Results 11 to 20 of about 5,203 (216)
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
openaire +5 more sources
Alfvén Wave Connection between the Chromosphere and the Corona of the Sun: An Analytical Study
The Astrophysical Journal, 2023 Alfvén waves are closely relevant to the three outstanding problems in the solar corona: coronal heating, solar wind acceleration, and the fractionization of low first ionization potential (FIP) elements.
Jongchul Chae, Kyoung-Sun Lee
doaj +2 more sources
NANOFLARE ACTIVITY IN THE SOLAR CHROMOSPHERE [PDF]
The Astrophysical Journal, 2014 We use ground-based images of high spatial and temporal resolution to search for evidence of nanoflare activity in the solar chromosphere. Through close examination of more than 10^9 pixels in the immediate vicinity of an active region, we show that the distributions of observed intensity fluctuations have subtle asymmetries.
Jess, D. B. +2 more
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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
core +8 more sources
Why “Solar Tsunamis” Rarely Leave Their Imprints in the Chromosphere [PDF]
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 +2 more sources
On the Nature of the Solar Chromosphere [PDF]
, 2006 Proceedings 23th NSO Workshop, ASP Conference Series, 354, 282, in ...
Astrophysics +5 more
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A Comparison Between Cool Chromospheric and Hot Coronal Jets [PDF]
Iranian Journal of Astronomy and Astrophysics, 2023 The similarities between Ca and x-ray jets suggest that their formation mechanism should be the same. Surges are almost cool plasma jets and are usually observed in Hα at ground-based observation, space observations also detect Surges.
Ehsan Tavabi, Azam Mollatayefeh
doaj +1 more source
Chromospheric Jets and Their Properties [PDF]
Iranian Journal of Astronomy and Astrophysics, 2022 In this study we review solar chromospheric jets and characteristics of them. The chromosphere and transition region are the interface between the solar photosphere and the corona, which plays a key role in the formation and acceleration of the solar ...
Ehsan Tavabi, Sima Zeighami
doaj +1 more source
Physical Properties of Radio Stars Based on LAMOST Spectral Survey
Universe, 2022 Radio emission has been detected for all types of stars in the Hertzsprung Russell diagram. Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) low and medium-resolution spectroscopic surveys provide a good opportunity to obtain the ...
Liyun Zhang +6 more
doaj +1 more source
Frontiers in Astronomy and Space Sciences, 2023 The flare activity of the Sun has been studied for decades, using both space- and ground-based telescopes. The former have mainly focused on the corona, while the latter have mostly been used to investigate the conditions in the chromosphere and ...
Alberto Sainz Dalda +4 more
doaj +1 more source