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X-Ray Burst Sources - A Simple Two Zone Model

Published online by Cambridge University Press:  12 April 2016

J. Robert Buchler ,
Manuel Barranco  and
Mario Livio
J. Robert Buchler
Affiliation:
Department of Physics, University of Florida
Manuel Barranco
Affiliation:
Department of Physics, University of Florida
Mario Livio
Affiliation:
Department of Physics and Astronomy, University of Florida and Tel-Aviv University, Ramat-Aviv

Abstract

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With the help of a very simple two zone model, we demonstrate the possibility of periodic thermal relaxation (limit cycle) oscillations in the helium burning envelope of accreting neutron stars. Physically reasonable model parameters can be chosen which yield agreement with the observed features of x-ray bursts and we suggest that this limit cycle is operative in neutron stars which have an accretion rate in a specific range. For hydrogen burning a similar cycle is possible, but it operates at such high temperatures that an unrealistically large accretion rate would be required.

Type
IX. Supernovae
Information
International Astronomical Union Colloquium , Volume 58: Stellar Hydrodynamics , August 1980 , pp. 585 - 590
Copyright
Copyright © Reidel 1980

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