Results 111 to 120 of about 37,593 (223)
Study on the relation of the solar coronal rotation with magnetic field structures. [PDF]
Sci Rep, 2023 Xiang NB +4 more
europepmc +1 more source
Statistical Investigation of Wave Propagation in the Quiet-Sun Using IRIS Spectroscopic Observations
The Astrophysical JournalIn this analysis, we use spectroscopic observations of the quiet Sun made by the IRIS instrument and investigate wave propagation. We analyze various spectral lines formed in different atmospheric layers, such as the photosphere, chromosphere, and ...
Kartika Sangal +4 more
doaj +1 more source
Frontiers in Astronomy and Space SciencesSpace weather models endeavoring to connect remote observations to in-situ measurements at various locations in the heliosphere invariably require a coronal model to connect the photosphere magnetically to the inner heliosphere.
Kalman J. Knizhnik
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The Astrophysical Journal LettersSolar filaments are believed to be a clump of cold plasma accumulated in the magnetic dips. However, the magnetic configuration of filaments and the key factors for their formation remains elusive.
Haitang Li +9 more
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Case Studies on Pre-eruptive X-class Flares using R-value in the Lower Solar Atmosphere
The Astrophysical JournalThe R -value is a measure of the strength of photospheric magnetic polarity inversion lines in active regions (ARs). This work investigates the possibility of a relation between R -value variations and the occurrence of X-class flares in ARs, not in the ...
Shreeyesh Biswal +5 more
doaj +1 more source
Solar and stellar photospheric abundances
Living Reviews in Solar Physics, 2016 The determination of photospheric abundances in late-type stars from spectroscopic observations is a well-established field, built on solid theoretical foundations. Improving those foundations to refine the accuracy of the inferred abundances has proven challenging, but progress has been made.
openaire +3 more sources
Model Stellar Photospheres [PDF]
Monthly Notices of the Royal Astronomical Society, 1932 openaire +2 more sources
Radiation Spectrum of the Photospheric Emission for a Turbulent Relativistic Jet
The Astrophysical JournalThe prompt gamma rays of gamma-ray bursts (GRBs) may originate from the photosphere of a relativistic jet. However, only a few GRBs have been observed with evident blackbody-like emission, for example, GRB 090902B.
Guo-Yu Li +3 more
doaj +1 more source
Turbulent convection as a significant hidden provider of magnetic helicity in solar eruptions. [PDF]
Sci Rep, 2023 Toriumi S, Hotta H, Kusano K.
europepmc +1 more source