Results 1 to 10 of about 11,539 (164)

Quiet Sun magnetic fields: an observational view

open access: yesLiving Reviews in Solar Physics, 2019
The quiet Sun is the region of the solar surface outside of sunspots, pores, and plages. In continuum intensity it appears dominated by granular convection.
L R Bellot Rubio, D Orozco Suarez
exaly   +3 more sources

Photospheric Swirls in a Quiet-Sun Region

open access: yesThe Astrophysical Journal
Swirl-shaped flow structures have been observed throughout the solar atmosphere, in both emission and absorption, at different altitudes and locations, and are believed to be associated with magnetic structures. However, the distribution patterns of such
Quan Xie   +4 more
doaj   +4 more sources

The quiet sun at mm wavelengths as seen by ALMA

open access: yesFrontiers in Astronomy and Space Sciences, 2022
Solar observations at sub-mm, mm and cm wavelengths offer a straightforward diagnostic of physical conditions in the solar atmosphere because they yield measurement of brightness temperature which, for optically thick features, equals intrinsic ...
Costas E. Alissandrakis   +2 more
doaj   +3 more sources

Quantifying Poynting Flux in the Quiet Sun Photosphere

open access: yesThe Astrophysical Journal, 2023
Poynting flux is the flux of magnetic energy, which is responsible for chromospheric and coronal heating in the solar atmosphere. It is defined as a cross product of the electric and magnetic fields, and in ideal MHD conditions it can be expressed in ...
Dennis Tilipman   +5 more
doaj   +3 more sources

Solar-cycle and Latitude Variations in the Internetwork Magnetism

open access: yesThe Astrophysical Journal, 2023
The importance of the quiet-Sun magnetism is that it is always there to a greater or lesser extent, being a constant provider of energy, independently of the solar cycle phase. The open questions about the quiet-Sun magnetism include those related to its
J. C. Trelles Arjona   +2 more
doaj   +1 more source

Study of Radio Transients from the Quiet Sun during an Extremely Quiet Time

open access: yesThe Astrophysical Journal, 2023
In this work, we study a class of recently discovered meter-wave solar transients referred to as Weak Impulsive Narrowband Quiet Sun Emission (WINQSEs).
Surajit Mondal   +2 more
doaj   +1 more source

MAGNETIC LOOPS IN THE QUIET SUN [PDF]

open access: yesThe Astrophysical Journal, 2010
accepted for ApJL Sunrise special issue, 8 Pages, 4 ...
Wiegelmann, T.   +11 more
openaire   +3 more sources

A New Component from the Quiet Sun from Radio to Gamma Rays: Synchrotron Radiation by Galactic Cosmic-Ray Electrons

open access: yesThe Astrophysical Journal, 2023
The quiet Sun, i.e., in its nonflaring state or nonflaring regions, emits thermal radiation from radio to ultraviolet. The quiet Sun also produces nonthermal radiation observed in gamma rays due to interactions of Galactic cosmic rays (GCRs) with the ...
Elena Orlando   +2 more
doaj   +1 more source

Transport of Cosmic-Ray Electrons from 1 au to the Sun

open access: yesThe Astrophysical Journal, 2023
Gamma rays are produced by cosmic-ray (CR) protons interacting with the particles at the solar photosphere and by CR electrons and positrons (CRes) via inverse Compton scattering of solar photons.
Vahé Petrosian   +2 more
doaj   +1 more source

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