https://doi.org/10.1051/epjconf/202226005002
Effects of Nuclear Equation of State on Type-I X-ray Bursts and Implication for Clocked Burster GS 1826–24
1 Department of Physics, Kyushu University, Fukuoka 819-0395, Japan
2 Interdisciplinary Theoretical and Mathematical Sciences Program (iTHEMS), RIKEN, Wako, Saitama 351-0198, Japan
3 Astrophysical Big Bang Laboratory, CPR, RIKEN, Wako, Saitama 351-0198, Japan
4 RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
5 Department of Education and Creation Engineering, Kurume Institute of Technology, Kurume, Fukuoka 830-0052, Japan
* e-mail: dohi@phys.kyushu-u.ac.jp
Published online: 24 February 2022
We study the effects of nuclear equation of state (EOS) on Type-I X-ray bursts, focusing on the Clocked burster GS 1826–24. According to the shell-flush model, the surface gravity of the neutron stars (NSs) strengthens burst activities, where the recurrence time and peak luminosity are higher for larger-radius EOSs. We show that such a prediction matches with the full multi-zone model, in which whole NS regions are considered in burst calculation. We also show that the large-radius EOSs are not preferred to account for the observed light curves of GS 1826–24.
© The Authors, published by EDP Sciences, 2022
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