Zobrazeno 1 - 10
of 121
pro vyhledávání: '"Koleva, K."'
We present the observations of a quiescent filament eruption and its deflection from the radial direction. The event occurred in the southern solar hemisphere on 2021 May 9 and was observed by the Atmospheric Imaging Assembly (AIA) on board the Solar
Externí odkaz:
http://arxiv.org/abs/2411.10110
The present study provides important details on homologous eruptions of a solar prominence that occurred in active region NOAA 10904 on 2006 August 22. We report on the preeruptive phase of the homologous feature as well as the kinematics and the mor
Externí odkaz:
http://arxiv.org/abs/1605.02299
Publikováno v:
In Journal of Atmospheric and Solar-Terrestrial Physics January 2021 212
We study a sequence of eruptive events including filament eruption, a GOES C4.3 flare and a coronal mass ejection. We aim to identify the possible trigger(s) and precursor(s) of the filament destabilisation; investigate flare kernel characteristics;
Externí odkaz:
http://arxiv.org/abs/1405.2194
Autor:
Stoyanov, K. A., Zamanov, R. K., Bode, M. F., Pritchard, J., Tomov, N. A., Gomboc, A., Koleva, K.
We report high resolution spectral observations of the yellow symbiotic star V417 Cen obtained in 2004. We find that the equivalent widths of the emission lines decreased, while the brightness increased. The FWHMs and wavelengths of the emission line
Externí odkaz:
http://arxiv.org/abs/1403.6603
Autor:
Koleva, K., Madjarska, M. S., Duchlev, P., Schrijver, C. J., Vial, J. -C., Buchlin, E., Dechev, M.
We aim at investigating the morphology, kinematic and helicity evolution of a loop-like prominence during its eruption. We use multi-instrument observations from AIA/SDO, EUVI/STEREO and LASCO/SoHO. The kinematic, morphological, geometrical, and heli
Externí odkaz:
http://arxiv.org/abs/1202.4541
The main purpose of this study is the determination of solar minimum date of the new sunspot cycle No 24. It is provided by using of four types of mean daily data values for the period Jan 01. 2006 - Dec 31. 2009: (1) the solar radioindex F10.7; (2)
Externí odkaz:
http://arxiv.org/abs/1008.0375
The subject of this paper is the existence and stability of solar cycles with duration in the range of 20-250 years. Five type of data series are used: 1) The Zurich series (1749-2009), the mean annual International sunspot number Ri; 2) The Group su
Externí odkaz:
http://arxiv.org/abs/1007.3143
On the base of the most qualitative GOES satellites data for the period AD 1980-2009 and multiple regression model the "synthetic" series of the monthly numbers of soft X-ray flares (separately for the classes C, M, X and total numbers) were built fo
Externí odkaz:
http://arxiv.org/abs/1007.2735
Autor:
Zamanov, R. K., Boeva, S., Bachev, R., Bode, M. F., Dimitrov, D., Stoyanov, K. A., Gomboc, A., Tsvetkova, S. V., Slavcheva-Mihova, L., Spassov, B., Koleva, K., Mihov, B.
We report observations of the flickering variability of the recurrent nova RS Oph at quiescence on the basis of simultaneous observations in 5 bands (UBVRI). RS Oph has flickering source with (U-B)_0=-0.62 \pm 0.07, (B-V)_0=0.15 \pm 0.10, (V-R)_0=0.2
Externí odkaz:
http://arxiv.org/abs/1001.0852