A new 17F(p, γ)18Ne reaction rate and its implications for nova nucleosynthesis

S. Parete-Koon, W. R. Hix, M. S. Smith, Sumner Starrfield, D. W. Bardayan, M. W. Guidry, A. Mezzacappa

Research output: Contribution to journalArticle

23 Scopus citations

Abstract

Proton capture by 17F plays an important role in the synthesis of nuclei in nova explosions. A revised rate for this reaction, based on a measurement of the 1H(17F, p)17F excitation function using a radioactive 17F beam at Oak Ridge National Laboratory's Holifield Radioactive Ion Beam Facility, is used to calculate the nucleosynthesis in nova outbursts on the surfaces of 1.25 and 1.35 M · ONeMg white dwarfs and a 1.00 M· CO white dwarf. We find that the new 17F (p, γ)18Ne reaction rate changes the abundances of some nuclides (e.g., 17O) synthesized in the hottest zones of an explosion on a 1.35 M· white dwarf by more than a factor of 104 compared to calculations using some previous estimates for this reaction rate, and by more than a factor of 3 when the entire exploding envelope is considered. In a 1.25 M· white dwarf nova explosion, this new rate changes the abundances of some nuclides synthesized in the hottest zones by more than a factor of 600, and by more than a factor of 2 when the entire exploding envelope is considered. Calculations for the 1.00 M· white dwarf nova show that this new rate changes the abundance of 18Ne by 21% but has negligible effect on all other nuclides. Comparison of model predictions with observations is also discussed.

Original languageEnglish (US)
Pages (from-to)1239-1245
Number of pages7
JournalAstrophysical Journal
Volume598
Issue number2 I
DOIs
StatePublished - Dec 1 2003

Keywords

  • Novae, cataclysmic variables
  • Nuclear reactions, nucleosynthesis, abundances

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Parete-Koon, S., Hix, W. R., Smith, M. S., Starrfield, S., Bardayan, D. W., Guidry, M. W., & Mezzacappa, A. (2003). A new 17F(p, γ)18Ne reaction rate and its implications for nova nucleosynthesis. Astrophysical Journal, 598(2 I), 1239-1245. https://doi.org/10.1086/378979