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High-Energy Transients: Thermonuclear (Type-I) X-Ray Bursts

Invited talk

Published online by Cambridge University Press:  29 August 2019

D. K. Galloway ,
Z. Johnston ,
A. Goodwin  and
A. Heger
D. K. Galloway*
Affiliation:
School of Physics & Astronomy, Monash University, Melbourne, Australia Monash Centre for Astrophysics (MoCA), Monash University, Melbourne, Australia
Z. Johnston
Affiliation:
School of Physics & Astronomy, Monash University, Melbourne, Australia Monash Centre for Astrophysics (MoCA), Monash University, Melbourne, Australia
A. Goodwin
Affiliation:
School of Physics & Astronomy, Monash University, Melbourne, Australia Monash Centre for Astrophysics (MoCA), Monash University, Melbourne, Australia
A. Heger
Affiliation:
School of Physics & Astronomy, Monash University, Melbourne, Australia Monash Centre for Astrophysics (MoCA), Monash University, Melbourne, Australia Tsung-Dao Lee Institute, Shanghai, China
*
email: duncan.galloway@monash.edu
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Abstract

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Many distinct classes of high-energy variability have been observed in astrophysical sources, and over a range of time-scales. The widest range, spanning microseconds to decades, is found in accreting, compact, stellar-mass objects, including neutron stars and black holes. Neutron stars are of particular observational interest as they exhibit surface effects giving rise to phenomena – such as thermonuclear bursts and pulsations – not seen in black holes.

This talk reviewed briefly the present understanding of thermonuclear (Type-I) X-ray bursts – events that are powered by an extensive chain of nuclear reactions which in many cases are unique to the environments. Thermonuclear bursts have been exploited over the last few years as an avenue to measure a neutron star’s mass and radius, although the contribution of systematic errors to the measurements remains contentious. We described recent efforts to match burst models to observations better, with a view to resolving some of the astrophysical uncertainties relating to those events. Our efforts have good prospects for providing information that is complementary to nuclear experiments.

Keywords

Stars: neutronX-rays: burstsnuclear reactions
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S339: Southern Horizons in Time-Domain Astronomy , November 2017 , pp. 121 - 126
Copyright
© International Astronomical Union 2019 

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