Results 21 to 30 of about 280,119 (256)
The Astrophysical Journal, 2009 Here, we explore the nature of small-scale jet-like structures and their possible relation to explosive events and other known transient features, like spicules and macrospicules, using high-resolution spectroscopy obtained with the Solar and Heliospheric Observatory/Solar Ultraviolet Measurements of Emitted Radiation instrument.
Scullion, E. +4 more
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The Fine-scale Structure of Polar Coronal Holes
The Astrophysical Journal, 2023 Coronal holes are thought to be composed of relatively broad columnar structures known as plumes. Here, we demonstrate that the plumes (and interplumes) in polar coronal holes are composed of fine-scale filamentary structure, with average scales of 2″–10″
R. J. Morton, R. Cunningham
doaj +1 more source
DIPOLAR EVOLUTION IN A CORONAL HOLE REGION [PDF]
The Astrophysical Journal, 2009 Using observations from the SOHO, STEREO and Hinode, we investigate magnetic field evolution in an equatorial coronal hole region. Two dipoles emerge one by one. The negative element of the first dipole disappears due to the interaction with the positive element of the second dipole. During this process, a jet and a plasma eruption are observed.
Yang, S., Zhang, J., Borrero, J.
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MHD simulations of coronal heating [PDF]
, 2015 The problem of heating the solar corona requires the conversion of magnetic energy into thermal energy. Presently, there are two promising mechanisms for heating the solar corona: wave heating and nanoflare heating.
Tam, Kuan V.
core +2 more sources
Coronal holes and solar-terrestrial relationships
Geofísica Internacional, 1991 En este trabajo se discute el papel que juegan los hoyos coronales del Sol en las perturbaciones del viento solar y en las alteraciones del ambiente terrestre.
S. Bravo
doaj +1 more source
A Technique for Patellar Tendon Repair Using a Suture-Free Nonwoven Polyethylene Terephthalate Implant. [PDF]
Arthrosc TechAbstract Surgical repair remains the standard of care for complete patellar tendon ruptures. However, healing is often challenging due to the tendon's poor biological environment and high tensile stress at the repair site. Bioinductive implants have been introduced to enhance tendon healing; however, they often lack early structural reinforcement. This
Mayer MA +4 more
europepmc +2 more sources
Antarctic Record, 1980 This is an attempt to identify the causes of geomagnetic storms which occurred during a year and a half from January 1977 to June 1978. The assignment of geomagnetic storm causation to appropriate coronal holes or solar flares has been made by ...
Katsuhide MARUHASHI, Takahiroo ISHI
doaj +1 more source
Estimating Ion Temperatures at the Polar Coronal Hole Boundary
The Astrophysical Journal, 2023 The temperatures of the heavy ions ( T _i ) in the solar corona provide critical information about the heating mechanism of the million-degree corona.
Yingjie Zhu, Judit Szente, Enrico Landi
doaj +1 more source
Velocity Structure of Jets in a Coronal Hole [PDF]
Publications of the Astronomical Society of Japan, 2007 Abstract The velocity structures of jets in a coronal hole have been derived for the first time. Hinode observations revealed the existence of many bright points in coronal holes. They are loop-shaped and sometimes associated with coronal jets. Spectra obtained with the Extreme-ultraviolet Imaging Spectrometer aboard Hinode were analyzed
Kamio, Suguru +6 more
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The Merging of a Coronal Dimming and the Southern Polar Coronal Hole
The Astrophysical Journal, 2023 Abstract We report on the merging between the southern polar coronal hole and an adjacent coronal dimming induced by a coronal mass ejection on 2022 March 18, resulting in the merged region persisting for at least 72 hr. We use remote sensing data from multiple co-observing spacecraft to understand the physical processes during this ...
Nawin Ngampoopun +6 more
openaire +4 more sources