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Title: Neutron stars as X-ray burst sources. II. Burst energy histograms and why they burst

Abstract

In this work we explore some of the implications of a model for X-ray burst sources where bursts are caused by Kruskal-Schwarzschild instabilities at the magnetopause of an accreting and rotating neutron star. A number of simplifying assumptions are made in order to test the model using observed burst-energy histograms for the rapid burster MXB 1730--335. The predicted histograms have a correct general shape, but it appears that other effects are important as well, and that mode competition, for instance, may suppress the histograms at high burst energies. An explanation is ventured for the enhancement in the histogram at the highest burst energies, which produces the bimodal shape in high accretion rate histograms. Quantitative criteria are given for deciding when accreting neutron stars are steady sources or burst sources, and these criteria are tested using the X-ray pulsars.

Authors:
Publication Date:
Research Org.:
Institute for Advanced Study
OSTI Identifier:
6271947
Resource Type:
Journal Article
Journal Name:
Astrophys. J.; (United States)
Additional Journal Information:
Journal Volume: 227:3
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COSMIC X-RAY SOURCES; NEUTRON STARS; STAR MODELS; INSTABILITY; MAGNETIC FIELDS; PLASMA; PULSARS; ROTATION; STAR ACCRETION; STELLAR MAGNETOSPHERES; ATMOSPHERES; COSMIC RADIO SOURCES; COSMIC RAY SOURCES; MATHEMATICAL MODELS; MOTION; STAR EVOLUTION; STARS; STELLAR ATMOSPHERES; 640103* - Astrophysics & Cosmology- Quasi-Stellar, Radio, & X-Ray Sources- (-1987); 640102 - Astrophysics & Cosmology- Stars & Quasi-Stellar, Radio & X-Ray Sources

Citation Formats

Baan, W.A. Neutron stars as X-ray burst sources. II. Burst energy histograms and why they burst. United States: N. p., 1979. Web. doi:10.1086/156807.
Baan, W.A. Neutron stars as X-ray burst sources. II. Burst energy histograms and why they burst. United States. doi:10.1086/156807.
Baan, W.A. Thu . "Neutron stars as X-ray burst sources. II. Burst energy histograms and why they burst". United States. doi:10.1086/156807.
@article{osti_6271947,
title = {Neutron stars as X-ray burst sources. II. Burst energy histograms and why they burst},
author = {Baan, W.A.},
abstractNote = {In this work we explore some of the implications of a model for X-ray burst sources where bursts are caused by Kruskal-Schwarzschild instabilities at the magnetopause of an accreting and rotating neutron star. A number of simplifying assumptions are made in order to test the model using observed burst-energy histograms for the rapid burster MXB 1730--335. The predicted histograms have a correct general shape, but it appears that other effects are important as well, and that mode competition, for instance, may suppress the histograms at high burst energies. An explanation is ventured for the enhancement in the histogram at the highest burst energies, which produces the bimodal shape in high accretion rate histograms. Quantitative criteria are given for deciding when accreting neutron stars are steady sources or burst sources, and these criteria are tested using the X-ray pulsars.},
doi = {10.1086/156807},
journal = {Astrophys. J.; (United States)},
number = ,
volume = 227:3,
place = {United States},
year = {1979},
month = {2}
}