Results 31 to 40 of about 3,957 (226)
An ALMA Observation of Time Variations in Chromospheric Temperature of a Solar Plage Region
Frontiers in Astronomy and Space Sciences, 2022 Nanoflares and the shock formation of magnetohydrodynamic waves in the solar chromosphere have been considered as key physical mechanisms of the heating of the chromosphere and corona.
Masashi Abe +5 more
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, 1994 We show results from SO/Sacramento Peak data to discuss three issues: (i)--the spatial occurrence of chromospheric 3--min oscillations; (ii)--the validity of Ca II H&K line-center Doppler Shift measurements; (iii)--the signi ?cance of oscillation power and phase at frequencies above 10 mHz.
Lites, B.W., Rutten, R.J., Thomas, J.H.
openaire +2 more sources
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
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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
Measuring Magnetic Field With Atacama Large Millimeter/Submillimeter Array
Frontiers in Astronomy and Space Sciences, 2020 The article discusses the use of magnetic bremsstrahlung at short radio wavelengths for measuring solar magnetic fields. The polarization and brightness spectra observed at millimeter wavelengths can be used to deduce the vertical component of the ...
Maria Loukitcheva +2 more
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Spectropolarimetric fluctuations in a sunspot chromosphere [PDF]
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2020 The instrumental advances made in this new era of 4 m class solar telescopes with unmatched spectropolarimetric accuracy and sensitivity will enable the study of chromospheric magnetic fields and their dynamics with unprecedented detail. In this regard, spectropolarimetric diagnostics can provide invaluable insight into magneto-hydrodynamic (MHD) wave ...
M. Stangalini +10 more
openaire +7 more sources
Signatures of Magnetic Flux Ropes in the Low Solar Atmosphere Observed in High Resolution
Frontiers in Astronomy and Space Sciences, 2019 Magnetic flux ropes (MFRs) are important physical features closely related to solar eruptive activities with potential space weather consequences. Studying MFRs in the low solar atmosphere can shed light on their origin and subsequent magnetic structural
Haimin Wang +3 more
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Solar Chromospheric Heating by Kinetic Alfvén Waves Based on the Three-fluid Model
The Astrophysical JournalThe heating mechanism of the solar chromosphere with a partially ionized plasma has been one of the challenging problems in solar physics. Kinetic Alfvén waves (KAWs) have been applied by many authors to study the heating of the corona and chromosphere ...
Jin-Run Ou +3 more
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Solar Physics From Unconventional Viewpoints
Frontiers in Astronomy and Space Sciences, 2018 We explore new opportunities for solar physics that could be realized by future missions providing sustained observations from vantage points away from the Sun-Earth line.
Sarah E. Gibson +8 more
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