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Title: 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

Abstract

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.

Authors:
;  [1];  [2]
  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)
Publication Date:
OSTI Identifier:
21455142
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 718; Journal Issue: 1; Other Information: DOI: 10.1088/0004-637X/718/1/357; Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ABUNDANCE; ALPHA REACTIONS; ALUMINIUM 26; CARBON 12; CARBON 12 TARGET; EXPLOSIONS; GAMMA RADIATION; HELIUM BURNING; IRON 60; NUCLEOSYNTHESIS; OXYGEN 16; REACTION KINETICS; STAR EVOLUTION; SUPERNOVAE; TITANIUM 44; ALUMINIUM ISOTOPES; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; BETA-PLUS DECAY RADIOISOTOPES; BINARY STARS; CARBON ISOTOPES; CHARGED-PARTICLE REACTIONS; ELECTROMAGNETIC RADIATION; ELECTRON CAPTURE RADIOISOTOPES; ERUPTIVE VARIABLE STARS; EVEN-EVEN NUCLEI; EVOLUTION; INTERMEDIATE MASS NUCLEI; IONIZING RADIATIONS; IRON ISOTOPES; ISOTOPES; KINETICS; LIGHT NUCLEI; NUCLEAR REACTIONS; NUCLEI; ODD-ODD NUCLEI; OXYGEN ISOTOPES; RADIATIONS; RADIOISOTOPES; SECONDS LIVING RADIOISOTOPES; STABLE ISOTOPES; STAR BURNING; STARS; SYNTHESIS; TARGETS; TITANIUM ISOTOPES; VARIABLE STARS; YEARS LIVING RADIOISOTOPES

Citation Formats

Tur, Clarisse, Austin, Sam M., and Heger, Alexander, E-mail: tur@nscl.msu.ed, E-mail: austin@nscl.msu.ed, E-mail: alex@physics.umn.ed. 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. United States: N. p., 2010. Web. doi:10.1088/0004-637X/718/1/357.
Tur, Clarisse, Austin, Sam M., & Heger, Alexander, E-mail: tur@nscl.msu.ed, E-mail: austin@nscl.msu.ed, E-mail: alex@physics.umn.ed. 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. United States. doi:10.1088/0004-637X/718/1/357.
Tur, Clarisse, Austin, Sam M., and Heger, Alexander, E-mail: tur@nscl.msu.ed, E-mail: austin@nscl.msu.ed, E-mail: alex@physics.umn.ed. Tue . "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". United States. doi:10.1088/0004-637X/718/1/357.
@article{osti_21455142,
title = {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},
author = {Tur, Clarisse and Austin, Sam M. and Heger, Alexander, E-mail: tur@nscl.msu.ed, E-mail: austin@nscl.msu.ed, E-mail: alex@physics.umn.ed},
abstractNote = {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.},
doi = {10.1088/0004-637X/718/1/357},
journal = {Astrophysical Journal},
issn = {0004-637X},
number = 1,
volume = 718,
place = {United States},
year = {2010},
month = {7}
}