Testing the rotating hotspot model using X-ray burst oscillations from 4U 1636−536

@article{Artigue2013TestingTR,
  title={Testing the rotating hotspot model using X-ray burst oscillations from 4U 1636−536},
  author={Romain Artigue and Didier Barret and Frederick K. Lamb and Ka Ho Lo and M. Coleman Miller},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2013},
  volume={433}
}
Precise and accurate measurements of neutron star masses and radii would provide valuable information about the still uncertain properties of cold matter at supranuclear densities. One promising approach to making such measurements involves an analysis of the X-ray flux oscillations often seen during thermonuclear (type 1) X-ray bursts. These oscillations are almost certainly produced by emission from hotter regions on the stellar surface modulated by the rotation of the star. One consequence… 

Figures and Tables from this paper

Thermonuclear X-ray bursts from 4U 1636 − 536  observed with AstroSat

We report results obtained from the study of 12 thermonuclear X-ray bursts in six AstroSat observations of a neutron star X-ray binary and well-known X-ray burster, 4U 1636 − 536. Burst

DETERMINING NEUTRON STAR MASSES AND RADII USING ENERGY-RESOLVED WAVEFORMS OF X-RAY BURST OSCILLATIONS

Simultaneous, precise measurements of the mass M and radius R of neutron stars can yield uniquely valuable information about the still uncertain properties of cold matter at several times the density

Kilohertz QPOs in low-mass X-ray binaries as oscillation modes of tori around neutron stars - I

There have been many efforts to explain the dynamical mechanisms behind the phenomenology of quasi-periodic oscillations (QPOs) seen in the X-ray light curves of low-mass X-ray binaries. Up to now,

Thermonuclear X-ray Bursts

  • D. GallowayL. Keek
  • Physics
    Timing Neutron Stars: Pulsations, Oscillations and Explosions
  • 2020
Type-I X-ray bursts arise from unstable thermonuclear burning of accreted fuel on the surface of neutron stars. In this chapter we review the fundamental physics of the burning processes, and

NuSTAR DETECTION OF HARD X-RAY PHASE LAGS FROM THE ACCRETING PULSAR GS 0834−430

The Nuclear Spectroscopic Telescope Array hard X-ray telescope observed the transient Be/X-ray binary GS 0834−430 during its 2012 outburst—the first active state of this system observed in the past

Determining Neutron Star Properties by Fitting Oblate-Star Waveforms To X-ray Burst Oscillations

We describe sophisticated new Bayesian analysis methods that make it possible to estimate quickly the masses and radii of rapidly rotating, oblate neutron stars by fitting oblate-star waveform models

NEUTRON STAR MASS–RADIUS CONSTRAINTS USING EVOLUTIONARY OPTIMIZATION

The equation of state of cold supra-nuclear-density matter, such as in neutron stars, is an open question in astrophysics. A promising method for constraining the neutron star equation of state is

Time- and Energy-dependent Characteristics of Thermonuclear Burst Oscillations

We have investigated temporal and spectral properties of a large sample of thermonuclear bursts with oscillations from eight different sources with spin frequencies varying from 270 to 620 Hz. For

Numerical Experiments for Nuclear Flashes toward Superbursts in an Accreting Neutron Star

We show that the superburst would be originated from thermonuclear burning ignited by accumulated fuels in the deep layers compared to normal X-ray bursts. Two cases are investigated for models

Constraining the Neutron Star Mass–Radius Relation and Dense Matter Equation of State with NICER. II. Emission from Hot Spots on a Rapidly Rotating Neutron Star

We describe the model of surface emission from a rapidly rotating neutron star that is applied to Neutron Star Interior Composition Explorer X-ray data of millisecond pulsars in order to

References

SHOWING 1-10 OF 26 REFERENCES

Bounds on Compactness for Low-Mass X-Ray Binary Neutron Stars from X-Ray Burst Oscillations

We have modeled X-ray burst oscillations observed with the Rossi X-Ray Timing Explorer from two low-mass X-ray binaries (LMXB): 4U 1636-53 with a frequency of 580 Hz and 4U 1728-34 at a frequency of

Oscillation Waveforms and Amplitudes from Hot Spots on Neutron Stars

The discovery of high-amplitude brightness oscillations during type I X-ray bursts from six low-mass X-ray binaries has provided a powerful new tool to study the properties of matter at supranuclear

Evidence for a Millisecond Pulsar in 4U 1636-53 during a Superburst

We report the discovery with the Proportional Counter Array on board the Rossi X-Ray Timing Explorer of highly coherent 582 Hz pulsations during the 2001 February 22 (UT) "superburst" from 4U

Millisecond X-Ray Variability from an Accreting Neutron Star System

We report the detection with the Proportional Counter Array (PCA) on board the Rossi X-Ray Timing Explorer (RXTE) of millisecond variability in the X-ray emission from the low-mass X-ray binary 4U

THE ENERGY DEPENDENCE OF MILLISECOND OSCILLATIONS IN THERMONUCLEAR X-RAY BURSTS

We examine the energy-resolved pulse profiles of 51 flux oscillations observed during the declines of thermonuclear X-ray bursts from accreting weakly magnetized neutron stars with the Rossi X-Ray

Thermonuclear Burst Oscillations

Burst oscillations, a phenomenon observed in a significant fraction of Type I (thermonuclear) X-ray bursts, involve the development of highly asymmetric brightness patches in the burning surface

On the Frequency Evolution of X-Ray Brightness Oscillations during Thermonuclear X-Ray Bursts: Evidence of Coherent Oscillations

We investigate the time dependence of the frequency of X-ray brightness oscillations during thermonuclear X-ray bursts from several neutron star low-mass X-ray binaries. We find that the oscillation

ORIGIN OF INTERMITTENT ACCRETION-POWERED X-RAY OSCILLATIONS IN NEUTRON STARS WITH MILLISECOND SPIN PERIODS

We have shown previously that many of the properties of persistent accretion-powered millisecond pulsars can be understood if their X-ray emitting areas are near their spin axes and move as the

Lag of Low-Energy Photons in an X-Ray Burst Oscillation: Doppler Delays

Numerous X-ray bursts show strong oscillations in their flux at several hundred hertz as revealed by Rossi X-Ray Timing Explorer. Analyzing one such oscillation from the X-ray binary Aquila X-1, I

Constraints on Neutron Star Parameters from Burst Oscillation Light Curves of the Accreting Millisecond Pulsar XTE J1814-338

Detailed modeling of the millisecond brightness oscillations during thermonuclear bursts from low-mass X-ray binaries can provide important information about neutron star structure. Until now, the