Results 141 to 150 of about 67,060 (301)

Searching for Rotational X‐Ray Modulation on TIC 277539431

Astronomische Nachrichten, Volume 347, Issue 3, March 2026.
ABSTRACT TIC 277539431, a fast rotating M7 dwarf, was detected to host the highest latitude flare to date at 81°$$ {81}^{{}^{\circ}} $$. Magnetic activity like stellar flares occurring at high latitude indicate occurrence of coronal loops at these latitudes on fully‐convective M dwarfs. In contrast, sunspots usually occur below 30°$$ {30}^{{}^{\circ}} $
Desmond Dsouza, Katja Poppenhäger, Ekaterina Ilin   +2 more
wiley   +1 more source

Effect of Preheating on Phase Distribution and Orientation of 2D Halide Perovskite for Indoor Photovoltaics

Energy Technology, Volume 14, Issue 3, March 2026.
The BA2MA3Pb4I13, where (BA is butylammonium, MA is methylammonium) quasi‐2D halide perovskites are identified as a promising material with a suitable bandgap of 1.9 eV for indoor light harvesting. A combination of lower thickness of 260 nm, better phase purity and greater (202) crystal orientation obtained from preheating, yielded a champion power ...
Aveena Abee Varghese, Junyi Gong, Nirmal Prashanth Maria Joseph Raj, Graham A Turnbull, Lethy Krishnan Jagadamma   +4 more
wiley   +1 more source

Dynamic Retinal Pathology in Glaucoma Progression Revealed by High‐Resolution Functional Imaging In Vivo

Laser &Photonics Reviews, Volume 20, Issue 5, 6 March 2026.
In this work, we investigated the dynamic retinal pathology of glaucoma from onset to late stages through longitudinal in vivo high‐resolution imaging in a silicone oil‐induced ocular hypertension (SOHU) glaucoma mouse model. We developed an optimized adaptive optics two‐photon excitation fluorescence microscopy (AO‐TPEFM) technique for morphological ...
Yiming Fu, Pham Binh Minh, Sicong He, Yingzhu He, Zhongya Qin, Ting Xie, Jianan Qu   +6 more
wiley   +1 more source

Lyα Emission from K and M Dwarfs: Intrinsic Profiles, Variability, and Flux in the Habitable Zone

The Astrophysical Journal
Lyman-alpha (Ly α ) is the most prominent ultraviolet (UV) emission line in low-mass stars, playing a crucial role in exoplanet atmospheric photochemistry, heating, and escape.
Sarah Peacock, Travis S. Barman, R. O. Parke Loyd, Adam C. Schneider, Allison Youngblood, Kenneth G. Carpenter, Evgenya L. Shkolnik   +6 more
doaj   +1 more source

Quantifying uncertainty in calibration and clinical application of EBT‐4 Gafchromic film dosimetry

Medical Physics, Volume 53, Issue 3, March 2026.
Abstract Background GAFchromic films (GAFs) are essential tools in radiotherapy dosimetry, but uncertainties in calibration methods limit their accuracy and hinder consistency across clinical practice. Purpose This study aimed to perform a comparative analysis of different calibration functions for GAFchromic EBT4 films in single‐ and double‐channel ...
Riccardo Lombardi, Nicola Zancopè, Samuele Cavinato, Nicole De Zordi, Angelo Giannone, Alessandro Scaggion, Marta Paiusco   +6 more
wiley   +1 more source

Influence of radiotherapy dose rate on gold nanoparticle‐induced radiosensitization from high dose‐rate brachytherapy and external beam therapy

Medical Physics, Volume 53, Issue 3, March 2026.
Abstract Background Associated normal tissue toxicity from current radiotherapy (RT) treatments limits effective dose escalation in the tumor to achieve nominal treatment results. Gold nanoparticles (GNPs) as radiosensitizing agents to locally increase photoelectron production have gained interest as a safe and viable method to improve therapeutic ...
Daniel Cecchi, Nolan Jackson, Sacha Freeman, Kieren O'Neil, Mehran Goharian, Wayne Beckham, Devika B. Chithrani   +6 more
wiley   +1 more source

Improved Astrophysical and Computational Oscillator Strengths for Ultraviolet P ii Lines

The Astrophysical Journal
Abundance measurements for the volatile element phosphorus are important for measuring the metallicity in interstellar and circumgalactic gas, where their accuracies are limited by uncertainties in the oscillator strengths.
Frances H. Cashman, Romas Kisielius, Varsha P. Kulkarni, Rasa Karpuškienė, Fatima Elkhatib   +4 more
doaj   +1 more source

A simulation of the instrument pointing system for the Astro-1 mission [PDF]

NASA has recently completed a shuttle-borne stellar ultraviolet astronomy mission known as Astro-1. A three axis instrument pointing system (IPS) was employed to accurately point the science instruments.
Rakoczy, J., West, M., Whorton, M.
core   +1 more source

Quasinormal Modes for Coherent Quantum Black Holes

Fortschritte der Physik, Volume 74, Issue 3, March 2026.
ABSTRACT Coherent quantum black holes are quantum geometries obtained by means of a mean‐field‐like approach to the gravitational interaction. This procedure attenuates the classical spacetime singularities of general relativity by replacing them with integrable singularities in the quantum‐corrected geometry. After discussing some relevant observables
Tommaso Antonelli, Andrea Giusti, Roberto Casadio, Lavinia Heisenberg   +3 more
wiley   +1 more source

Glancing Incidence Optics for X-Ray and Ultraviolet Astronomy [PDF]

, 1971
J. H. Underwood, W. M. Neupert, Richard B. Hoover   +2 more
openalex   +1 more source