Sensitivity of X-ray burst models to uncertainties in nuclear processes

Karl Smith, A. Matthew Amthor, Richard Cyburt, Ryan Ferguson, Alexander Heger, Emily Johnson, Matthew Klein, Zachary Meisel, Thomas Rauscher, Alexander Sakharuk, Friedrich K. Tielemann, Hendrik Schatz, Scott Warren, Michael Wiescher

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1 Citation (Scopus)

Abstract

The underlying nuclear reaction sequence in Type I X-ray bursts is the rp-process. We examine the sensitivity of current X-ray burst models to uncertainties in nuclear reaction rates in terms of predicted X-ray light curves and final produced ashes. Many of the relevant reaction rates have significantly large uncertainties that impact the results of X-ray burst models. We used an updated nuclear reaction network and ran almost 400,000 simulations with a single-zone X-ray burst model to determine the influence of individual reaction rate variations. We also explored the validity of single-zone approximations as tools to investigate nuclear physics by comparing to a full 1-D multi-zone model. We show that a properly calibrated single-zone model can save computation time and give similar results to multi-zone models. Using the calibrated singlezone model we identify the most significant reaction in the X-ray burst.

Original languageEnglish
Title of host publicationProceedings of Science
Subtitle of host publication10th Symposium on Nuclei in the Cosmos, NIC 2008; Mackinac Island, MI; United States; 27 July 2008 through 1 August 2008
Publication statusPublished - 1 Dec 2008
Externally publishedYes
Event10th Symposium on Nuclei in the Cosmos, NIC 2008 - Mackinac Island, MI, United States of America
Duration: 27 Jul 20081 Aug 2008

Publication series

NameProceedings of Science
PublisherScuola Internazionale Superiore di Studi Avanzati (S I S S A)
ISSN (Print)1824-8039

Conference

Conference10th Symposium on Nuclei in the Cosmos, NIC 2008
CountryUnited States of America
CityMackinac Island, MI
Period27/07/081/08/08

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