Results 1 to 10 of about 1,264 (196)
Basal chromospheric flux and Maunder Minimum-type stars: the quiet-Sun chromosphere as a universal phenomenon [PDF]
Astronomy & Astrophysics, 2012 Aims. We demonstrate the universal character of the quiet-Sun chromosphere among inactive stars (solar-type and giants). By assessing the main physical processes, we shed new light on some common observational phenomena. Methods.
K.‐P. Schröder +4 more
core +4 more sources
Ultraviolet Oscillations in the Chromosphere of the Quiet Sun [PDF]
The Astrophysical Journal, 2004 Quiet-Sun oscillations in the four Transition Region and Coronal Explorer (TRACE) ultraviolet passbands centered on 1700, 1600, 1216, and 1550 Angstrom are studied using a wavelet-based technique.
R. T. J. McAteer +5 more
core +3 more sources
Small-scale swirl events in the quiet Sun chromosphere [PDF]
Astronomy and Astrophysics, 2009 Context. Recent progress in instrumentation enables solar observations with high resolution simultaneously in the spatial, temporal, and spectral domains. Aims. We use such high-resolution observations to study small-scale structures and dynamics
S. Wedemeyer-Böhm +1 more
core +6 more sources
Astronomy & AstrophysicsContext. The solar chromosphere is a dynamic and crucial interface between the solar interior and its interplanetary environment, regulating how energy is locally deposited into heat and transported into the upper atmospheric layers.
Quentin Noraz, M. Carlsson, G. Aulanier
core +4 more sources
Estimating the longitudinal magnetic field in the chromosphere of quiet-Sun magnetic concentrations [PDF]
, 2023 Context. Details of the magnetic field in the quiet-Sun chromosphere are key to our understanding of essential aspects of the solar atmosphere. However, the strength and orientation of this magnetic field have not been thoroughly studied at high spatial ...
S. Esteban Pozuelo +4 more
core +4 more sources
Alfvén Wave Connection between the Chromosphere and the Corona of the Sun: An Analytical Study [PDF]
, 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
openalex +2 more sources
The quiet-Sun photosphere and chromosphere [PDF]
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2012 Abstract The overall structure and the fine structure of the solar photosphere outside active regions are largely understood, except possibly the important roles of a turbulent near-surface dynamo at its bottom, internal gravity waves at its top and small-scale vorticity. Classical one-dimensional static radiation-escape modelling has
Robert J. Rutten
openalex +5 more sources
Processes in the magnetized chromosphere of the Sun [PDF]
Proceedings of the International Astronomical Union, 2008 AbstractWe review physical processes in magnetized chromospheres on the Sun. In the quiet chromosphere, it is useful to distinguish between the magnetic network on the boundaries of supergranules, where strong magnetic fields are organized in mainly vertical flux tubes and internetwork regions in the cell interiors, which have traditionally been ...
S. S. Hasan
openalex +2 more sources
Characteristics of acoustic-wave heating in simulations of the quiet Sun chromosphere [PDF]
Understanding energy transfer through the chromosphere is paramount to solving the coronal heating problem. We investigated the energy dissipation of acoustic waves in the chromosphere of the quiet Sun using 3D radiative magnetohydrodynamic (rMHD ...
Elias R. Udnæs, Tiago M. D. Pereira
core +3 more sources
Properties of shock waves in the quiet Sun chromosphere [PDF]
Astronomy & Astrophysics, 2022 Context.Short-lived (100 s or less), sub-arcsec to a couple of arcsec sized features of enhanced brightenings in the narrowband images at the H2Vand K2Vpositions of the Ca IIH&K lines in the quiet Sun are known as bright grains. These bright grains are interpreted as manifestations of acoustic shock waves in the chromosphere.Aims.We aim to study ...
Harsh Mathur +4 more
+7 more sources