Outputs (4)

On the generation of hydrodynamic shocks by mixed beams and occurrence of sunquakes in flares (2015)
Journal Article
Zharkov, S., & Zharkova, V. (2015). On the generation of hydrodynamic shocks by mixed beams and occurrence of sunquakes in flares. Solar Physics, 290(11), 3163-3188. https://doi.org/10.1007/s11207-015-0813-x

Observations of solar flares with sunquakes by space- and ground-based instruments reveal essentially different dynamics of seismic events in different flares. Some sunquakes are found to be closely associated with the locations of hard X-ray (HXR) a... Read More about On the generation of hydrodynamic shocks by mixed beams and occurrence of sunquakes in flares.

A statistical correlation of sunquakes based on their seismic and white-light emission (2015)
Journal Article
Buitrago-Casas, J. C., Martínez Oliveros, J. C., Lindsey, C., Calvo-Mozo, B., Krucker, S., Glesener, L., & Zharkov, S. (2015). A statistical correlation of sunquakes based on their seismic and white-light emission. Solar Physics, 290(11), 3151-3162. https://doi.org/10.1007/s11207-015-0786-9

Several mechanisms have been proposed to explain the transient seismic emission, i.e. “sunquakes,” from some solar flares. Some theories associate high-energy electrons and/or white-light emission with sunquakes. High-energy charged particles and the... Read More about A statistical correlation of sunquakes based on their seismic and white-light emission.

Heartbeat of the Sun from principal component analysis and prediction of solar activity on a millenium timescale (2015)
Journal Article
Zharkova, V. V., Shepherd, S. J., Popova, E., & Zharkov, S. I. (2015). Heartbeat of the Sun from principal component analysis and prediction of solar activity on a millenium timescale. Scientific reports, 5(1), Article ARTN 15689. https://doi.org/10.1038/srep15689

We derive two principal components (PCs) of temporal magnetic field variations over the solar cycles 21–24 from full disk magnetograms covering about 39% of data variance, with σ = 0.67. These PCs are attributed to two main magnetic waves travelling... Read More about Heartbeat of the Sun from principal component analysis and prediction of solar activity on a millenium timescale.

Spectroscopic signatures related to a sunquake (2015)
Journal Article
Matthews, S. A., Harra, L. K., Zharkov, S., & Green, L. M. (2015). Spectroscopic signatures related to a sunquake. The Astrophysical journal, 812(1), 35. https://doi.org/10.1088/0004-637x/812/1/35

© 2015. The American Astronomical Society. All rights reserved.. The presence of flare-related acoustic emission (sunquakes (SQs)) in some flares, and only in specific locations within the flaring environment, represents a severe challenge to our cur... Read More about Spectroscopic signatures related to a sunquake.