Nucleosynthesis studies from the chmical abundances of superflare stars

2017 Fiscal Year Final Research Report

• Project/Area Number: 26400231
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Astronomy
• Research Institution: University of Hyogo
• Principal Investigator: Honda Satoshi 兵庫県立大学, 自然・環境科学研究所, 特任助教 (20425408)
• Project Period (FY): 2014-04-01 – 2018-03-31
• Keywords: 恒星フレア / 元素合成 / リチウム

Outline of Final Research Achievements

The purpose of this study is to investigate of the possibility of nucleosynthesis of elements by stellar flares from the chemical abundances of superflare stars. We performed the high-dispersion spectroscopy of 34 solar-type superflare stars with Subaru/HDS and derived the Li abundances of these objects. We confirm the large dispersion in the Li abundance, and the correlation with stellar parameters is not seen. The maximum energy and the number of the superflare also does not show any correlation with the Li abundance. In our observations, we could not find any evidence of Li production by superflares.
We could not find a clear difference between supareflare stars and our Sun. These results support the possibility that our Sun could generate supreflares.

Free Research Field

恒星物理