Results 11 to 20 of about 1,306 (183)
SPECTROSCOPIC OBSERVATIONS OF HOT LINES CONSTRAINING CORONAL HEATING IN SOLAR ACTIVE REGIONS [PDF]
The Astrophysical Journal, 2009 ApJ, 2009, in ...
Patsourakos, S., Klimchuk, J. A.
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Solar Coronal Fe XVII X-Ray Line Ratios [PDF]
International Astronomical Union Colloquium, 1984 The SOLEX bragg crystal spectrometer experiment on the P78-1 satellite (Landecker, McKenzie and Rugge, 1979) has been used to determine accurate flux ratios of several strong solar Fe XVII x-ray emission lines in the ~ 15 to ~ 17 Å wavelength region.
H.R. Rugge, D.L. McKenzie
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The Effect of Solar Wind Expansion and Nonequilibrium Ionization on the Broadening of Coronal Emission Lines [PDF]
The Astrophysical Journal, 2020 Abstract When observing spectral lines in the optically thin corona, line-of-sight (LOS) effects can strongly affect the interpretation of the data, especially in regions just above the limb. We present a semiempirical forward model, called the Global Heliospheric Optically thin Spectral Transport Simulation (GHOSTS), to characterize ...
Chris R. Gilly, Steven R. Cranmer
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The Astrophysical Journal, 2023 Differential emission measure (DEM) inversion methods use the brightness of a set of emission lines to infer the line-of-sight (LOS) distribution of the electron temperature ( T _e ) in the corona.
Benjamin Boe +2 more
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Frontiers in Astronomy and Space Sciences, 2023 In this research, the Potential Field Source Surface–Wang–Sheeley–Arge (PFSS–WSA) solar wind model is used. This model consists of the Potential Field Source Surface (PFSS) coronal magnetic field extrapolation module and the Wang–Sheeley–Arge (WSA) solar
Xiao Zhang +4 more
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Asymmetries of solar coronal extreme ultraviolet emission lines [PDF]
Astronomy and Astrophysics, 2010 Astronomy & Astrophysics (accepted), 17 pages, 13 ...
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Characteristics of the Solar Coronal Line Profiles from Fabry–Perot Interferometric Observations [PDF]
Solar Physics, 2019 This article reports the analysis of a set of Fabry-Perot interferograms that were studied to probe the physical parameters of the inner solar corona. The observations were carried out in the coronal green line, Fe XIV 5302.86 Å, during the total solar eclipse of 21 June 2001 which occurred in Lusaka, Zambia. The study was performed in the radial range
Maya Prabhakar +2 more
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Coronal line intensity as an integrated index of solar activity
Astrophysics and Space Science, 1990 The relation between coronal green line intensity and high-speed streams of solar wind emitted by coronal holes or by loop structures of the corona is studied. As well as these exclusive regions of coronal radiative emission, other factors of solar activity have been taken into account in this relation, such as proton events, sunspot number, faculae ...
Xanthakis, J. +2 more
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Are Quasi-periodic Pulsations Independent of Loop Oscillations in Solar Flare?
The Astrophysical Journal, 2023 We investigated oscillations in an M8.7 solar flare (SOL2014-10-22), including quasi-periodic pulsations (QPPs) in light curves and Doppler shift oscillations in the flare loops.
Fanpeng Shi +5 more
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DIRECT OBSERVATION OF SOLAR CORONAL MAGNETIC FIELDS BY VECTOR TOMOGRAPHY OF THE CORONAL EMISSION LINE POLARIZATIONS [PDF]
The Astrophysical Journal Letters, 2016 ABSTRACT We present the first direct “observation” of the global-scale, 3D coronal magnetic fields of Carrington Rotation (CR) Cycle 2112 using vector tomographic inversion techniques. The vector tomographic inversion uses measurements of the Fe xiii 10747 Å Hanle effect polarization signals by the Coronal Multichannel Polarimeter (CoMP)
Kramar, M., Lin, H., Tomczyk, S.
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