Zobrazeno 1 - 10
of 54
pro vyhledávání: '"Shergelashvili, B. M."'
Publikováno v:
A&A, 2024, 683, A86
The power spectra of the fluctuation noise of the solar active region (AR) areas and magnetic fluxes sequentially observed in time contain information about their geometrical features and the related fundamental physical processes. These spectra are
Externí odkaz:
http://arxiv.org/abs/2401.07134
Publikováno v:
A&A 662, A30 (2022)
The small-scale moving intensity enhancements remotely observed in the extreme ultraviolet images of the solar active regions, which we refer to as active region moving campfires (ARMCs), are related to local plasma temperature and/or density enhance
Externí odkaz:
http://arxiv.org/abs/2203.06285
Autor:
Dumbadze, G., Shergelashvili, B. M., Poedts, S., Zaqarashvili, T. V., Khodachenko, M., De Causmaecker, P.
Publikováno v:
A&A 653, A39 (2021)
We studied the low-frequency $\lesssim 0.5\;$h$^{-1}$ (long-period $\gtrsim 2\;$h) oscillations of active regions (ARs). The investigation is based on an analysis of a time series built from Solar Dynamics Observatory/Helioseismic and Magnetic Imager
Externí odkaz:
http://arxiv.org/abs/2109.04189
Autor:
Philishvi, E., Shergelashvili, B. M., Buitendag, S., Raes, J., Poedts, S., Khodachenko, M. L.
Publikováno v:
A&A 645, A52 (2021)
We propose a novel methodology to identity flows in the solar atmosphere and classify their velocities as either supersonic, subsonic, or sonic. The proposed methodology consists of three parts. First, an algorithm is applied to the Solar Dynamics Ob
Externí odkaz:
http://arxiv.org/abs/2011.07634
We study the effects of heat flows and velocity shear on the parallel firehose instability in weakly collisional plasma flow. For this purpose we apply an anisotropic 16-moments MHD fluid closure model that takes into account the pressure and tempera
Externí odkaz:
http://arxiv.org/abs/2005.04313
Autor:
Dididze, G., Shergelashvili, B. M., Melnik, V. N., Dorovskyy, V. V., Brazhenko, A. I., Poedts, S., Zaqarashvili, T. V., Khodachenko, M.
Publikováno v:
A&A 625, A63 (2019)
As is well known, CME propagation often results in the fragmentation of the solar atmosphere on smaller regions of density (magnetic field) enhancement (depletion). It is expected that this type of fragmentation may have radio signatures. The general
Externí odkaz:
http://arxiv.org/abs/1903.12279
Autor:
Philishvili, E., Shergelashvili, B. M., Zaqarashvili, T. V., Kukhianidze, V., Ramishvili, G., Khodachenko, M., Poedts, S., De Causmaecker, P.
Publikováno v:
A&A 600, A67 (2017)
Context. The dynamics of the flaring loops in active region (AR) 11429 are studied. The observed dynamics consist of several evolution stages of the flaring loop system during both the ascending and descending phases of the registered M-class flare.
Externí odkaz:
http://arxiv.org/abs/1612.09562
Autor:
Dumbadze, G., Shergelashvili, B. M., Kukhianidze, V., Ramishvili, G., Zaqarashvili, T. V., Khodachenko, M., Gurgenashvili, E., Poedts, S., De Causmaecker, P.
Publikováno v:
A&A 597, A93 (2017)
Active regions (ARs) are the main sources of variety in solar dynamic events. Automated detection and identification tools need to be developed for solar features for a deeper understanding of the solar cycle. Of particular interest here are the dyna
Externí odkaz:
http://arxiv.org/abs/1610.01509
We present a linear stability analysis of the perturbation modes in anisotropic MHD flows with velocity shear and strong magnetic field. Collisionless or weakly collisional plasma is described within the 16-momentum MHD fluid closure model, that take
Externí odkaz:
http://arxiv.org/abs/1407.6943
The main goal is to study the dynamics of the gravitationally stratified, field-free cavities in the solar atmosphere, located under small-scale, cylindrical magnetic canopies, in response to explosive events in the lower-lying regions (due to granul
Externí odkaz:
http://arxiv.org/abs/0905.2302