Thermonuclear X-ray bursts from neutron star LMXBs - iucaa

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Various aspects of burstsFast Timing Properties of X-ray Bursts (Burst Oscillations)What are burst oscillations?These are millisecond period variationsof observed intensity during thermonuclearX-ray bursts.What is their origin?Asymmetric brightness pattern on thespinning neutron star surfaces.Neutron star spin frequency= Burst oscillation frequencyBurst light curveHot spotXTE J1814-338(RXTE-PCA data)Spinning neutron star Bhattacharyya et al. (2005)The vertical dashed linegives the lower limit of thestellar radius-to-mass ratiowith 90% confidence.
Various aspects of burstsUnusually frequent burstsPlausible explanations:(1) Successive bursts from layersof accumulated accretedmatter?(2) Burning temporarily stalled bywaiting points in the chain ofnuclear reactions?Keek et al. (2010)Either of them will be importantfor nuclear physics.These frequent bursts are not observed from short period binaries.This implies that hydrogen burning processes play a crucial role forthese bursts.
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Page 4 and 5: IntroductionNeutron Star: Surface a
Page 6: IntroductionLow-mass X-ray Binary (
Page 9 and 10: Thermonuclear X-ray Bursts(4) At hi
Page 11: Various aspects of burstsContinuum
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Page 18 and 19: Various aspects of burstsASTROSAT(I
Page 22: Importance of burstsNuclear physics

Thermonuclear X-ray bursts from neutron star LMXBs - iucaa

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