Waves in the lower solar atmosphere: the dawn of next-generation solar telescopes

DB Jess, S Jafarzadeh, PH Keys, M Stangalini… - Living Reviews in Solar …, 2023 - Springer
Waves and oscillations have been observed in the Sun's atmosphere for over half a century.
While such phenomena have readily been observed across the entire electromagnetic …

An inside look at sunspot oscillations with higher azimuthal wavenumbers

DB Jess, T Van Doorsselaere, G Verth… - The Astrophysical …, 2017 - iopscience.iop.org
Solar chromospheric observations of sunspot umbrae offer an exceptional view of
magnetohydrodynamic wave phenomena. In recent years, a wealth of wave signatures …

Slow Magnetoacoustic Waves in Smoothly Nonuniform Coronal Plasma Structures

VV Fedenev, VM Nakariakov, SA Anfinogentov - Solar Physics, 2024 - Springer
Numerical simulations of a propagating slow magnetoacoustic wave guided by a field-
aligned low-β plasma nonuniformity are performed in terms of ideal magnetohydrodynamics …

Long-period quasi-periodic oscillations of a small-scale magnetic structure on the Sun

DY Kolotkov, VV Smirnova, PV Strekalova… - Astronomy & …, 2017 - aanda.org
Aims. Long-period quasi-periodic variations of the average magnetic field in a small-scale
magnetic structure on the Sun are analysed. The structure is situated at the photospheric …

Three-Minute Oscillations in Sunspot's Penumbrae and Superpenumbrae. Alfvénic or Sound?

A Chelpanov, N Kobanov - Solar Physics, 2024 - Springer
In the immediate sunspots' vicinity—their superpenumbra—3-minute line-of-sight (LOS)
velocity oscillations dominate in the photosphere and chromosphere. Oscillations of similar …

Influence of the magnetic field on oscillation spectra in solar faculae

AA Chelpanov, NI Kobanov, DY Kolobov - Solar Physics, 2016 - Springer
We study oscillation parameters in faculae above magnetic knots and in the areas adjacent
to them. Using Solar Dynamics Observatory (SDO) data, we analyse oscillations in magnetic …

Negative flare in the He I 10830 Å line in facula

N Kobanov, A Chelpanov, V Pulyaev - Journal of Atmospheric and Solar …, 2018 - Elsevier
A small-scale flare SOL2012-09-21T02: 19 (B2) occurred in a spotless active region that we
observed the Horizontal Solar Telescope which is equipped with a spectrograph. During the …

Long quasi-periodic oscillations of the faculae and pores

A Riehokainen, P Strekalova, A Solov'ev… - Astronomy & …, 2019 - aanda.org
Aims. The main goal of this work is to analyze the structural and temporal evolution of small-
scale magnetic structures (SSMSs) observed in the solar atmosphere, such as solitary …

Peculiarity of the oscillation stratification in sunspot penumbrae

DY Kolobov, AA Chelpanov, NI Kobanov - Solar Physics, 2016 - Springer
Spatial distributions of the dominant oscillation frequency obtained for four sunspots show a
feature shared by all the analysed levels of the solar atmosphere in these sunspots. This …

Behaviour of oscillations in loop structures above active regions

DY Kolobov, NI Kobanov, AA Chelpanov… - Advances in Space …, 2015 - Elsevier
In this study we combine the multiwavelength ultraviolet–optical (Solar Dynamics
Observatory, SDO) and radio (Nobeyama Radioheliograph, NoRH) observations to get …