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High dispersion spectroscopy of solar-type superflare stars with Subaru/HDS
Yuta Notsu, Satoshi Honda, Hiroyuki Maehara +4
We carried out spectroscopic observations with Subaru/HDS of 50 solar-type superflare stars found from Kepler data. More than half (34 stars) of the target stars show no evidence o…
High Dispersion Spectroscopy of Solar-type Superflare Stars. III. Lithium Abundances
Satoshi Honda, Yuta Notsu, Hiroyuki Maehara +4
We report on the abundance analysis of Li in solar-type (G-type main sequence) superflare stars which were found by the analysis of Kepler photometric data. Li is a key element to…
Statistical properties of superflares on solar-type stars based on 1-min cadence data
Hiroyuki Maehara, Takuya Shibayama, Yuta Notsu +4
We searched for superflares on solar-type stars using Kepler data with 1 min sampling in order to detect superflares with short duration. We found 187 superflares on 23 solar-type…