The Low-Frequency Solar Corona in Circular Polarization
Sign Up to like & getrecommendations! Published in 2019 at "Solar Physics"
DOI: 10.1007/s11207-019-1502-y
Abstract: We present spectropolarimetric imaging observations of the solar corona at low frequencies (80 - 240 MHz) using the Murchison Widefield Array (MWA). These images are the first of their kind, and we introduce an algorithm… read more here.
Keywords: frequency solar; polarization; circular polarization; corona circular ... See more keywords
Long-Term Evolution of the Solar Corona Using PROBA2 Data
Sign Up to like & getrecommendations! Published in 2019 at "Solar Physics"
DOI: 10.1007/s11207-020-01635-x
Abstract: We use The Sun Watcher with Active Pixel System detector and Image Processing (SWAP) imager onboard the Project for Onboard Autonomy 2 (PROBA2) mission to study the evolution of large-scale EUV structures in the solar… read more here.
Keywords: evolution; long term; corona; evolution solar ... See more keywords
Confined pseudo-shocks as an energy source for the active solar corona
Sign Up to like & getrecommendations! Published in 2018 at "Nature Astronomy"
DOI: 10.1038/s41550-018-0590-1
Abstract: The Sun’s active corona requires an energy flux of ~103 W m−2 to compensate for radiative losses and to maintain its high temperature1. Plasma moves in the corona through magnetic loops2,3, which may be connected with the… read more here.
Keywords: pseudo shocks; energy; confined pseudo; corona ... See more keywords
LOFAR observations of radio burst source sizes and scattering in the solar corona
Sign Up to like & getrecommendations! Published in 2020 at "Astronomy and Astrophysics"
DOI: 10.1051/0004-6361/202038518
Abstract: Low frequency radio wave scattering and refraction can have a dramatic effect on the observed size and position of radio sources in the solar corona. The scattering and refraction is thought to be due to… read more here.
Keywords: solar corona; radio; source; source size ... See more keywords
Nonlinear dust ion acoustic shock wave structures in solar F corona region
Sign Up to like & getrecommendations! Published in 2020 at "Physics of Plasmas"
DOI: 10.1063/5.0023283
Abstract: Shock wave formation in dusty plasma consisting of mobile positive and negative ions, nonthermal electrons, and negatively charged static dust particles is theoretically studied in the presence of a magnetic field. Using the reductive perturbation… read more here.
Keywords: corona region; dust; shock wave; solar corona ... See more keywords
The solar corona as an active medium for magnetoacoustic waves
Sign Up to like & getrecommendations! Published in 2021 at "Plasma Physics and Controlled Fusion"
DOI: 10.1088/1361-6587/ac36a5
Abstract: The presence and interplay of continuous cooling and heating processes maintaining the corona of the Sun at the observed one million K temperature were recently understood to have crucial effects on the dynamics and stability… read more here.
Keywords: medium magnetoacoustic; corona active; active medium; heating ... See more keywords
The Nature of Variations in Anomalies of the Chemical Composition of the Solar Corona with the 11-Year Cycle
Sign Up to like & getrecommendations! Published in 2018 at "Astronomy Reports"
DOI: 10.1134/s1063772918040054
Abstract: Evidence that the distribution of the abundances of admixtures with low first-ionization potentials (FIP < 10 eV) in the lower solar corona could be associated with the typology of the largescale magnetic field is presented.… read more here.
Keywords: nature variations; cycle; fip effect; variations anomalies ... See more keywords
A possible reference to the solar corona in a contemporary report of the AD1239 eclipse
Sign Up to like & getrecommendations! Published in 2022 at "Journal for the History of Astronomy"
DOI: 10.1177/00218286221125189
Abstract: The codex kept at the Arnamagnean Institute, in Copenhagen, with the number 805 4º (København, Det Arnamagnaeanske Institut, Københavns Universitet, AM 805 4º), contains a combination of texts featuring legal and short historiographic pieces. In… read more here.
Keywords: solar corona; reference; report; possible reference ... See more keywords
Polarization neutral point pairs of the solar corona and the lunar disc observed during the total solar eclipse on 11 August 1999 in Hungary.
Sign Up to like & getrecommendations! Published in 2021 at "Applied optics"
DOI: 10.1364/ao.421177
Abstract: During the total solar eclipses on 11 August 1999 in Kecel (Hungary) and on 29 March 2006 in Side (Turkey), two Hungarian groups performed full-sky imaging polarimetric measurements of the eclipsed sky. They observed the… read more here.
Keywords: neutral points; lunar disc; solar corona; eclipse august ... See more keywords
Theoretical analysis of the angle-of-arrival fluctuations for optical wavext propagation through solar corona turbulence
Sign Up to like & getrecommendations! Published in 2017 at "Optics Express"
DOI: 10.1364/oe.25.028022
Abstract: Optical communication is promising in deep space exploration, but there is the problem of angle-of-arrival fluctuations due to solar scintillation during superior solar conjunction. In this paper, an analytic expression of the angle-of-arrival fluctuations was… read more here.
Keywords: solar corona; angle arrival; arrival fluctuations; turbulence ... See more keywords
How Transverse Waves Drive Turbulence in the Solar Corona
Sign Up to like & getrecommendations! Published in 2022 at "Symmetry"
DOI: 10.3390/sym14020384
Abstract: Oscillatory power is pervasive throughout the solar corona, and magnetohydrodynamic (MHD) waves may carry a significant energy flux throughout the Sun’s atmosphere. As a result, over much of the past century, these waves have attracted… read more here.
Keywords: solar corona; waves drive; energy; transverse waves ... See more keywords