Results 81 to 90 of about 3,680 (199)

Red Asymmetry of H α Line Profiles during the Flares on the Active RS CVn-type Star II Pegasi

The Astrophysical Journal
Stellar coronal mass ejections (CMEs) have recently attracted much attention for their impacts on stellar evolution and surrounding exoplanets. RS CVn-type stars could produce large flares, and therefore may have frequent CMEs. Here we report the capture
Dongtao Cao, Shenghong Gu
doaj   +1 more source

The Sun in Time: Age, Rotation, and Magnetic Activity of the Sun and Solar-type Stars and Effects on Hosted Planets

, 2009
Multi-wavelength studies of solar analogs (G0-5 V stars) with ages from ~50 Myr to 9 Gyr have been carried out as part of the "Sun in Time" program for nearly 20 yrs.
Edward F. Guinan, Feltzing, Grießmeier, Kulikov, Messina, Scott G. Engle   +5 more
core   +1 more source

Validation of Intravoxel Incoherent Motion MRI Using Perfused Explanted Human Livers

Magnetic Resonance in Medicine, Volume 95, Issue 4, Page 2291-2304, April 2026.
ABSTRACT Purpose Evaluate the feasibility of using perfused explanted human livers for validating intravoxel incoherent motion (IVIM). Methods Eight (n = 8) explanted livers from deceased donors were obtained. The portal vein and hepatic artery of each explanted liver were connected to a perfusion system.
Gregory Simchick, James Rice, Leah M. Gober, Daniel Rice, Jennifer Philip, Alejandro Roldan‐Alzate, Diego Hernando   +6 more
wiley   +1 more source

Simulations of Coronal Mass Ejections on a Young Solar-type Star and Their Detectability Through Coronal Spectral Observations

The Astrophysical Journal
There is a growing interest in searching for coronal mass ejections (CMEs) in other stellar systems, because they are thought to be one of the important factors shaping planetary atmospheres.
Yu Xu, Hui Tian, Julián D. Alvarado-Gómez, Jeremy J. Drake, Gustavo Guerrero   +4 more
doaj   +1 more source

Dawn‐Side Anomaly in Sudden Geomagnetic Field Responses to Solar Wind Pressure Discontinuities During the 10 May and 10 October 2024 Geomagnetic Storms

Geophysical Research Letters, Volume 53, Issue 3, 16 February 2026.
Abstract Interactions of solar wind dynamic pressure (SWDP) discontinuities with Earth's magnetosphere cause geomagnetic Sudden Commencements (SCs). Typically, positive/negative SCs occur at low latitudes due to enhancements/reductions in SWDP.
Deeksha Rai, S. Tulasi Ram, B. Nilam, D. M. Oliveira, B. Remya, Anil Raghav, D. Chakrabarty, Abhishek Kumar, Shivam Parashar, Vipin K. Yadav, A. P. Dimri   +10 more
wiley   +1 more source

Simple Model for Temporal Variations of Hα Spectrum by an Eruptive Filament from a Superflare on a Solar-type Star

The Astrophysical Journal
Flares are intense explosions on the solar and stellar surfaces, and solar flares are sometimes accompanied by filament or prominence eruptions. Recently, a large filament eruption associated with a superflare on a solar-type star EK Dra was discovered ...
Kai Ikuta, Kazunari Shibata
doaj   +1 more source

Ionosphere‐Thermosphere Coupling in the Northern Polar Region During the May 2024 Geomagnetic Superstorm

Journal of Geophysical Research: Space Physics, Volume 131, Issue 2, February 2026.
Abstract The May 2024 superstorm, as the most intense geomagnetic storm since 2003, caused a variety of disturbances in the magnetosphere‐ionosphere‐thermosphere system. This study investigates the long‐lasting electron density depletion in the polar region and the underlying ionosphere‐thermosphere coupling, based on a comprehensive set of ...
Lei Cai, Anita Aikio, G. P. Geethakumari, Heikki Vanhamäki, I. I. Virtanen, Shin‐ichiro Oyama, Yongliang Zhang, Jiaojiao Zhang, Marc Hairston   +8 more
wiley   +1 more source

Simulated Coronal Mass Ejections on a Young Solar-type Star and the Associated Instantaneous Angular Momentum Loss

The Astrophysical Journal
Coronal mass ejections (CMEs) on stars can change the stars’ magnetic field configurations and mass-loss rates during the eruption and propagation and therefore, may affect the stars’ rotation properties on long timescales.
Yu Xu, Julián D. Alvarado-Gómez, Hui Tian, Katja Poppenhäger, Gustavo Guerrero, Xianyu Liu   +5 more
doaj   +1 more source

Sustainable bioceramics, biopolymers, and composites for bone applications: From bench to production

International Journal of Applied Ceramic Technology, Volume 23, Issue 1, February 2026.
Abstract In response to environmental challenges and primary resource scarcity, sustainable approaches that rely on recycling and reusing waste materials are becoming highly valuable and appealing options in modern society. These strategies have started being applied in biomaterials science, too, leading to the advent of new synergies between ...
Bohan Zhang, Francesco Baino
wiley   +1 more source

Rebuilding the Frankfurt School's Bridge From Theory to Practice: Jürgen Habermas's Rehabilitation of Critical Theory

Constellations, EarlyView.
Peter J. Verovšek
wiley   +1 more source