24-28 October 2022
La Thanh Hotel, Hanoi, Vietnam
Asia/Ho_Chi_Minh timezone
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Deciphering the Hidden Morphology of Periodic Thermonuclear X-Ray Bursts

Speaker

Yi Hua Lam (Institute of Modern Physics, Chinese Academy of Sciences, China)

Description

Since the first detected extrasolar X-ray source of Scorpius X-1 (aka Sco X-1) by Giacconi et al. in 1962, more than 7083 Type-I X-ray bursts generated by the respective 115 bursters have been observed. Reproducing the burst light curve is the key to accurately understanding thin-shell burning in Type-I X-ray bursts, nova outbursts, and Type-Ia supernovae, and to identifying important seed nuclei for superburst and neutron-star crust cooling. Up to now, there has been no theoretical model capable of producing X-ray bursts closely conformed with an observed X-ray burst profile. Here we present the first benchmark Type-I X-ray burst model that unprecedentedly reconciles the simulated periodic burst light curve properties with the observed ones. The observed periodic bursts were generated from the GS 1826−24 burster discovered by Makino et al. in 1988. It is for the first time since its discovery that a theoretical model remarkably reproduces the observed burst fluence, recurrence time, light curve profile, conforming with the observed burst peak until tail end and revealing the morphology of periodic X-ray burst.

Please select a main topic related to your abstract Theoretical Nuclear Physics for Astrophysics

Primary authors

Yi Hua Lam (Institute of Modern Physics, Chinese Academy of Sciences, China) Ning Lu Prof. Alexander Heger (School of Physics and Astronomy, Monash University) Dr Nadezda Smirnova Dr David Kahl (School of Physics and Astronomy, University of Edinburgh / Extreme Light Infrastructure–Nuclear Physics, Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering (IFIN-HH)) Dr Adam Jacobs (Joint Institute for Nuclear Astrophysics, Michigan State University) Dr Zac Johnston (Joint Institute for Nuclear Astrophysics, Michigan State University) Zi Xin Liu Shigeru Kubono (RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan)

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