SuperTIGER instrument abundances of galactic cosmic rays for the charge interval 41⩽Z⩽56

Nathan Elliot Walsh*, Yosui Akaike, Walter Robert Binns, Richard G. Bose, Terri J. Brandt, Dana L. Braun, Nicholas W. Cannady, Paul F. Dowkontt, Thomas Hams, Martin H. Israel, John F. Krizmanic, Allan W. Labrador, Richard A. Mewaldt, John W. Mitchell, Ryan P. Murphy, Georgia A. de Nolfo, Scott Nutter, Martin A. Olevitch, Brian F. Rauch, Kenichi SakaiMakoto Sasaki, Garry E. Simburger, Ed C. Stone, Teresa Tatoli, John Ennis Ward, Mark E. Wiedenbeck, Wolfgang V. Zober

*この研究の対応する著者

研究成果: Article査読

抄録

We report preliminary elemental abundance results from the 55-day long-duration-balloon flight of SuperTIGER (Super Trans-Iron Galactic Element Recorder) during the 2012–2013 austral summer. SuperTIGER measured the relative abundances of Galactic cosmic-ray (GCR) nuclei with high statistical precision and well resolved individual element peaks from 10Ne to 40Zr. SuperTIGER also made exploratory measurements of the relative abundances up to 56Ba. Although the statistics are low for elements heavier than 40Zr, we present, for the first time, relative abundance measurements of charges Z=41-56 with individual element resolution. GCR measurements up to 40Zr support a source acceleration model where supernovae in OB associations preferentially accelerate refractory elements that are more readily embedded in interstellar dust grains than volatiles. In addition, injection into the GCR for both refractory and volatile elements appears to follow a charge dependence consistent with their grain sputtering cross sections. By extending the GCR measurement range past 40Zr, we can begin to further constrain these models.

本文言語English
ページ(範囲)2666-2673
ページ数8
ジャーナルAdvances in Space Research
70
9
DOI
出版ステータスPublished - 2022 11月 1

ASJC Scopus subject areas

  • 航空宇宙工学
  • 天文学と天体物理学
  • 地球物理学
  • 大気科学
  • 宇宙惑星科学
  • 地球惑星科学(全般)

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