Results 61 to 70 of about 1,455,996 (195)
The Astrophysical Journal, 2023 Models fail to reproduce observations of the coldest parts of the Sun’s atmosphere, where interactions between multiple ionized and neutral species prevent an accurate MHD representation.
Samuel Evans +4 more
doaj +1 more source
Reconstructing Historical Solar Indices for Predicting Past Space Weather Events
Space Weather, Volume 24, Issue 4, April 2026.Abstract Modeling and forecasting the near‐Earth space environment, specifically the thermosphere, is particularly important because it affects the motion of low‐Earth orbit objects through atmospheric drag. Solar indices such as F10.7, S10.7, M10.7, and Y10.7 are commonly used as inputs to ionospheric and thermospheric density models.
Poshan Belbase +4 more
wiley +1 more source
Integrating Solar Heating into an Air Handling Unit to Minimize Energy Consumption [PDF]
, 2010 The purpose of this project was to test a method of integrating solar heating with a small commercial air handling unit (AHU). In order to accomplish this a heat exchanger was placed in the reheat position of the AHU and piped to the solar heating ...
Wilson, Scott A
core +1 more source
Kink Instability of Flux Ropes in Partially Ionized Plasmas
The Astrophysical JournalIn the solar atmosphere, flux ropes are subject to current-driven instabilities that are crucial in driving plasma eruptions, ejections, and heating. A typical ideal magnetohydrodynamics instability developing in flux ropes is the helical kink, which ...
Giulia Murtas, Andrew Hillier, Ben Snow
doaj +1 more source
Journal of Geophysical Research: Space Physics, Volume 131, Issue 2, February 2026.Abstract Solar superflares of S‐class (>X10 in soft X‐rays) pose extreme space weather hazards, yet their prediction remains a fundamental challenge owing to their rapid and transient natures and the limitations of conventional event‐based forecasts. We introduce for the first time, a probabilistic spatiotemporal framework designed to identify extended
V. M. Velasco Herrera +12 more
wiley +1 more source
Investigating Alfvénic wave propagation in coronal open-field regions [PDF]
, 2015 The physical mechanisms behind accelerating solar and stellar winds are a long-standing astrophysical mystery, although recent breakthroughs have come from models invoking the turbulent dissipation of Alfvén waves.
Morton, Richard +2 more
core +1 more source
Multiline Spectropolarimetric Observation of Flare Ribbon Fine Structures with ViSP/DKIST
The Astrophysical JournalWe present an analysis of flare ribbon fine structure observed during a GOES C2-class flare using high spatial and spectral resolution multiline spectropolarimetric observations from the ViSP instrument at the DKIST. The ViSP recorded full Stokes spectra
Rahul Yadav +5 more
doaj +1 more source
Journal of Geophysical Research: Space Physics, Volume 130, Issue 10, October 2025.Abstract During a solar flare, the fluxes in various lines and continua of the solar spectrum increase, leading to enhanced ionization of the illuminated part of the Earth's ionosphere and an increase in the total electron content (TEC $TEC$). It has been previously shown that nearly 50% of X‐class solar flares exhibit a second peak in warm coronal ...
S. Z. Bekker +2 more
wiley +1 more source
The Astrophysical JournalWe introduce an improved and fast inversion tool that is able to provide the thermodynamics of the solar atmosphere from the photosphere to the top of the chromosphere, as well as the integrated radiative losses (IRLs) in the chromosphere for data ...
Alberto Sainz Dalda +4 more
doaj +1 more source
Coronal Heating and Solar Wind Generation by Flux Cancellation Reconnection
The Astrophysical Journal, 2023 In this paper, we propose that flux cancellation on small granular scales (≲1000 km) ubiquitously drives reconnection at a multitude of sites in the low solar atmosphere, contributing to chromospheric/coronal heating and the generation of the solar wind.
D. I. Pontin +3 more
doaj +1 more source