Results 51 to 60 of about 434,940 (199)

The Lower Solar Atmosphere

open access: yes, 1998
This “rapporteur” report discusses the solar photosphere and low chromosphere in the context of chemical composition studies. The highly dynamical nature of the photosphere does not seem to jeopardize precise determination of solar abundances in classical fashion.
openaire   +2 more sources

Intensity enhancement of O VI ultraviolet emission lines in solar spectra due to opacity

open access: yes, 2014
Opacity is a property of many plasmas, and it is normally expected that if an emission line in a plasma becomes optically thick, its intensity ratio to that of another transition that remains optically thin should decrease.
Bowler, L. A.   +7 more
core   +1 more source

Diagnosis of the solar atmosphere using solar oscillations [PDF]

open access: yesSymposium - International Astronomical Union, 1988
I present a review of the art of using acoustic and gravity waves as a tool to probe the structure of the solar atmosphere. The principle ideas behind the technique are discussed and a small bouquet of results is presented. The current discrepancies are pointed out, and in the last section a few thoughts are let loose about the inversion of data to ...
openaire   +1 more source

Magneto-seismology of solar atmospheric loops by means of longitudinal oscillations

open access: yes, 2012
There is increasingly strong observational evidence that slow magnetoacoustic modes arise in the solar atmosphere. Solar magneto-seismology is a novel tool to derive otherwise directly un-measurable properties of the solar atmosphere when ...
Dymova   +4 more
core   +1 more source

Atmospheric Electrification in the Solar System [PDF]

open access: yesSurveys in Geophysics, 2006
Atmospheric electrification is not a purely terrestrial phenomenon: all Solar System planetary atmospheres become slightly electrified by cosmic ray ionisation. There is evidence for lightning on Jupiter, Saturn, Uranus and Neptune, and it appears likely to exist on Mars, Venus and Titan.
openaire   +3 more sources

Vortex Flows in the Solar Chromosphere -- I. Automatic detection method

open access: yes, 2017
Solar "magnetic tornadoes" are produced by rotating magnetic field structures that extend from the upper convection zone and the photosphere to the corona of the Sun.
Kato, Yoshiaki, Wedemeyer, Sven
core   +1 more source

Oscillations of solar atmosphere neutrinos [PDF]

open access: yes, 2006
The Sun is a source of high energy neutrinos (E > 10 GeV) produced by cosmic ray interactions in the solar atmosphere. We study the impact of three-flavor oscillations (in vacuum and in matter) on solar atmosphere neutrinos, and calculate their ...
A. Mirizzi   +10 more
core   +2 more sources

Revisiting the Solar Wind Deceleration Upstream of the Martian Bow Shock Based on MAVEN Observations

open access: yesThe Astrophysical Journal
The solar wind deceleration upstream of the Martian bow shock is examined using particle and magnetic field measurements obtained by the Mars Atmosphere and Volatile EvolutioN (MAVEN).
Yuqi Liu   +8 more
doaj   +1 more source

Atmospheric attenuation of solar radiation [PDF]

open access: yes, 1977
The attenuation of solar radiation by the atmosphere between the heliostat and receiver of a Central Receiver solar energy system has been computed for a number of atmospheric conditions and tower-heliostat distances. The most important atmospheric variable is found to be the atmospheric aerosol content.
openaire   +4 more sources

Editorial: Connecting solar flows and fields to understand surface magnetism

open access: yesFrontiers in Astronomy and Space Sciences, 2023
Kiran Jain   +2 more
doaj   +1 more source

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