Stellar wind prevents the ISM gas from accreting onto the pop III stars

H. Susa, S. Tanaka, G. Chiaki, N. Tominaga

研究成果: Conference article査読


Hyper Metal Poor (HMP) stars in our Galactic halo are often interpreted as the population III (pop III) stars covered by a slight amount of accreted heavy elements from ISM. However, in the case of the Sun, the solar wind maintains the heliosphere which prevents the ISM gas from accreting. We assess the effects of the stellar wind from main sequence pop III stars on the metal accretion onto the surface of them. As a result, we find the heavy elements are ionized by the stellar radiation to be picked up by the stellar wind, thus they cannot touchdown the stellar surface. This result strongly suggests that the HMP stars were born from the gas with a slight amount of metals, which preserves the information of the progenitor stars.

ジャーナルMemorie della Societa Astronomica Italiana - Journal of the Italian Astronomical Society
出版ステータスPublished - 2017
イベント2017 Conference Francesco's Legacy: Star Formation in Space and Time - Firenze, Italy
継続期間: 2017 6 52017 6 9

ASJC Scopus subject areas

  • 電子工学および電気工学
  • 放射線学、核医学およびイメージング
  • 天文学と天体物理学
  • 器械工学
  • 原子分子物理学および光学


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