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곽규진

Kwak, Kyujin
Computational Astrophysics Lab.
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Effects of rare isotope reaction rates on the light curve of an X-ray burst

Alternative Title
희귀동위원소 핵반응에 따른 엑스선폭발 광도곡선 변화
Author(s)
Park, ByeongchanKwak, KyujinChae, Kyung YukKim, Aram
Issued Date
2016-12
DOI
10.3938/NPSM.66.1524
URI
https://scholarworks.unist.ac.kr/handle/201301/21232
Fulltext
http://www.npsm-kps.org/journal/view.html?volume=66&number=12&spage=1524&year=2016
Citation
NEW PHYSICS: SAE MULLI, v.66, no.12, pp.1524 - 1529
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
Publisher
Korean Physical Society
ISSN
0374-4914

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