81 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Kyoto UniversityJP6 papers
- National Institute of Polar ResearchJP3 papers
- The Graduate University for Advanced Studies, SOKENDAIJP3 papers
- National Astronomical Observatory of JapanJP2 papers
- National Institute of Japanese LiteratureJP2 papers
- The University of TokyoJP2 papers
- Institute of Space and Astronautical ScienceJP1 paper
- Japan Aerospace Exploration AgencyJP1 paper
- Japan Agency for Marine-Earth Science and TechnologyJP1 paper
- Japan Society for the Promotion of ScienceJP1 paper
- Nagoya UniversityJP1 paper
- Niigata UniversityJP1 paper
8 papers
Numerical Investigation of Efficient Electron Acceleration at an Unsteady Solar Flare Loop-Top
Yoshiaki Sato, Takafumi Kaneko, Noriyuki Narukage +1
Using magnetohydrodynamic (MHD) fields and guiding-center test-particle calculations, this study investigates how time-dependent loop-top dynamics modulate the adiabatic energizati…
Records of Sunspots and Aurora Candidates in the Chinese Official Histories of the Yuán and Míng Dynasties during 1261-1644
Hisashi Hayakawa, Harufumi Tamazawa, Yusuke Ebihara +4
Records of observations of sunspots and auroras in pre-telescopic historical documents provide useful information about past solar activity both in long-term trends and short-term…
Historical Auroras in the 990s: Evidence for Great Magnetic Storms
Hisashi Hayakawa, Harufumi Tamazawa, Yurina Uchiyama +5
Recently, a significant carbon-14 enhancement in the year 994 in tree rings has been found, suggesting an extremely large cosmic ray flux event during a short period. The origin of…
Earliest Datable Records of Aurora-like Phenomena in the Astronomical Diaries from Babylonia
Hisashi Hayakawa, Yasuyuki Mitsuma, Yusuke Ebihara +4
The Astronomical Diaries from Babylonia (ADB) are an excellent source of information of natural phenomena, including astronomical ones, in pre-Christ era because it contains the re…
East Asian Observations of Low Latitude Aurora during the Carrington Magnetic Storm
Hisashi Hayakawa, Kiyomi Iwahashi, Harufumi Tamazawa +6
The magnetic storm around 1859 September 2, caused by so-called Carrington flare, was the most intense in the history of modern scientific observations, and hence is considered to…
Aurora Candidates from the Chronicle of Qīng Dynasty in Several Degrees of Relevance
Akito D. Kawamura, Hisashi Hayakawa, Harufumi Tamazawa +2
We present the result of the survey of sunspots and auroras in , the draft chronicle of dynasty, for the p…
"Unusual Rainbow and White Rainbow" A new auroral candidate in oriental historical sources
Hisashi Hayakawa, Hiroaki Isobe, Akito Davis Kawamura +3
Solar activity has been recorded as auroras or sunspots in various historical sources. These records are of much importance for investigating both long-term solar activities and ex…
Saturation of Stellar Winds from Young Suns
Takeru K. Suzuki, Shinsuke Imada, Ryuho Kataoka +4
We investigate mass losses via stellar winds from sun-like main sequence stars with a wide range of activity levels. We perform forward-type magnetohydrodynamical numerical experim…