Zobrazeno 1 - 10
of 50
pro vyhledávání: '"Valentyna Abramenko"'
Autor:
Vasyl Yurchyshyn, Valentyna Abramenko
Publikováno v:
The Astrophysical Journal. 722:122-130
We present results of a study of intermittency and multifractality of magnetic structures in solar active regions (ARs). Line-of-sight magnetograms for 214 ARs of different flare productivity observed at the center of the solar disk from January 1997
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4214c6c559ecccd3b342e0a502bf43f0
https://doi.org/10.1088/0004-637x/722/1/122
https://doi.org/10.1088/0004-637x/722/1/122
Autor:
Vasyl Yurchyshyn, Valentyna Abramenko
Publikováno v:
The Astrophysical Journal. 720:717-722
Line-of-sight magnetograms for 217 active regions (ARs) of different flare rate observed at the solar disk center from January 1997 until December 2006 are utilized to study the turbulence regime and its relationship to the flare productivity. Data f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::96cb5a10b851145ff3d320c3d926d9d9
https://doi.org/10.1088/0004-637x/720/1/717
https://doi.org/10.1088/0004-637x/720/1/717
Publikováno v:
The Astrophysical Journal. 714:1672-1678
We investigate the formation of isolated non-polar coronal holes (CHs) on the remnants of decaying active regions (ARs) at the minimum/early ascending phase of sunspot activity. We follow the evolution of four bipolar ARs and measure several paramete
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c338671aa915db59a865c3abce233f0c
https://doi.org/10.1088/0004-637x/714/2/1672
https://doi.org/10.1088/0004-637x/714/2/1672
Autor:
Jongchul Chae, Aleksandra Andic, Vasyl Yurchyshyn, Kwangsu Ahn, Valentyna Abramenko, Wenda Cao, Philip R. Goode
Publikováno v:
The Astrophysical Journal. 714:L31-L35
Highest resolution observations made with the new 1.6 m aperture solar telescope in Big Bear Solar Observatory during this time of historic inactivity on the Sun reveal new insights into the small-scale dynamics of the Sun's photosphere. The telescop
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6b658d9e7486fc7814b2c8c090c46d64
https://doi.org/10.1088/2041-8205/714/1/l31
https://doi.org/10.1088/2041-8205/714/1/l31
Autor:
Janet G. Luhmann, Jon A. Linker, Vasyl Yurchyshyn, Zoran Mikic, Christina O. Lee, Valentyna Abramenko
Publikováno v:
The Astrophysical Journal. 712:813-818
Low and mid-latitude coronal holes (CHs) observed on the Sun during the current solar activity minimum (from September 21, 2006, Carrington rotation (CR) 2048, until June 26, 2009 (CR 2084)) were analyzed using {\it SOHO}/EIT and STEREO-A SECCHI EUVI
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::56c60d57be1e0d821755fbd5b244f64d
https://doi.org/10.1088/0004-637x/712/2/813
https://doi.org/10.1088/0004-637x/712/2/813
Publikováno v:
The Astrophysical Journal. 705:426-435
Understanding the connection between the magnetic configurations of a coronal mass ejection (CME) and their counterpart in the interplanetary medium is very important in terms of space weather predictions. Our previous findings indicate that the orie
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fdbdba9ecb23dcc72ee0da68e3f9627d
https://doi.org/10.1088/0004-637x/705/1/426
https://doi.org/10.1088/0004-637x/705/1/426
Publikováno v:
The Astrophysical Journal. 690:1820-1828
The rapid and irreversible decay of penumbrae related to X-class flares has been found in a number of studies. Since the optical penumbral flows are closely associated with the morphology of sunspot penumbra, we use state-of-the-art Hinode data to tr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fa43aa5dc481e86e2143ce2e7b1b1b63
https://doi.org/10.1088/0004-637x/690/2/1820
https://doi.org/10.1088/0004-637x/690/2/1820
Publikováno v:
Solar Physics. 254:101-125
In this study we use the ordinal logistic regression method to establish a prediction model, which estimates the probability for each solar active region to produce X-, M-, or C-class flares during the next 1-day time period. The three predictive par
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2ba9d109715992ecd622639f6479fa17
https://doi.org/10.1007/s11207-008-9288-3
https://doi.org/10.1007/s11207-008-9288-3
Autor:
Manolis K. Georgoulis, Jack Ireland, R. T. James McAteer, Markus J. Aschwanden, Laura Morales, Gunnar Pruessner, Valentyna Abramenko, M. Dimitropoulou
Publikováno v:
CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET
The detection and characterization of self-organized criticality (SOC), in both real and simulated data, has undergone many significant revisions over the past 25 years. The explosive advances in the many numerical methods available for detecting, di
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e4d2b8fa8cc32f99d59a3094d8e6d58c
Publikováno v:
Solar Physics. 239:317-335
In this study, we present detailed description and analysis of the May 13, 2005 eruption, the corresponding coronal mass ejection (CME) and intense geomagnetic storm observed near the Earth on May 15, 2005. This isolated two-ribbon M8.0 flare and the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::23e51da258d3865f9c4be37cbe4e164e
https://doi.org/10.1007/s11207-006-0177-3
https://doi.org/10.1007/s11207-006-0177-3