Observation of the 60 Fe nucleosynthesis-clock isotope in galactic cosmic rays-Reference-Cited by-同舟云学术

Observation of the 60 Fe nucleosynthesis-clock isotope in galactic cosmic rays

Published:2016-05-06 Issue:6286 Volume:352 Page:677-680
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Binns W. R.¹,Israel M. H.¹,Christian E. R.²,Cummings A. C.³,de Nolfo G. A.²,Lave K. A.¹,Leske R. A.³,Mewaldt R. A.³,Stone E. C.³,von Rosenvinge T. T.²,Wiedenbeck M. E.⁴

Affiliation:

1. Washington University, St. Louis, MO 63130, USA.

2. NASA/Goddard Space Flight Center, Greenbelt, MD 20771, USA.

3. California Institute of Technology, Pasadena, CA 91125, USA.

4. Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA.

Abstract

Cosmic rays from a nearby supernova Supernova explosions produce unstable isotopes, spreading them through space in the form of cosmic rays. Binns et al. used NASA's Advanced Composition Explorer spacecraft to search for previously undetected traces of 60 Fe in cosmic rays passing through the solar system. Seventeen years of observations detected just 15 60 Fe nuclei—a small but statistically significant number. Because 60 Fe is radioactive, with a half-life of 2.6 million years, these nuclei must have formed relatively recently in a nearby supernova. The most likely candidates are massive stars in the Scorpius-Centaurus association. Science , this issue p. 677

Funder

NASA

California Institute of Technology

Jet Propulsion Laboratory

Washington University in St. Louis

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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