The periodic bursters XB1323-619 and GS1826-24: longterm evolution of the nuclear burning regime and comparison with theory

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dc.creatorBalucinska-Church, M.
dc.creatorReed, D.
dc.creatorChurch, M. J.
dc.date2007-10-22
dc.date.accessioned2026-07-07T08:37:45Z
dc.date.available2026-07-07T08:37:45Z
dc.descriptionThe majority of X-ray burst sources do not display a burst rate that increases with luminosity as expected, but this is seen in the two clocked bursters XB1323-619 and GS1826-24. We present a detailed investigation of these two sources which in the case of the first source, spans 18 years. Based on measurements of the burst rate, X-ray luminosity, the alpha-parameter and the two time constants generally present in the burst decays, we demonstrate the importance of the rp nuclear burning process. A detailed comparison with theory shows that although the burst rate in each source agrees well with the theoretical value, there is a difference of more than a factor of 5 in the burst rate at a given luminosity between the sources. We show that the main reason for this is that the two sources have substantially different emitting areas on the neutron star in non-burst emission, a factor often neglected. Variation of this area may explain the inverse relation of burst rate with luminosity in the majority of burst sources.
dc.descriptionFrascati Workshop 2007 "Multifrequency behaviour of high energy cosmic sources"; ChJAA in press (6 pages, 5 figures)
dc.identifierhttps://arxiv.org/abs/0710.4065
dc.identifierhttp://arxiv.org/abs/0710.4065
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/140509
dc.subjectAstrophysics
dc.titleThe periodic bursters XB1323-619 and GS1826-24: longterm evolution of the nuclear burning regime and comparison with theory
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