Zobrazeno 1 - 10
of 51
pro vyhledávání: '"Yurchyshyn, V. B."'
Seven-year long seeing-free observations of solar magnetic fields with the Helioseismic and Magnetic Imager (HMI) on board the Solar Dynamics Observatory (SDO) were used to study the sources of the solar mean magnetic field, SMMF, defined as the net
Externí odkaz:
http://arxiv.org/abs/1707.05971
We studied the emergence process of 42 active region (ARs) by analyzing the time derivative, R(t), of the total unsigned flux. Line-of-sight magnetograms acquired by the Helioseismic and Magnetic Imager (HMI) onboard the Solar Dynamics Observatory (S
Externí odkaz:
http://arxiv.org/abs/1703.00739
In this study, we used two methods to investigate the periodic behavior of sunspot counts in four categories for the time period January 1986-October 2013. These categories include the counts from simple (A and B), medium (C), large (D, E, and F), an
Externí odkaz:
http://arxiv.org/abs/1407.5895
An essential parameter for models of coronal heating and fast solar wind acceleration that rely on the dissipation of MHD turbulence is the characteristic energy-containing length $\lambda_{\bot}$ of the squared velocity and magnetic field fluctuatio
Externí odkaz:
http://arxiv.org/abs/1307.4421
Autor:
Kitiashvili, I. N., Abramenko, V. I., Goode, P. R., Kosovichev, A. G., Lele, S. K., Mansour, N. N., Wray, A. A., Yurchyshyn, V. B.
Turbulent properties of the quiet Sun represent the basic state of surface conditions, and a background for various processes of solar activity. Therefore understanding of properties and dynamics of this `basic' state is important for investigation o
Externí odkaz:
http://arxiv.org/abs/1206.5300
Generation and diffusion of the magnetic field on the Sun is a key mechanism responsible for solar activity on all spatial and temporal scales - from the solar cycle down to the evolution of small-scale magnetic elements in the quiet Sun. The solar d
Externí odkaz:
http://arxiv.org/abs/1112.2750
Autor:
Kilcik, A., Yurchyshyn, V. B., Abramenko, V., Goode, P. R., Ozguc, A., Rozelot, J. P., Cao, W.
Publikováno v:
The Astrophysical Journal, 731:30 (2011) 10
Here we analyze solar activity by focusing on time variations of the number of sunspot groups (SGs) as a function of their modified Zurich class. We analyzed data for solar cycles 2023 by using Rome (cycles 2021) and Learmonth Solar Observatory (cycl
Externí odkaz:
http://arxiv.org/abs/1111.3999
Autor:
Kilcik, A., Yurchyshyn, V. B., Abramenko, V., Goode, P. R., Gopalswamy, N., Ozguc, A., Rozelot, J. P.
Publikováno v:
The Astrophysical Journal, 727:44, 2011
We investigate the relationship between the monthly averaged maximal speeds of coronal mass ejections (CMEs), international sunspot number (ISSN), and the geomagnetic Dst and Ap indices covering the 1996-2008 time interval (solar cycle 23). Our new f
Externí odkaz:
http://arxiv.org/abs/1111.4000
Autor:
Kilcik, A., Yurchyshyn, V. B., Rempel, M., Abramenko, V., Kitai, R., Goode, P. R., Cao, W., Watanabe, H.
We studied bright umbral dots (UDs) detected in a moderate size sunspot and compared their statistical properties to recent MHD models. The study is based on high resolution data recorded by the New Solar Telescope at the Big Bear Solar Observatory a
Externí odkaz:
http://arxiv.org/abs/1111.3997
We observe that intergranular jets, originating in the intergranular space surrounding individual granules, tend to be associated with granular fragmentation, in particular, with the formation and evolution of a bright granular lane (BGL) within indi
Externí odkaz:
http://arxiv.org/abs/1106.5535