Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aipc.1357..151r&link_type=abstract
RADIO PULSARS: AN ASTROPHYSICAL KEY TO UNLOCK THE SECRETS OF THE UNIVERSE. AIP Conference Proceedings, Volume 1357, pp. 151-154
Astronomy and Astrophysics
Astronomy
1
Time Series, Magnetic Fields, Radioastronomy, Oscillations, Time Series Analysis, Time Variability, Gravitational Radiation, Magnetic Fields, And Other Observations, Radio, Microwave, Pulsations, Oscillations, And Stellar Seismology
Scientific paper
Observational evidences of erratic 1st harmonic pulse phase shifts in accreting millisecond X-ray pulsars pulse phase evolution was reported by several authors. This effect always go together with much more stable 2nd harmonics pulse phase delays. Different possible explanations of these phase shifts have been given in literature. But all these interpretations do not explain why the 2nd harmonic are more stable than the 1st harmonic. The explanation of such a behaviour is of fundamental importance in order to gain an insight on the NS rotational behaviour and to remove the still present interpretative ambiguity on the results of timing analysis. We propose a simple toy-model to interpret these phenomena as effect of small variations of the ratio between the fluxes from the two hot-spots. We show how it affects the phase of the overall pulse profile, when the two amplitudes are similar and the two hot-spots are not perfectly antipodal. Using this model, we give a detailed explanation of the phase jump observed in the 2002 outburst of SAX J1808.4-3658.
Burderi Luciano
di Salvo Tiziana
Papitto Alessandro
Riggio Alessandro
No associations
LandOfFree
A model to interpret pulse phase shifts in AMXPs: SAX J1808.4-3658 as a proof of concept does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A model to interpret pulse phase shifts in AMXPs: SAX J1808.4-3658 as a proof of concept, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A model to interpret pulse phase shifts in AMXPs: SAX J1808.4-3658 as a proof of concept will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1738331