論文

査読有り 筆頭著者
2021年9月

Coronal properties of low-mass Population III stars and the radiative feedback in the early universe

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
  • Haruka Washinoue
  • ,
  • Takeru K. Suzuki

506
1
開始ページ
1284
終了ページ
1294
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1093/mnras/stab1809
出版者・発行元
OXFORD UNIV PRESS

We systematically investigated the heating of coronal loops on metal-free stars with various stellar masses and magnetic fields by magnetohydrodynamic simulations. It is found that the coronal property is dependent on the coronal magnetic field strength B-c because it affects the difference of the non-linearity of the Alfvenic waves. Weaker B-c leads to cooler and less dense coronae because most of the input waves dissipate in the lower atmosphere on account of the larger non-linearity. Accordingly EUV and X-ray luminosities also correlate with B-c, while they are emitted in a wide range of the field strength. Finally, we extend our results to evaluating the contribution from low-mass Population III coronae to the cosmic reionization. Within the limited range of our parameters on magnetic fields and loop lengths, the EUV and X-ray radiations give a weak impact on the ionization and heating of the gas at high redshifts. However, there still remains a possibility of the contribution to the reionization from energetic flares involving long magnetic loops.

リンク情報
DOI
https://doi.org/10.1093/mnras/stab1809
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000703918800083&DestApp=WOS_CPL
ID情報
  • DOI : 10.1093/mnras/stab1809
  • ISSN : 0035-8711
  • eISSN : 1365-2966
  • Web of Science ID : WOS:000703918800083

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