PRODUCTION OF {sup 26}Al, {sup 44}Ti, AND {sup 60}Fe IN CORE-COLLAPSE SUPERNOVAE: SENSITIVITY TO THE RATES OF THE TRIPLE ALPHA AND {sup 12}C({alpha}, {gamma}){sup 16}O REACTIONS

Journal Article · Tue Jul 20 04:00:00 EDT 2010 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/718/1/357· OSTI ID:21455142

Tur, Clarisse; Austin, Sam M ^[1]; Heger, Alexander ^[2]

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1. National Superconducting Cyclotron Laboratory, Michigan State University, 1 Cyclotron Laboratory, East Lansing, MI 48824-1321 (United States)
2. School of Physics and Astronomy, University of Minnesota, Twin Cities, Minneapolis, MN 55455-0149 (United States)

We have studied the sensitivity to variations in the triple alpha and {sup 12}C({alpha}, {gamma}){sup 16}O reaction rates of the production of {sup 26}Al, {sup 44}Ti, and {sup 60}Fe in core-collapse supernovae (SNe). We used the KEPLER code to model the evolution of 15 M {sub sun}, 20 M {sub sun}, and 25 M {sub sun} stars to the onset of core collapse and simulated the ensuing SN explosion using a piston model for the explosion and an explosion energy of 1.2 x 10{sup 51} erg. Calculations were performed for the Anders and Grevesse and Lodders abundances. Over a range of twice the experimental uncertainty, {sigma}, for each helium-burning rate, the production of {sup 26}Al, {sup 60}Fe, and their ratio vary by factors of 5 or more. For some species, similar variations were observed for much smaller rate changes, 0.5{sigma} or less. The production of {sup 44}Ti was less sensitive to changes in the helium-burning rates. Production of all three isotopes depended on the solar abundance set used for the initial stellar composition.

• OSTI ID: 21455142
• Journal Information: Astrophysical Journal, Journal Name: Astrophysical Journal Journal Issue: 1 Vol. 718; ISSN ASJOAB; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
79 ASTRONOMY AND ASTROPHYSICS
ABUNDANCE
ALPHA REACTIONS
ALUMINIUM 26
ALUMINIUM ISOTOPES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
BINARY STARS
CARBON 12
CARBON 12 TARGET
CARBON ISOTOPES
CHARGED-PARTICLE REACTIONS
ELECTROMAGNETIC RADIATION
ELECTRON CAPTURE RADIOISOTOPES
ERUPTIVE VARIABLE STARS
EVEN-EVEN NUCLEI
EVOLUTION
EXPLOSIONS
GAMMA RADIATION
HELIUM BURNING
INTERMEDIATE MASS NUCLEI
IONIZING RADIATIONS
IRON 60
IRON ISOTOPES
ISOTOPES
KINETICS
LIGHT NUCLEI
NUCLEAR REACTIONS
NUCLEI
NUCLEOSYNTHESIS
ODD-ODD NUCLEI
OXYGEN 16
OXYGEN ISOTOPES
RADIATIONS
RADIOISOTOPES
REACTION KINETICS
SECONDS LIVING RADIOISOTOPES
STABLE ISOTOPES
STAR BURNING
STAR EVOLUTION
STARS
SUPERNOVAE
SYNTHESIS
TARGETS
TITANIUM 44
TITANIUM ISOTOPES
VARIABLE STARS
YEARS LIVING RADIOISOTOPES