Probing neutron star structure with a newly discovered regular X-ray burster

Paper Title:

Constraints on the Neutron-Star Structure from the Clocked X-Ray Burster 1RXS J180408.9$-$342058

Published on:

6 November 2023

Primary Category:

High Energy Astrophysical Phenomena

Paper Authors:

Akira Dohi,

Wataru Iwakiri,

Nobuya Nishimura,

Tsuneo Noda,

Shigehiro Nagataki,

Masa-aki Hashimoto

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Key Details

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1RXS J180408.9-342058 is a newly discovered 'clocked' X-ray burster, with very regular burst intervals

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Numerical models of type I X-ray bursts were calculated for different neutron star masses, radii, and equations of state

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The observed recurrence times and flux ratios between epochs favor low neutron star mass <1.7 solar masses

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Stiffer equations of state with radii >12.7 km are preferred for 1.4 solar mass models

Explore the topics in this paper

equations of state

mass models

neutron stars

x-ray astronomy

x-ray bursters

AI generated summary

Probing neutron star structure with a newly discovered regular X-ray burster

This paper models the newly discovered 'clocked' X-ray burster 1RXS J180408.9-342058. By comparing models to the observed regular burst intervals and flux ratios, constraints are placed on the neutron star mass, radius, and nuclear equation of state. The observations imply a low neutron star mass <1.7 solar masses, and favor stiffer equations of state with radii >12.7 km for 1.4 solar mass models.