Results 21 to 30 of about 4,073 (163)
Earth and Space Science, 2020 Solar prominences are structures of importance because of their role in polar field reversal. We study the long‐term variation of the time latitude distribution of solar prominences in this article.
Subhamoy Chatterjee +4 more
doaj +1 more source
Investigating the Origin of the First Ionization Potential Effect With a Shell Turbulence Model
Frontiers in Astronomy and Space Sciences, 2021 The enrichment of coronal loops and the slow solar wind with elements that have low First Ionization Potential, known as the FIP effect, has often been interpreted as the tracer of a common origin.
Victor Réville +6 more
doaj +1 more source
THE CHROMOSPHERE-LIKE ENVELOPE OF THE VARIABLE STAR T TAU
Odessa Astronomical Publications, 2017 The emission measure of the near-star chromosphere-like envelope of variable star T Tau with various mechanisms of radiation is computed. The normalization on the observed distribution of energy in continuum spectrum is carried out.
I. V. Shpychka, N. V. Virun
doaj +1 more source
Open Astronomy, 2021 We present intensity curves of solar flares obtained in the Hα hydrogen line and CaII H, CaIR 8542Å lines using multichannel spectrographs of Ondřejov Observatory (Czech Republic) for the period 2000–2012.
Kupryakov Yurij Alekseevich +5 more
doaj +1 more source
Solar-Terrestrial Physics, 2018 We have studied Ca II K line profiles, using two time series of spectrograms taken in two regions near the solar disk center. In each of the regions, the spectrograph slit cut out several areas of the quiet region and a plage.
Turova I.P. +2 more
doaj +1 more source
Journal of Space Weather and Space Climate, 2020 We present the observing program proposed by Paris and Côte d’Azur Observatories for monitoring solar activity during the upcoming cycle 25 and providing near real time images and movies of the chromosphere for space-weather research and applications ...
Malherbe Jean-Marie +2 more
doaj +1 more source
Why “Solar Tsunamis” Rarely Leave Their Imprints in the Chromosphere
The Astrophysical Journal Letters, 2023 Solar coronal waves frequently appear as bright disturbances that propagate globally from the eruption center in the solar atmosphere, just like the tsunamis in the ocean on Earth.
Ruisheng Zheng +12 more
doaj +1 more source
How Are the Abnormally Hot Chromosphere and Corona Heated by the Solar Magnetic Fields?
The Astrophysical JournalThe corona is a structure possessed by stars, including the Sun. The abnormal heating of the solar corona and chromosphere is one of the greatest mysteries in modern astronomy.
K. J. Li +5 more
doaj +1 more source
Intrastriatal Grafting of Chromospheres: Survival and Functional Effects in the 6-OHDA Rat Model of Parkinson's Disease. [PDF]
PLoS ONE, 2016 Cell replacement therapy in Parkinson's disease (PD) aims at re-establishing dopamine neurotransmission in the striatum by grafting dopamine-releasing cells. Chromaffin cell (CC) grafts produce some transitory improvements of functional motor deficits in
Alejandra Boronat-García +4 more
doaj +1 more source
Solar Radio Wide‐Band Spectroscopy and Imaging Facilities of the Chinese Meridian Project Phase II
Space Weather, Volume 23, Issue 11, November 2025.Abstract Solar eruptions, including flares and coronal mass ejections, are the most energetic phenomena in the solar system. These explosive events accelerate high‐energy particles and generate electromagnetic radiation from radio to gamma‐ray wavelengths, producing heliospheric disturbances and acting as primary drivers of space weather hazards.
Yihua Yan +19 more
wiley +1 more source