Results 31 to 40 of about 1,511,102 (293)

Analytical Solution of the Hanle Effect in View of CLASP and Future Polarimetric Solar Studies

Atoms, 2019
We have solved a problem of the Hanle effect for the hydrogen Lyman- α line in an intuitive and straightforward way. The Stokes parameters amid an anisotropic radiation field and a magnetic field are derived as an analytical formula which ...
Motoshi Goto, Ryohko Ishikawa, Yusuke Iida, Saku Tsuneta   +3 more
doaj   +1 more source

Introduction to special issue on high speed solar wind streams and geospace interactions (HSS-GI) [PDF]

, 2009
This special issue of the Journal of Atmospheric and Solar-Terrestrial Physics is devoted to research into high speed solar wind streams (HSSs) and their effects on the region of near-Earth space commonly known as ‘geospace’.
Morley, S.K., Denton, M.H, Horne, Richard B, Borovsky, J.E., Tsurutani, B.T., Denton, M.H., Horne, R.B., McPherron, R.L.   +7 more
core   +1 more source

Existence of Purely Alvén Waves in Magnetic Flux Tubes with Arbitrary Cross-Sections

Physics, 2022
We study linear torsional Alfvén waves in a magnetic flux tube with an arbitrary cross-section. We assume that the equilibrium magnetic field is propagating in the z-direction in Cartesian coordinates x,y, and z.
Michael S. Ruderman, Nikolai S. Petrukhin   +1 more
doaj   +1 more source

Mesoscale Convective Systems and Extreme Precipitation on the West African Coast Linked to Ocean–Atmosphere Conditions during the Monsoon Period in the Gulf of Guinea

Atmosphere
This study investigates the importance of convective systems for extreme rainfall along the northern coast of the Gulf of Guinea (GG) and their relationship with atmospheric and oceanic conditions.
Sandrine Djakouré, Joël Amouin, Kouassi Yves Kouadio, Modeste Kacou   +3 more
doaj   +1 more source

Moreton waves and EUV waves in the solar atmosphere

地球与行星物理论评, 2023
Solar eruptions, which generate various types of wave phenomena in the solar atmosphere, are sources of space weather perturbations. These waves not only transport a large amount of energy, but also illuminate the properties of the magnetic field and ...
Pengfei Chen
doaj   +1 more source

Vorticity in the solar photosphere [PDF]

, 2010
Aims. We use magnetic and non-magnetic 3D numerical simulations of solar granulation and G-band radiative diagnostics from the resulting models to analyse the generation of small-scale vortex motions in the solar photosphere.Methods.
Shelyag, S., Keys, P.; id_orcid, Mathioudakis, Mihalis, Mathioudakis, M., Keenan, Francis, Shelyag, Sergiy, Keys, Peter, M. Mathioudakis, F. P. Keenan, Keenan, F. P., S. Shelyag, P. Keys   +11 more
core   +1 more source

The propagation and damping of slow magnetoacoustic waves in the solar atmosphere [PDF]

, 2012
The propagation and damping of slow magnetoacoustic waves in the solar atmosphere is investigated, with particular emphasis placed on waves with periodicities of five minutes. The basic model of a uniform temperature loop is extended by the addition of
Owen, Nicholas Robert
core   +2 more sources

Research progress in coronal magnetic field measurements

地球与行星物理论评, 2022
Different solar atmospheric layers are connected by the magnetic field of the Sun, which is the primary source for various types of solar activity. The magnetic activity of the Sun has a significant impact on the solar-terrestrial environment and human ...
Zihao Yang, Hui Tian, Wenxian Li, Jiale Zhang, Xianyong Bai, Yuhang Gao, Yajie Chen   +6 more
doaj   +1 more source

Rapid variations of Si IV spectra in a flare observed by interface region imaging spectrograph at a sub-second cadence

Frontiers in Astronomy and Space Sciences, 2022
We report on observations of highly-varying Si IV 1402.77 Å line profiles observed with the Interface Region Imaging Spectrograph (IRIS) during the M-class flare from 18 January 2022 at an unprecedented 0.8 s cadence.
Juraj Lörinčík, Juraj Lörinčík, Vanessa Polito, Vanessa Polito, Vanessa Polito, Bart De Pontieu, Bart De Pontieu, Bart De Pontieu, Sijie Yu, Nabil Freij, Nabil Freij   +10 more
doaj   +1 more source

Investigating Alfvénic wave propagation in coronal open-field regions [PDF]

, 2015
The physical mechanisms behind accelerating solar and stellar winds are a long-standing astrophysical mystery, although recent breakthroughs have come from models invoking the turbulent dissipation of Alfvén waves.
Morton, Richard, Tomczyk, Steve, Pinto, Rui   +2 more
core   +1 more source