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

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

Research output: Contribution to journalConference articlepeer-review


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.

Original languageEnglish
Pages (from-to)862-863
Number of pages2
JournalMemorie della Societa Astronomica Italiana - Journal of the Italian Astronomical Society
Issue number4
Publication statusPublished - 2017
Externally publishedYes
Event2017 Conference Francesco's Legacy: Star Formation in Space and Time - Firenze, Italy
Duration: 2017 Jun 52017 Jun 9

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Radiology Nuclear Medicine and imaging
  • Astronomy and Astrophysics
  • Instrumentation
  • Atomic and Molecular Physics, and Optics


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