14 citations · 32 across the 5 of their papers we have counts for
6 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…
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…
Nowcast of an EUV dynamic spectrum during solar flares
Toshiki Kawai, Shinsuke Imada, Shohei Nishimoto +2
In addition to X-rays, extreme ultraviolet (EUV) rays radiated from solar flares can cause serious problems, such as communication failures and satellite drag. Therefore, methods f…
Velocity Structure and Temperature Dependence of Extreme-Ultraviolet Jet Observed by Hinode
Toshiki Kawai, Natsuo Kanda, Shinsuke Imada
The acceleration mechanism of EUV/X-ray jets is still unclear. For the most part, there are two candidates for the mechanism. One is magnetic reconnection, and the other is chromos…
Revisiting Kunitomo's Sunspot Drawings during 1835-1836 in Japan
Masashi Fujiyama, Hisashi Hayakawa, Tomoya Iju +7
We revisit the sunspot drawings made by the Japanese astronomer Kunitomo Toubei during 1835-1836 and recount the sunspot group number for each image. There are two series of drawin…
Sunspot Drawings by Japanese Official Astronomers in 1749-1750
Hisashi Hayakawa, Kiyomi Iwahashi, Masashi Fujiyama +7
Sunspot observations with telescopes in 18th century were carried out in Japan as well. One of these sunspot observations is recorded in an account called Sansaizusetsu narabini Ka…