Results 21 to 30 of about 1,249,380 (278)

Chromosphere of the quiet Sun

open access: yesAstronomy & Astrophysics
Context. The couplings between the photosphere, chromosphere, and corona in the quiet Sun (QS) are governed by a complex interplay between magnetic structuring, heating, mass-loading, and radiative cooling.
Noraz Q., Carlsson M., Aulanier G.
doaj   +3 more sources

Statistical Features of the Quiet Sun in EUV [PDF]

open access: yesSymposium - International Astronomical Union, 2001
Frequency distributions of the intensities of EUV emission lines in the quiet Sun have in the past usually been modelled using two Gaussians. Here we test this and other distribution functions against observed distributions with exceptional statistics. The data were obtained in a number of spectral lines observed with CDS and SUMER.
Pauluhn, A.   +4 more
openaire   +2 more sources

CAII lines in a quiet region on the Sun I. Dynamic processes in the solar atmosphere

open access: yesSolar-Terrestrial Physics, 2023
We have studied oscillation processes in the quiet Sun outside a coronal hole at different levels of the solar chromosphere. The study was based on spectroscopic observations of ionized calcium lines (K, H, and 849.8 nm) obtained by the Sayan Solar ...
Turova I. P.   +2 more
doaj   +1 more source

Small scale energy release driven by supergranular flows on the quiet Sun [PDF]

open access: yes, 2007
In this article we present data and modelling for the quiet Sun that strongly suggest a ubiquitous small-scale atmospheric heating mechanism that is driven solely by converging supergranular flows. A possible energy source for such events is the power
Diver, D., Potts, H.E., Khan, J.
core   +1 more source

Young children's perspectives of time: New directions for co‐constructing understandings of quality in ECEC

open access: yesBritish Educational Research Journal, EarlyView., 2023
Abstract Children's relationship with time in preschools is an under‐researched area. Young children rarely know how to measure time using a clock, but their experiences of time may contribute to understanding children's well‐being and debates about quality in preschools.
Kristín Dýrfjörð   +3 more
wiley   +1 more source

PRELIMINARY RESULTS OF INTERFEROMETRIC OBSERVATIONS OF THE QUIET SUN AT THE FREQUENCIES 8 – 32 MHZ

open access: yesOdessa Astronomical Publications, 2018
We studied a radio emission of the quiet Sun at decameter wavelengths to determine its angular dimensions. Observations were conducted using interferometers composed of antenna sections of the UTR-2 radio telescope.
V. A. Shepelev   +2 more
doaj   +1 more source

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   +1 more source

Mired in the shadows: quiet students in secondary schools [PDF]

open access: yes, 2011
Quiet students are a feature of the organisation of secondary schools. Using qualitative methods and Deleuzean conceptualisations of modern subjectivity, this paper explores the ways that quiet students negotiate the terrain of their school.
James Bell   +5 more
core   +1 more source

Quiet Sun Magnetic Fields [PDF]

open access: yes, 2022
Gegenstand dieser Doktorarbeit ist das Studium der Magnetischen Felder auf der "ruhigen Sonne". Diese Felder rhren von sehr kleinskaligen Bereichen auf der sonst "magnetfeldfreien" Sonnenoberfläche her und sind deshalb nur durch schwache Polarisationssignale gekennzeichnet.
Domínguez Cerdeña, Itahiza Francisco   +3 more
openaire   +2 more sources

Structure of the Solar Atmosphere: A Radio Perspective

open access: yesFrontiers in Astronomy and Space Sciences, 2020
Solar radio emission has been providing information about the Sun for over half a century. In order to fully exploit this information, one needs to have a broader view of the solar atmosphere, which cannot be provided by radio observations alone.
Costas E. Alissandrakis
doaj   +1 more source

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