Results 61 to 70 of about 860 (182)
Atmospheric Heating Events Associated with Fine-scale Flux Emergence in Ephemeral Regions
The Astrophysical JournalCoronal heating has puzzled solar physicists for decades. The question of why the Sun’s upper atmosphere is significantly hotter than its lower atmosphere remains a key mystery.
Hanlin Yang, Jingxiu Wang, Chunlan Jin
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New Evidence that Magnetoconvection Drives Solar–Stellar Coronal Heating
The Astrophysical Journal Letters, 2017 Abstract How magnetic energy is injected and released in the solar corona, keeping it heated to several million degrees, remains elusive. Coronal heating generally increases with increasing magnetic field strength. From a comparison of a nonlinear force-free model of the three-dimensional active region coronal field to observed extreme ...
Sanjiv K. Tiwari +4 more
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The New Geomagnetic Monitoring Network in China: Insights From the 2024 Mother's Day Superstorm
Space Weather, Volume 24, Issue 2, February 2026.Abstract China has established a ground‐based network system, that is the Chinese Meridian Project (CMP), to continuously monitor the geomagnetic field. The superstorm in May 2024 was analyzed using the CMP data. The negative peak of the horizontal geomagnetic field (Bh) during the storm main phase at different CMP stations varied between −449 nT and ...
Jing Wang +12 more
wiley +1 more source
Modeling the Propagation of Slow Magnetoacoustic Waves in a Multistranded Coronal Loop
The Astrophysical JournalWe study the propagation properties of slow magnetoacoustic waves in a multithermal coronal loop using a 3D MHD model, for the first time. A bundle of 33 vertical cylinders, each of 100 km radius, randomly distributed over a circular region of radius 1 ...
S. Krishna Prasad, T. Van Doorsselaere
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Coronal Heating versus Solar Wind Acceleration
, 2004 Parker's initial insights from 1958 provided a key causal link between the heating of the solar corona and the acceleration of the solar wind. However, we still do not know what fraction of the solar wind's mass, momentum, and energy flux is driven by Parker-type gas pressure gradients, and what fraction is driven by, e.g., wave-particle interactions ...
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Turbulent resistive heating of solar coronal arches
The Astrophysical Journal, 1983 The possibility that coronal heating occurs by means of anomalous Joule heating by electrostatic ion cyclotron waves is examined, with consideration given to currents running from foot of a loop to the other. It is assumed that self-fields generated by the currents are absent and currents follow the direction of the magnetic field, allowing the plasma ...
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The MANA Magnetometer Array, and Magnetic Observations Across New Zealand From 2024
Space Weather, Volume 24, Issue 2, February 2026.Abstract This paper describes the Magnetometer Array for New Zealand Aotearoa, or MANA, completed in 2023. The network consists of five new variometer sites to complement the existing Eyrewell geomagnetic observatory. Here, we describe the technical details and capabilities of the network, including the hardware and software used. Data products include
John Malone‐Leigh +8 more
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3D MHD Simulations of Coronal Loops Heated via Magnetic Braiding. I. Continuous Driving
The Astrophysical JournalThe nature and detailed properties of the heating of the million-degree solar corona are important issues that are still largely unresolved. Nanoflare heating might be dominant in active regions and quiet Sun, although direct signatures of such small ...
G. Cozzo +15 more
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Solar Coronal Heating by Gravity-Induced Resonant Emission
, 2019 Solar Coronal Heating is a Nonlinear Quantum Mechanical Phenomenon. Corona is a powerful source of X-rays and ionisations & emissions of such radiations are quantum mechanical and levels are highly unstable to order of femto-seconds. A linear method of energy transfer like collisional ionisation to such levels is practically not feasible.
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High‐Latitude Electrodynamics and Thermospheric Density Variations During the 2024 Gannon Storm
Space Weather, Volume 24, Issue 2, February 2026.Abstract This study investigates high‐latitude electrodynamics and thermospheric density variations during the 2024 Gannon's storm. First, the auroral precipitation module of Auroral Spectra and High‐Latitude Electric field variabilitY, ASHLEY‐A, is improved to more accurately capture the location of auroral precipitation observed during this ...
Qingyu Zhu +6 more
wiley +1 more source