Results 121 to 130 of about 10,729 (219)
The observation of possible reconnection events in the boundary changes of solar coronal holes [PDF]
Coronal holes are large scale regions of magnetically open fields which are easily observed in solar soft X-ray images. The boundaries of coronal holes are separatrices between large scale regions of open and closed magnetic fields where one might expect
Kahler, S. W., Moses, J. Daniel
core +1 more source
CME Interaction with Coronal Holes and Their Interplanetary Consequences [PDF]
, 2008 A significant number of interplanetary (IP) shocks (-17%) during cycle 23 were not followed by drivers. The number of such "driverless" shocks steadily increased with the solar cycle with 15%, 33%, and 52% occurring in the rise, maximum, and declining ...
Akiyama, S. +4 more
core +1 more source
Solar jet-coronal hole collision and a related coronal mass ejection
, 2016 Jets are defined as impulsive, well-collimated upflows, occurring in different layers of the solar atmosphere with different scales. Their relationship with coronal mass ejections (CMEs), another type of solar impulsive events, remains elusive. Using the high-quality imaging data of AIA/SDO, here we show a well-observed coronal jet event, in which part
Zheng, Ruisheng +3 more
openaire +2 more sources
Simulation of Thermal Nonequilibrium Cycles in the Solar Wind
The Astrophysical JournalThermal nonequilibrium (TNE) is a condition of the plasma in the solar corona in which the local rate of energy loss due to radiation increases to the point that it cannot be sustained by the various heating terms acting on the plasma, precluding the ...
Roger B. Scott +3 more
doaj +1 more source
, 2008 This booklet includes 31 problems that involve a variety of math skills, including scientific notation, simple algebra, and calculus. Topics covered include black holes, ice on mercury, a mathematical model of the solar interior, sunspots, the heliopause,
Sten Odenwald
core
Investigating the Behavior and Spatiotemporal Variations of Green-line Emission in the Solar Corona
The Astrophysical Journal Supplement SeriesUnderstanding coronal structure and dynamics can be facilitated by analyzing green-line emission, which enables the investigation of diverse coronal structures such as coronal loops, streamers, coronal holes, and various eruptions in the solar atmosphere.
Jacob Oloketuyi +8 more
doaj +1 more source
Solar Coronal Rotation from 1973 to 2017: An Analytical Approach Based on Coronal Hole Areas
The Astrophysical JournalSolar coronal rotation exhibits significant complexity, and its relationship with the 11 yr solar cycle remains poorly understood. Using 597 McIntosh synoptic maps (CR1601–CR2197), we construct the temporal evolution of coronal rotation by performing ...
Zhijun Zhao +5 more
doaj +1 more source
Predicting the Solar Wind Speed and Interplanetary Sector Structure during Solar Cycles 21–25
The Astrophysical JournalWe use potential-field source-surface (PFSS) extrapolations of photospheric field data to predict the solar wind speed and interplanetary sector structure at Earth during solar cycles 21–25, and compare the results with in situ measurements.
Y.-M. Wang, N. R. Sheeley Jr.
doaj +1 more source
The Astrophysical Journal LettersThe Parker Solar Probe's discovery that magnetic switchbacks and velocity spikes in the young solar wind are abundant has prompted intensive research into their origin(s) and formation mechanism(s) in the solar atmosphere.
Chuanpeng Hou +30 more
doaj +1 more source
Magnetic Connectivity in the Time-dependent Corona and Heliosphere
The Astrophysical Journal LettersMagnetic flux fills the heliosphere, expands outward from the solar corona, and is fundamentally related to the structure and dynamics of the solar corona and solar wind.
Roberto Lionello +5 more
doaj +1 more source