Výsledky vyhledávání - "Kostadinka Koleva"

Akademický článek

Spatial Relationship between CMEs and Prominence Eruptions during SC 24 and SC 25

Autor: Kostadinka Koleva, Nat Gopalswamy, Pooja Devi, Seiji Yashiro, Grzegorz Michalek

Publikováno v: The Astrophysical Journal, Vol 966, Iss 1, p 22 (2024)

During their propagation, coronal mass ejections (CMEs) and prominences sometimes display a nonradial motion. During the years after the solar minimum, the CME central position angle tended to be offset closer to the equator compared to that of the a

Externí odkaz: https://doaj.org/article/8d7f544e48ba4558a1fddd7550b4b1bc

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Akademický článek

A Statistical Analysis of Deflection of Coronal Mass Ejections in the Field of View of LASCO Coronagraphs

Autor: Grzegorz Michalek, Nat Gopalswamy, Seiji Yashiro, Kostadinka Koleva

Publikováno v: The Astrophysical Journal, Vol 956, Iss 1, p 59 (2023)

Coronal mass ejections (CMEs) can generate the most severe geomagnetic disturbances. One of the most critical factors affecting a CME’s geoeffectiveness is its trajectory. It is crucial to determine whether and when CME will hit Earth. It is common

Externí odkaz: https://doaj.org/article/c06210be11eb42d69e62db4e7136f0f3

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Sympathetic Quiet and Active Region Filament Eruptions

Autor: Kostadinka Koleva, Pooja Devi, Ramesh Chandra, Reetika Joshi, Peter Duchlev, Momchil Dechev

We present the observations of three sympathetic filament eruptions occurring on 19 July 2015 namely F1, F2, and F3. The events were observed in UV/EUV wavelengths by Atmospheric Imaging Assembly onboard the Solar Dynamics Observatory and by Global O

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e334f26ee8d4ebc84b1d18fa025ed0d0

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Emission line variability in the spectrum of V417 Centauri

Autor: Stovanov, K. A., Zamanov, R. K., Bode, M. F., Pritchard, J., Tomov, N. A., Gomboc, A., Kostadinka Koleva

Publikováno v: Scopus-Elsevier

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: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::229e27e75f067d27f11db8e0ba913e35

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