20 citations · 105 across the 9 of their papers we have counts for
9 papers
Heating of a plasma sheet in nonequilibrium ionization with nonthermal electrons
Jin-Yi Lee, John C. Raymond, Katharine K. Reeves +4
A flux rope eruption on September 10, 2017 provides unique observations of the plasma sheet beneath the rising flux rope. The plasma sheet is likely in a nonequilibrium state in te…
On the Nature of Propagating Intensity Disturbances in Polar Plumes during the 2017 Total Solar Eclipse
Kyung-Suk Cho, Il-Hyun Cho, Maria S. Madjarska +8
The propagating intensity disturbances (PIDs) in plumes are still poorly understood and their identity (magnetoacoustic waves or flows) remains an open question. We investigate PID…
A New Type of Jets in a Polar Limb of Solar Coronal Hole
Il-Hyun Cho, Yong-Jae Moon, Kyung-Suk Cho +3
A new type of chromospheric jets in a polar limb of a coronal hole is discovered in the Ca II filtergram of the Solar Optical Telescope on board the \textit{Hinode}. We identify 30…
Non-equilibrium ionization effects on solar EUV and X-ray imaging observations
Jin-Yi Lee, John C. Raymond, Katharine K. Reeves +3
During transient events such as major solar eruptions, the plasma can be far from the equilibrium ionization state because of rapid heating or cooling. Non-equilibrium ionization~(…
Seismological determination of the Alfvén speed and plasma-beta in solar photospheric bright points
Il-Hyun Cho, Yong-Jae Moon, Valery M. Nakariakov +7
The Alfvén speed and plasma beta in photospheric bright points observed by the Broadband Filter Imager (BFI) of the Solar Optical Telescope (SOT) on board the \textit{Hinode} satel…
Oscillatory Response of the Solar Chromosphere to a Strong Downflow above a Sunspot
Hannah Kwak, Jongchul Chae, Donguk Song +3
We report three-minute oscillations in the solar chromosphere driven by a strong downflow event in a sunspot. We used the Fast Imaging Solar Spectrograph of the 1.6 m New Solar Tel…
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…
Study of Magnetic Helicity Injection in the Active Regions NOAA 9236 Producing Multiple Flare-associated CME Events
Sung-Hong Park, Kanya Kusano, Kyung-Suk Cho +6
To better understand a preferred magnetic field configuration and its evolution during Coronal Mass Ejection events, we investigated the spatial and temporal evolution of photosphe…
Changes in Sea-Level Pressure over South Korea Associated with High-Speed Solar Wind Events
Il-Hyun Cho, Young-Sil Kwak, Katsuhide Marubashi +3
We explore a possibility that the daily sea-level pressure (SLP) over South Korea responds to the high-speed solar wind event. This is of interest in two aspects: First, if there i…