Results 21 to 30 of about 438 (164)

Radio Measurements of the Magnetic Field in the Solar Chromosphere and the Corona

Frontiers in Astronomy and Space Sciences, 2021
The structure of the upper solar atmosphere, on all observable scales, is intimately governed by the magnetic field. The same holds for a variety of solar phenomena that constitute solar activity, from tiny transient brightening to huge Coronal Mass ...
Costas E. Alissandrakis, Dale E. Gary
doaj   +1 more source

Spectral Analysis of Solar Radio Type III Bursts from 20 kHz to 410 MHz

The Astrophysical Journal, 2022
We present the statistical analysis of the spectral response of solar radio type III bursts over the wide frequency range between 20 kHz and 410 MHz. For this purpose, we have used observations that were carried out using both spaced-based (Wind/Waves ...
K. Sasikumar Raja, Milan Maksimovic, Eduard P. Kontar, Xavier Bonnin, Philippe Zarka, Laurent Lamy, Hamish Reid, Nicole Vilmer, Alain Lecacheux, Vratislav Krupar, Baptiste Cecconi, Lahmiti Nora, Laurent Denis   +12 more
doaj   +1 more source

Solar energetic particles and radio burst emission

Journal of Space Weather and Space Climate, 2017
We present a statistical study on the observed solar radio burst emission associated with the origin of in situ detected solar energetic particles. Several proton event catalogs in the period 1996–2016 are used.
Miteva Rositsa, Samwel Susan W., Krupar Vratislav   +2 more
doaj   +1 more source

Isolated Sunspot with a Dark Patch in the Coronal Emission

Open Astronomy, 2012
On the base of the 17 GHz radio maps of the Sun taken with the Nobeyama Radio Heliograph we estimate plasma parameters in the specific region of the sunspot atmosphere in the active region AR 11312.
Bezrukov D. A., Ryabov B. I., Shibasaki K.   +2 more
doaj   +1 more source

Characterizing the Spectral Structure of Weak Impulsive Narrowband Quiet Sun Emissions

The Astrophysical Journal, 2023
Weak Impulsive Narrowband Quiet Sun Emissions (WINQSEs) are a newly discovered class of radio emission from the solar corona. These emissions are characterized by their extremely impulsive, narrowband, and ubiquitous nature.
Surajit Mondal, Divya Oberoi, Ayan Biswas, Devojyoti Kansabanik   +3 more
doaj   +1 more source

Observations of Circularly Polarized Radio Emission from the “Quiet” Sun at Frequencies <100 MHz

The Astrophysical Journal
The presence of the magnetic field makes the solar coronal medium birefringent. Research indicates that an appreciable degree of circular polarization (DCP) can be observed in the thermal radio emission at frequencies
Shaik Sayuf, C. Kathiravan, R. Ramesh, Indrajit V. Barve, G. V. S. Gireesh, Kshitij S. Bane   +5 more
doaj   +1 more source

Fibre structure of decametric type II radio bursts as a manifestation of emission propagation effects in a disturbed near-solar plasma [PDF]

Annales Geophysicae, 2009
This paper addresses the fine structure of solar decametric type II radio bursts in the form of drifting narrowband fibres on the dynamic spectrum. Observations show that this structure appears in those events where there is a coronal mass ejection ...
A. N. Afanasiev, A. N. Afanasiev
doaj   +1 more source

ELECTRON CYCLOTRON MASER EMISSION IN CORONAL ARCHES AND SOLAR RADIO TYPE V BURSTS

The Astrophysical Journal, 2013
Solar radio type V bursts were classified as a special spectral class based on their moderately long duration, wide bandwidth, and sense of polarization opposite of associated type III bursts. However, type V bursts are also closely related to the preceding type III bursts.
J. F. Tang, D. J. Wu, C. M. Tan
openaire   +1 more source

Spaceborne and spaceborn: Physiological aspects of pregnancy and birth during interplanetary flight

Experimental Physiology, EarlyView.
Abstract Crewed interplanetary return missions that are on the planning horizon will take years, more than enough time for initiation and completion of a pregnancy. Pregnancy is viewed as a sequence of processes – fertilization, blastocyst formation, implantation, gastrulation, placentation, organogenesis, gross morphogenesis, birth and neonatal ...
Arun V. Holden
wiley   +1 more source

Excitation of Multiperiodic Kink Motions in Solar Flare Loops: Possible Application to Quasiperiodic Pulsations

The Astrophysical Journal Letters, 2023
Magnetohydrodynamic (MHD) waves are often invoked to interpret quasiperiodic pulsations (QPPs) in solar flares. We study the response of a straight flare loop to a kink-like velocity perturbation using three-dimensional MHD simulations and forward model ...
Mijie Shi, Bo Li, Shao-Xia Chen, Mingzhe Guo, Shengju Yuan   +4 more
doaj   +1 more source