Thermal limit cycle oscillations on the surface of accreting neutron stars X-ray bursters

Details Thermal limit cycle oscillations on the surface of accreting neutron stars X-ray bursters Thermal limit cycle oscillations on the surface of accreting neutron stars X-ray bursters

Dec 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...242.1226b&link_type=abstract

Astrophysical Journal, Part 1, vol. 242, Dec. 15, 1980, p. 1226-1231.

Astronomy and Astrophysics

Astrophysics

15

Astronomical Models, Neutron Stars, Stellar Envelopes, Stellar Mass Accretion, Stellar Oscillations, X Ray Sources, Bursts, Helium, Hydrogen, Pulsed Radiation, Stellar Evolution, Stellar Temperature, Surface Layers, Time Dependence

Scientific paper

A very simple two-zone model is used to 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. It is suggested 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.

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