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Effects of rare isotope reaction rates on the light curve of an X-ray burst

Title
Effects of rare isotope reaction rates on the light curve of an X-ray burst
Authors
Park B.Kwaky K.Chae K.Y.Kim A.
Ewha Authors
김아람
SCOPUS Author ID
김아람scopus
Issue Date
2016
Journal Title
New Physics: Sae Mulli
ISSN
0374-4914JCR Link
Citation
vol. 66, no. 12, pp. 1524 - 1529
Keywords
15O(αγ)19Ne18Ne(αρ)21NaNuclear astrophysicsStellar evolution codeTriple alphaX-ray bursts
Publisher
Korean Physical Society
Indexed
SCOPUS; KCI scopus
Abstract
X-ray bursts (XRBs) have been thought to occur via thermonuclear runaway reactions on the surface of a neutron star. The runaway reactions are affected by both the properties of the accreted material, such as the accretion rate and the composition, and the reaction rates of participating nuclei. We investigate how the shape of the XRB light curve changes with specific reaction rates. As a case study, we choose three reaction rates, triple alpha, 18Ne(α; ρ)21Na, and 15O(α; γ)19Ne. We find that the shape of the light curve does change with different reaction rates for the same reaction, but the predicted light curves with 54 isotopes do not match the observed ones even when the variations within the different reaction rates are considered. We confirm that the shape of the light curve is more sensitive to the number of isotopes that participate in the runaway reactions.
DOI
10.3938/NPSM.66.1524
Appears in Collections:
사범대학 > 과학교육과 > Journal papers
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