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Properties of chromospheric evaporation and plasma dynamics of a solar flare from IRIS observations
Viacheslav M. Sadykov, Santiago Vargas Dominguez, Alexander G. Kosovichev +3
Dynamics of hot chromospheric plasma of solar flares is a key to understanding of mechanisms of flare energy release and particle acceleration. A moderate M1.0 class flare of 12 Ju…
Using MHD simulations to model H-alpha and UV spectral lines for interpretation of IRIS and NST data
Viacheslav M. Sadykov, Alexander G. Kosovichev
We present results of non-LTE modeling of H-alpha 6563 A and Mg II k&h 2796 A and 2803 A lines. This modeling is important for interpretation of coordinated observations from the r…
Multi-wavelength high-resolution observations of a small-scale emerging magnetic flux event and the chromospheric and coronal response
Santiago Vargas Dominguez, Alexander Kosovichev, Vasyl Yurchyshyn
State-of-the-art solar instrumentation is revealing magnetic activity of the Sun with unprecedented resolution. Observations with the 1.6m New Solar Telescope of the Big Bear Solar…
Helioseismic Constraints and Paradigm Shift in Solar Dynamo
Alexander G. Kosovichev, Valery V. Pipin, Junwei Zhao
Helioseismology provides important constraints for the solar dynamo problem. However, the basic properties and even the depth of the dynamo process, which operates also in other st…
Sunquakes: helioseismic response to solar flares
Alexander G. Kosovichev
Sunquakes observed in the form of expanding wave ripples on the surface of the Sun during solar flares represent packets of acoustic waves excited by flare impacts and traveling th…
Sunquakes and starquakes
Alexander G. Kosovichev
In addition to well-known mechanisms of excitation of solar and stellar oscillations by turbulent convection and instabilities, the oscillations can be excited by an impulsive loca…