72 citations · 254 across the 9 of their papers we have counts for
9 papers
Temporal and Periodic Variation of the MCMESI for the Last Two Solar Cycles; Comparison with the Number of Different Class X-Ray Solar Flares
A. Kilcik, P. Chowdhury, V. Sarp +4
In this study we compared the temporal and periodic variations of the Maximum CME Speed Index (MCMESI) and the number of different class (C, M, and X) solar X-Ray flares for the la…
Physical Characteristics of Umbral Dots Derived from a High Resolution Observation
Ali Kilcik, Volkan Sarp, Vasyl Yurchyshyn +2
The aim of this study is revisit the physical parameters of umbral dots (UDs) with the latest high resolution observations and contribute to the scientific understanding of their f…
Magnetic filed dynamics and varying plasma emission in large coronal loops
Seray Şahin, Vasyl Yurchyshyn, Pankaj Kumar +3
In this study we report detailed observations of magnetic environment at four footpoints of two warm coronal loops observed on 5 May 2016 in NOAA AR 12542 (Loop I) and 17 Dec 2015…
Temporal and Periodic Variations of Sunspot Counts in Flaring and Non-flaring Active Regions
A. Kilcik, V. Yurchyshyn, B. Donmez +3
We analyzed temporal and periodic behavior of sunspot counts (SSCs) in flaring (C, M, or X class flares), and non-flaring active regions (ARs) for the almost two solar cycles (1996…
Observations of a Series of Flares and Associated Jet-like Eruptions Driven by the Emergence of Twisted Magnetic Fields
Eun-Kyung Lim, Vasyl Yurchyshyn, Sung-Hong Park +8
We studied temporal changes of morphological and magnetic properties of a succession of four confined flares followed by an eruptive flare using the high-resolution New Solar Teles…
Dynamics in Sunspot Umbra as Seen in New Solar Telescope and Interface Region Imaging Spectrograph Data
Vasyl Yurchyshyn, Valentyna Abramenko, Ali Kilcik
We analyse sunspot oscillations using Interface Region Imaging Spectrograph (IRIS) slit-jaw and spectral data and narrow-band chromospheric images from the New Solar Telescope (NST…
Sunspot Count Periodicities in Different Zurich Sunspot Group Classes since 1986
A. Kilcik, A. Ozguc, V. B. Yurchyshyn +1
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…
Maximum Coronal Mass Ejection Speed as an Indicator of Solar and Geomagnetic Activities
A. Kilcik, V. B. Yurchyshyn, V. Abramenko +4
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 in…
Time Distributions of Large and Small Sunspot Groups Over Four Solar Cycles
A. Kilcik, V. B. Yurchyshyn, V. Abramenko +4
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…