Results 21 to 30 of about 14,496 (257)

Constraints on Acoustic Wave Energy Fluxes and Radiative Losses in the Solar Chromosphere from Non-LTE Inversions

The Astrophysical Journal
Accurately assessing the balance between acoustic wave energy fluxes and radiative losses is critical for understanding how the solar chromosphere is thermally regulated.
J. M. da Silva Santos, M. Molnar, I. Milić, M. Rempel, K. Reardon, J. de la Cruz Rodríguez   +5 more
doaj   +2 more sources

An overall view of temperature oscillations in the solar chromosphere with ALMA. [PDF]

Philos Trans A Math Phys Eng Sci, 2021
Jafarzadeh S, Wedemeyer S, Fleck B, Stangalini M, Jess DB, Morton RJ, Szydlarski M, Henriques VMJ, Zhu X, Wiegelmann T, Guevara Gómez JC, Grant SDT, Chen B, Reardon K, White SM.   +14 more
europepmc   +2 more sources

The Solar Chromosphere [PDF]

Monthly Notices of the Royal Astronomical Society, 1933
S. Chandrasekhar
openalex   +3 more sources

Collisional dissipation of Alfvén waves in a partially ionised solar chromosphere [PDF]

Astronomy and Astrophysics, 2005
J. E. Leake, T. D. Arber, M. L. Khodachenko   +2 more
openalex   +3 more sources

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

The quiet sun at mm wavelengths as seen by ALMA

Frontiers in Astronomy and Space Sciences, 2022
Solar observations at sub-mm, mm and cm wavelengths offer a straightforward diagnostic of physical conditions in the solar atmosphere because they yield measurement of brightness temperature which, for optically thick features, equals intrinsic ...
Costas E. Alissandrakis, T. S. Bastian, Roman Brajša   +2 more
doaj   +1 more source

Chromosphere Activity Relation with Solar Dynamo Magnetic Activity Cycle [PDF]

Iranian Journal of Astronomy and Astrophysics, 2022
In this article, we analyzed the abnormal thickness of the chromosphere above the coronal holes (CH) at the poles of the Sun for 13 years (2010-2022), on the 15th of every month, by using AIA/SDO telescope data.
Ehsan Tavabi, Mina Rajabi, Sima Zeighami
doaj   +1 more source

CAII lines in a quiet region on the Sun I. Dynamic processes in the solar atmosphere

Solar-Terrestrial Physics, 2023
We have studied oscillation processes in the quiet Sun outside a coronal hole at different levels of the solar chromosphere. The study was based on spectroscopic observations of ionized calcium lines (K, H, and 849.8 nm) obtained by the Sayan Solar ...
Turova I. P., Grigoryeva S. A., Ozhogina O. A.   +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, Yihan Liu, Wenlong Liu, Bing Wang, Zhenyong Hou, Shiwei Feng, Xiangliang Kong, Zhenghua Huang, Hongqiang Song, Hui Tian, Pengfei Chen, Robertus Erdélyi, Yao Chen   +12 more
doaj   +1 more source

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   +1 more source