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Reducing Uncertainties in the Production of the Gamma-emitting Nuclei {sup 26}Al, {sup 44}Ti, and {sup 60}Fe in Core-collapse Supernovae by Using Effective Helium Burning Rates

Journal Article · · Astrophysical Journal Letters
 [1]; ;  [2]
  1. National Superconducting Cyclotron Laboratory, Michigan State University, 640 South Shaw Lane, East Lansing, MI 48824-1321 (United States)
  2. Joint Institute for Nuclear Astrophysics—Center for the Evolution of the Elements, Michigan State University, East Lansing, MI 48824-1321 (United States)
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We have used effective reaction rates (ERRs) for the helium burning reactions to predict the yield of the gamma-emitting nuclei {sup 26}Al, {sup 44}Ti, and {sup 60}Fe in core-collapse supernovae (SNe). The variations in the predicted yields for values of the reaction rates allowed by the ERR are much smaller than obtained previously, and smaller than other uncertainties. A “filter” for SN nucleosynthesis yields based on pre-SN structure was used to estimate the effect of failed SNe on the initial mass function averaged yields; this substantially reduced the yields of all these isotopes, but the predicted yield ratio {sup 60}Fe/{sup 26}Al was little affected. The robustness of this ratio is promising for comparison with data, but it is larger than observed in nature; possible causes for this discrepancy are discussed.
OSTI ID:
22654497
Journal Information:
Astrophysical Journal Letters, Journal Name: Astrophysical Journal Letters Journal Issue: 1 Vol. 839; ISSN 2041-8205
Country of Publication:
United States
Language:
English

Cited By (9)

The consequences of a nearby supernova on the early Solar System text January 2018
Stochastic Chemical Evolution of Radioactive Isotopes with a Monte Carlo Approach journal December 2019
Stochastic Chemical Evolution of Radioactive Isotopes with a Monte Carlo Approach text January 2019
Aluminium-26 from massive binary stars I: non-rotating models text January 2019
The Low Detection Rate of Pair Instability Supernovae and the Effect of the Core Carbon Fraction text January 2018
Gamma-Ray Emission of 60 Fe and 26 Al Radioactivity in Our Galaxy journal February 2020
The Low Detection Rate of Pair–instability Supernovae and the Effect of the Core Carbon Fraction journal August 2018
The consequences of a nearby supernova on the early solar system journal August 2018
Aluminium-26 from Massive Binary Stars. I. Nonrotating Models journal October 2019

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Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
ABUNDANCE
ALUMINIUM 26
COMPARATIVE EVALUATIONS
FILTERS
GALAXIES
GALAXY NUCLEI
HELIUM
HELIUM BURNING
IRON 60
ISOTOPE RATIO
MASS
NUCLEAR REACTIONS
NUCLEOSYNTHESIS
REACTION KINETICS
SUPERNOVAE
TITANIUM 44