81 citations · 1k across the 49 of their papers we have counts for
49 papers
Energy conversion rate of an active region transient brightening estimated by a spectroscopic observation of Hinode
Toshiki Kawai, Shinsuke Imada
We statistically estimate the conversion rate of the energy released during an active-region transient brightening to Doppler motion and thermal and non-thermal energies. We used t…
A new broadening technique of numerically unresolved solar transition region and its effect on the spectroscopic synthesis using coronal approximation
Haruhisa Iijima, Shinsuke Imada
The transition region is a thin layer of the solar atmosphere that controls the energy loss from the solar corona. Large numbers of grid points are required to resolve this thin tr…
Stephan Prantner's Sunspot Observations during the Dalton Minimum
Hisashi Hayakawa, Shoma Uneme, Bruno P. Besser +2
In addition to regular Schwabe cycles (~ 11 years), solar activity also shows longer periods of enhanced or reduced activity. Of these, reconstructions of the Dalton Minimum provid…
Energy distribution of small-scale flares derived using genetic algorithm
Toshiki Kawai, Shinsuke Imada
To understand the mechanism of coronal heating, it is crucial to derive the contribution of small-scale flares, the so-called nanoflares, to the heating up of the solar corona. To…
Reanalyses of the Sunspot Observations of Fogelius and Siverus: Two "Long-Term" Observers during the Maunder Minimum
Hisashi Hayakawa, Tomoya Iju, Shoma Uneme +3
The solar activity during the Maunder Minimum (MM; 1645 -- 1715) has been considered significantly different from the one captured in modern observations, in terms of sunspot group…
A Solar Magnetic-fan Flaring Arch Heated by Non-thermal Particles and Hot Plasma from an X-ray Jet Eruption
Kyoung-Sun Lee, Hirohisa Hara, Kyoko Watanabe +10
We have investigated an M1.3 limb flare, which develops as a magnetic loop/arch that fans out from an X-ray jet. Using Hinode/EIS, we found that the temperature increases with heig…