Results 11 to 20 of about 3,072 (224)
FARLEY-BUNEMAN INSTABILITY IN THE SOLAR CHROMOSPHERE [PDF]
The Astrophysical Journal, 2009 The Farley-Buneman instability is studied in the partially ionized plasma of the solar chromosphere taking into account the finite magnetization of the ions and Coulomb collisions. We obtain the threshold value for the relative velocity between ions and electrons necessary for the instability to develop.
Gogoberidze, Grigol +3 more
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The Cold Heart of the Solar Chromosphere [PDF]
Symposium - International Astronomical Union, 1994 The early 1990's heralded the deployment of vastly improved space instruments in the ultraviolet (HST) and X-ray (ROSAT) bands, where thermal inhomogeneities in high-excitation chromospheres and coronae are seen in their most favorable light. The infrared spectrum provides a key complementary view of inhomogeneities, but only recently has begun to be ...
Ayres, Thomas (5284981), Ayres, Thomas
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Observing the Solar Chromosphere [PDF]
, 2007 This review is split into two parts: one on chromospheric line formation in answer to the frequent question "where is my line formed", and one presenting state-of-the-art imagery of the chromosphere. In the first part I specifically treat the formation of the Na D lines, Ca II H & K, and Halpha.
Astrophysics +5 more
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On the Rotation of the Solar Chromosphere [PDF]
The Astrophysical Journal, 2020 Abstract Rotation is a significant characteristic of the Sun and other stars, and it plays an important role in understanding their dynamo actions and magnetic activities. In this study, the rotation of the solar chromospheric activity is investigated from a global point of view with an over 40 yr Mg ii index.
Jing-Chen Xu +2 more
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The Astrophysical Journal, 2023 The intensity and the linear scattering polarization profiles of the hydrogen Ly α line encode valuable information on the thermodynamic and magnetic structure of the upper layers of the solar chromosphere.
E. Alsina Ballester +2 more
doaj +1 more source
Wave Heating of the Solar Chromosphere [PDF]
, 2022 The solar chromosphere is well known to be in a radiative balance that requires an unac- counted source of heating. In this thesis I present observational constraints on the wave energy flux in the solar chromosphere, which is one of the favored ...
Molnar, Momchil Emil
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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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Constraining the Systematics of (Acoustic) Wave Heating Estimates in the Solar Chromosphere
The Astrophysical Journal, 2023 Acoustic wave heating is believed to contribute significantly to the missing energy input required to maintain the solar chromosphere in its observed state.
Momchil E. Molnar +4 more
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Dissipation of Magnetohydrodynamic Waves in the Solar Stratified Flux Tubes [PDF]
Iranian Journal of Astronomy and Astrophysics, 2023 Chromosphere is the second layer of the Sun with high variability. The increase of the temperature and the decrease of the density are observed in this layer. This unusual behavior is one of the most important problems in the solar corona.
Zahra Fazel
doaj +1 more source
Solar Spectroscopy and (Pseudo-)Diagnostics of the Solar Chromosphere [PDF]
, 2010 I first review trends in current solar spectrometry and then concentrate on comparing various spectroscopic diagnostics of the solar chromosphere. Some are actually not at all chromospheric but just photospheric or clapotispheric and do not convey ...
Raveendran, A.S.N. +6 more
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