Results 21 to 30 of about 1,379,332 (142)

Expanding Magnetic Canopy Structure and Parasitic Polarities in a Quiet-Sun Network Element Observed by SUNRISE iii/SCIP

The Astrophysical Journal Letters
We present high-resolution multiline spectropolarimetric observations of a quiet-Sun network element obtained with the S unrise iii Chromospheric Infrared SpectroPolarimeter.
Ryan J. Campbell, Carlos Quintero Noda, Mihalis Mathioudakis, Manuel Collados, Jack McFall, David B. Jess, Sami K. Solanki, Andreas Lagg, Achim Gandorfer, Jose Carlos del Toro Iniesta, Yukio Katsukawa, Pietro Bernasconi, Thomas Berkefeld, Alex Feller, Tino L. Riethmüller, Alberto Álvarez-Herrero, Masahito Kubo, H. N. Smitha, David Orozco Suárez, Bianca Grauf, Michael Carpenter, Alexander Bell, Valentín Martínez Pillet, Francisco Javier Bailén, Julian Blanco Rodríguez, Juan Sebastián Castellanos Durán, Edvarda Harnes, Johannes Hölken, Francisco A. Iglesias, Ryohtaroh T. Ishikawa, Yusuke Kawabata, Takuma Matsumoto, Takayoshi Oba, Azaymi L. Siu-Tapia, Hanna Strecker, Dušan Vukadinović, Hirohisa Hara, Toshifumi Shimizu   +37 more
doaj   +1 more source

Formation of the Transition Region for the Quiet Sun

The Astrophysical Journal Letters, 2023
We propose a partially ionized collisional two-fluid model of the formation of the transition region between the cool dense chromosphere and hot tenuous corona for the quiet Sun.
Paul Song, Jiannan Tu, David B. Wexler
doaj   +1 more source

Simulating Siberian Radioheliograph response to the quiet Sun

Solar-Terrestrial Physics, 2018
The Siberian Radioheliograph (SRH) correlation plot is the time dependence of the sum of absolute values of complex correlations over all baselines. These plots are built for each operating frequency of SRH.
Lesovoi S.V., Kobets V.S.
doaj   +1 more source

On the Magnetic Nature of Quiet-Sun Chromospheric Grains

The Astrophysical Journal Letters, 2023
Ca ii K grains, i.e., intermittent, short-lived (about 1 minute), periodic (2–4 minutes), pointlike chromospheric brightenings, are considered to be the manifestations of acoustic waves propagating upward from the solar surface and developing into shocks
María Jesús Martínez González, Tanausú del Pino Alemán, Adur Pastor Yabar, C. Quintero Noda, Andrés Asensio Ramos   +4 more
doaj   +1 more source

Observations of Locally Excited Waves in the Low Solar Atmosphere Using the Daniel K. Inouye Solar Telescope

The Astrophysical Journal Letters
We present an interpretation of the recent Daniel K. Inouye Solar Telescope (DKIST) observations of propagating wave fronts in the lower solar atmosphere.
Shah Mohammad Bahauddin, Catherine E. Fischer, Mark P. Rast, Ivan Milic, Friedrich Woeger, Matthias Rempel, Peter H. Keys, Thomas R. Rimmele   +7 more
doaj   +1 more source

Observations of coronal holes with the Siberian Radioheliograph

Solar-Terrestrial Physics
Multi-wavelength observations of a coronal hole (CH) with two-dimensional spatial resolution have been made for the first time in the frequency range from 2.8 to 12 GHz.
Globa M. V., Meshalkina N. S., Sych R. A.   +2 more
doaj   +1 more source

Magnetic Topology and Loop Statistics in Observed Coronal Holes Using Potential Field Modeling

The Astrophysical Journal
Potential field source surface (PFSS) models are widely used to study the solar corona and form the basis for solar wind forecasting, yet they often fail to reproduce observed properties of coronal holes.
Stephan G. Heinemann, Jens Pomoell, Manuela Temmer   +2 more
doaj   +1 more source

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

, 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, Thompson, Greg, Thompson, G., Bell, James, Greg Thompson, Bell, J.   +5 more
core   +1 more source

Chromospheric Spectra of Small-scale Dynamic Features Observed on and off Solar Disk with Goode Solar Telescope

The Astrophysical Journal
Our study of H α line profiles of rapid blue- and redshifted excursions measured with Goode Solar Telescope revealed an asymmetrical three-peak structure present in the blue wing of the H α line, suggesting complex internal velocity fields that may ...
Vasyl Yurchyshyn, Seray Şahin, Anneliese Schmidt, Eun-Kyung Lim, Nicolas Gorceix, Xu Yang, Wenda Cao   +6 more
doaj   +1 more source

ALMA Detection of Dark Chromospheric Holes in the Quiet Sun

, 2019
We present Atacama Large Millimeter/submillimeter Array (ALMA) observations of a quiet-Sun region at a wavelength of 3 mm, obtained during the first solar ALMA cycle on 2017 April 27, and compare them with available chromospheric observations in the UV ...
Solanki, S., White, S., Loukitcheva, M.
core   +1 more source