Results 31 to 40 of about 10,692 (216)
Recurrent geomagnetic storms and relativistic electron enhancements in the outer magnetosphere: ISTP coordinated measurements [PDF]
, 1997 New, coordinated measurements from the International Solar-Terrestrial Physics (ISTP) constellation of spacecraft are presented to show the causes and effects of recurrent geomagnetic activity during recent solar minimum conditions.
Allen, J. H. +11 more
core +2 more sources
From Coronal Holes to Pulsars and Back Again: Learning the Importance of Data
Frontiers in Astronomy and Space Sciences, 2022 Although wanting to become an astronomer from an early age, I ended up in solar physics purely by chance, after first working in high-energy astrophysics.
Y.-M. Wang
doaj +1 more source
Structure and Dynamics of the Sun's Open Magnetic Field
, 2007 The solar magnetic field is the primary agent that drives solar activity and couples the Sun to the Heliosphere. Although the details of this coupling depend on the quantitative properties of the field, many important aspects of the corona - solar wind ...
Antiochos S. K. +18 more
core +1 more source
The Astrophysical Journal Supplement Series, 2023 In this paper, we employ a Harten–Lax–van Leer (HLL) generalized Riemann problem (HLL-GRP) solver within the framework of a finite volume method to model 3D solar coronal structures for the first time.
Mengqing Liu +3 more
doaj +1 more source
Solar-Terrestrial Physics, 2023 We have used data from the space telescope SOHO/EIT and the spectrometer VEIS on the Wind spacecraft to compare the solar wind (SW) speed near Earth's orbit with changes in the area of polar coronal holes (CHs) on the Sun during the 1996 solar activity ...
Borisenko A. V., Bogachev S. A.
doaj +1 more source
Coronal Holes and the Solar Wind [PDF]
Highlights of Astronomy, 1992 Around the turn of the century Professor Kristian Birkeland at the University of Kristiania (Oslo) carried out laboratory studies of the emission of charged particles from the Sun and their interaction with comets and magnetized planets. He found that cathode rays emitted by a magnetized sphere are bent toward the equator along trajectories similar to ...
openaire +1 more source
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
The Astrophysical Journal, 1991 It has been shown that the coronal hole, and the associated high-speed stream in the solar wind, are powered by a heat input of the order of 500,000 ergs/sq cm s, with most of the heat injected in the first 1-2 solar radii, and perhaps 100,000 ergs/sq cm s introduced at distances of several solar radii to provide the high speed of the issuing solar ...
openaire +1 more source
Solar wind from the coronal hole boundaries [PDF]
Journal of Geophysical Research: Space Physics, 2005 Recent studies using in situ observations established that the interface between fast and slow wind in interplanetary space has two distinct parts: a smoothly varying boundary layer flow that flanks fast wind from coronal holes and a sharper plasma discontinuity between intermediate and slow solar wind.
N. A. Schwadron +5 more
openaire +1 more source
Impact of Solar Irradiance on Storm‐Time Thermospheric Mass Density Response
Geophysical Research Letters, Volume 53, Issue 6, -Not available-.Abstract As a key parameter in the externally forced ionosphere–thermosphere (IT) system, mass density response to storms is affected by the prevailing solar irradiance. To better understand this relationship, we examine mass density responses to the same storm but with different background solar irradiance levels.
Simin Zhang +5 more
wiley +1 more source