Oscillations and waves in sunspots
E Khomenko, M Collados - Living Reviews in Solar Physics, 2015 - Springer
A magnetic field modifies the properties of waves in a complex way. Significant advances
have been made recently in our understanding of the physics of sunspot waves with the help …
have been made recently in our understanding of the physics of sunspot waves with the help …
Photospheric origin of three-minute oscillations in a sunspot
The origin of the three-minute oscillations of intensity and velocity observed in the
chromosphere of sunspot umbrae is still unclear. We investigated the spatio-spectral …
chromosphere of sunspot umbrae is still unclear. We investigated the spatio-spectral …
MHD wave modes resolved in fine‐scale chromospheric magnetic structures
G Verth, DB Jess - Low‐Frequency Waves in Space Plasmas, 2016 - Wiley Online Library
Due to its complex and dynamic fine‐scale structure, the chromosphere is a particularly
challenging region of the Sun's atmosphere to understand. It is now widely accepted that to …
challenging region of the Sun's atmosphere to understand. It is now widely accepted that to …
Hinode and IRIS observations of the magnetohydrodynamic waves propagating from the photosphere to the chromosphere in a sunspot
R Kanoh, T Shimizu, S Imada - The Astrophysical Journal, 2016 - iopscience.iop.org
Magnetohydrodynamic (MHD) waves have been considered as energy sources for heating
the solar chromosphere and the corona. Although MHD waves have been observed in the …
the solar chromosphere and the corona. Although MHD waves have been observed in the …
Dynamics in sunspot umbra as seen in New Solar Telescope and Interface Region Imaging Spectrograph data
We analyze sunspot oscillations using Interface Region Imaging Spectrograph (IRIS) slit-jaw
and spectral data and narrow-band chromospheric images from the New Solar Telescope …
and spectral data and narrow-band chromospheric images from the New Solar Telescope …
Model of local oscillations in sunspots
YD Zhugzhda, RA Sych - Astronomy Letters, 2014 - Springer
We have analyzed the properties of oscillations in a sunspot based on SDO observations
with a duration of 6 h. The 3-min oscillation spectrum has turned out to consist of dozens of …
with a duration of 6 h. The 3-min oscillation spectrum has turned out to consist of dozens of …
Oscillations above sunspots and faculae: height stratification and relation to coronal fan structure
Oscillation properties in two sunspots and two facular regions are studied using Solar
Dynamics Observatory (SDO) data and ground-based observations in the Si i 10827Å and …
Dynamics Observatory (SDO) data and ground-based observations in the Si i 10827Å and …
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 …
observed the Horizontal Solar Telescope which is equipped with a spectrograph. During the …
Using flare-induced modulation of three-and five-minute oscillations for studying wave propagation in the solar atmosphere
A Chelpanov, N Kobanov - Solar Physics, 2021 - Springer
We propose a method for diagnosing the physical conditions in the solar atmosphere using
an increase in oscillation amplitudes resulting from minuscule solar flares. As an example …
an increase in oscillation amplitudes resulting from minuscule solar flares. As an example …
Oscillations Accompanying a He i 10830 Å Negative Flare in a Solar Facula
AA Chelpanov, NI Kobanov - Solar Physics, 2018 - Springer
On 21 September 2012, we carried out spectral observations of a solar facula in the Si i
10827 Å, He i 10830 Å, and H α \upalpha spectral lines. Later, in the process of analyzing …
10827 Å, He i 10830 Å, and H α \upalpha spectral lines. Later, in the process of analyzing …