates are cost‐effective and offer higher yield. However, due to a relatively large lattice mismatch, a high density of threading dislocations is created, which is detrimental to device performance.
Paradeisa E. O’Dowd Phanis +5 more
wiley +1 more source
Investigating Model Dependencies for Obscured Active Galactic Nuclei: A Case Study of NGC 3982
The Astrophysical JournalX-ray spectroscopy of heavily obscured active galactic nuclei (AGN) offers a unique opportunity to study the circumnuclear environment of accreting supermassive black holes.
Kristína Kallová +2 more
doaj +1 more source
Advanced Science, Volume 13, Issue 38, 9 July 2026.A real‐time, non‐contact photoplethysmography (PPG) system based on InAs colloidal quantum dots (CQDs) synthesized via a seedless injection synthesis is demonstrated. The measured oxygen saturation shows considerable agreement with commercial PPG devices.
Beom Kwan Kim +8 more
wiley +1 more source
Chandra Follow-up Observations of Swift-BAT-selected AGNs III
The Astrophysical JournalThe cosmic X-ray background (CXB) is dominated by the obscured and unobscured coronal light of active galactic nuclei (AGN). At energies below 10 keV, the CXB can be well explained by models taking into account the known AGN and the observed distribution
Isaiah S. Cox +7 more
doaj +1 more source
Advanced Science, Volume 13, Issue 37, 3 July 2026.Inspired by natural amino acid polymer‐melanin systems, this study strategically incorporated tellurocysteine to develop advanced radiation‐shielding materials. This approach transformed the primary interaction mechanism between melanin‐based materials and incident photons from Compton scattering to the photoelectric effect. Tellurocysteine‐polymerized
Wei Chen +6 more
wiley +1 more source
X-Ray Spectra and Time Variability of Active Galactic Nuclei [PDF]
Annual Review of Astronomy and Astrophysics, 1984 The X-ray spectra of broad line active galactic nuclei (AGN) of all types (Seyfert I's, NELG's, broadline radio galaxies) are well fit by a power law in the .5 to 100 keV band of man energy slope alpha = .68 + or - .15. There is, as yet, no strong evidence for time variability of this slope in a given object.
openaire +1 more source
Testing Physical and Phenomenological Models to Explain the Origin of the Soft Excess in Type-1 AGN
The Astrophysical JournalActive galactic nuclei (AGN) exhibit an excess of X-ray emission below ∼1 keV compared to the 2–10 keV continuum extrapolation. This feature is commonly named soft excess, and its origin is currently debated for type-1 AGN.
César Ivan Victoria-Ceballos +5 more
doaj +1 more source
Geochemistry, Geophysics, Geosystems, Volume 27, Issue 7, July 2026.Abstract The 2021–2022 Fukushima‐Oki earthquakes in northeastern Japan provide a valuable opportunity to deepen our understanding of intraslab earthquakes generated by the reactivation of subducted outer‐rise bending faults. This study integrates high‐resolution seismic velocity models with numerical modeling results to investigate the roles of slab ...
Yuyang Tan +7 more
wiley +1 more source