Results 1 to 10 of about 41,638 (224)

Laboratory studies in ultraviolet solar physics [PDF]

The research activity comprised the measurement of basic atomic processes and parameters which relate directly to the interpretation of solar ultraviolet observations and to the development of comprehensive models of the component structures of the solar
Gardner, L. D., Kohl, J. L., Parkinson, W. H., Raymond, J. C., Smith, P. L.   +4 more
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Effect of coronal temperature on the scale of solar chromospheric jets

, 2015
We investigate the effect of coronal temperature on the formation process of solar chromospheric jets using two-dimensional magnetohydrodynamic simulations of the region from the upper convection zone to the lower corona.
Iijima, H., Yokoyama, T.
core   +1 more source

Conditions for electron-cyclotron maser emission in the solar corona

, 2016
Context. The Sun is an active source of radio emission ranging from long duration radio bursts associated with solar flares and coronal mass ejections to more complex, short duration radio bursts such as solar S bursts, radio spikes and fibre bursts ...
Bloomfield, D. S., Gallagher, P. T., Morosan, D. E., Zucca, P.   +3 more
core   +1 more source

Effects of coronal disturbances on the ionization state of the solar wind [PDF]

A theoretical investigation of the relationship between physical conditions in coronal disturbances and the ionization states of the resulting perturbed solar wind was conducted.
Withbroe, G. L.
core   +1 more source

Thermal Diagnostics with the Atmospheric Imaging Assembly onboard the Solar Dynamics Observatory: A Validated Method for Differential Emission Measure Inversions

, 2015
We present a new method for performing differential emission measure (DEM) inversions on narrow-band EUV images from the Atmospheric Imaging Assembly (AIA) onboard the Solar Dynamics Observatory (SDO). The method yields positive definite DEM solutions by
Boerner, P., Chen, F., Cheung, Mark C. M., Malanushenko, A., Peter, H., Schrijver, C. J., Testa, P.   +6 more
core   +1 more source

Evolution of Relative Magnetic Helicity: New Boundary Conditions for the Vector Potential

, 2017
We recently proposed a method to calculate the relative magnetic helicity in a finite volume for a given magnetic field which however required the flux to be balanced separately on all the sides of the considered volume. In order to allow finite magnetic
Buechner, Joerg, Skala, Jan, Yang, Shangbin, Zhang, Hongqi   +3 more
core   +1 more source

Dynamic Temperature Structure of the Corona [PDF]

, 2012
The solar corona is heated to million degrees and information about the temperature structure is a key to understand the heating mechanisms. Although it is not easy to measure, the temperature looks to be remarkably steady in the solar corona and in ...
REALE, Fabio
core  

Influence of Ionization on the Polytropic Index of the Solar Atmosphere within Local Thermodynamic Equilibrium Approximation

The Astrophysical Journal
An initial theoretical attempt to explain the observed decrease of the polytropic/adiabatic index γ in the solar corona has been accomplished. The chemical reactions of the ionization–recombination processes in local thermodynamic equilibrium (LTE) of a ...
Albert M. Varonov, Todor M. Mishonov
doaj   +1 more source

Modelling the total solar eclipse in 2024 with COCONUT

Astronomy & Astrophysics
Context. Coronal modelling is crucial for a better understanding of solar physics and heliophysics. Accurate plasma conditions at the outer boundary of a solar corona lead to more precise space weather predictions.
Baratashvili T., Wang H. P., Sorokina D., Lani A., Poedts S.   +4 more
doaj   +1 more source

Temporal Behavior and Latitudinal Relationships between Key Solar Parameters and Green Line Emissions in the Solar Corona

The Astrophysical Journal Letters
Understanding the link between solar parameters and their influence on green line emissions would help unravel the complexities of eruptive phenomena within the solar corona. This study explores the intricate relationship between green line emissions and
Jacob Oloketuyi, Yu Liu, Linhua Deng, Abouazza Elmhamdi, Khaled Nasser Almosabeh, Fengrong Zhu, Haitang Li, Feiyang Sha, Qiang Liu, Oladipo Emmanuel Abe, Charles Owolabi, Olufemi Olusola   +11 more
doaj   +1 more source