Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008head...10.1007p&link_type=abstract
American Astronomical Society, HEAD meeting #10, #10.07
Astronomy and Astrophysics
Astronomy
Scientific paper
We present a comprensive phase-coherent timing study of the most extreme accreting millisecond pulsar (AMP) XTE J1807-294 (5.2 ms spin period). This is the AMP with the strongest timing noise contamination in the post-fit timing residuals among the 10 known AMPs and shows an enigmatic linear anticorrelation between the fractional amplitude of the pulsations and the timing residuals. It also shows strong time lags, a peculiar pulse spectrum and sudden changes in the pulse profile shape not easily explained with current emission mechanism models. We compare our findings with the most stable AMP known (XTE J1751-305), where almost no timing noise in the post-fit residuals and no pulse shape variation is present. We give a tentative explaination for these differencese in behavior and introduce the use of the SigmaZ statistic to measure the timescales of the noise processes and the stability of the pulsar spin periods.
Chakrabarty Deepto
Hartman J. M. J.
Patruno Alessandro
van der Klis Michael
Wijnands Rudy
No associations
LandOfFree
Timing of the Accreting Millisecond Pulsars: The Strange Case of XTE J1807-294 and XTE J1751-305 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 Timing of the Accreting Millisecond Pulsars: The Strange Case of XTE J1807-294 and XTE J1751-305, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Timing of the Accreting Millisecond Pulsars: The Strange Case of XTE J1807-294 and XTE J1751-305 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-958097