6533b857fe1ef96bd12b3a38
RESEARCH PRODUCT
Measuring the spin up of the Accreting Millisecond Pulsar XTE J1751-305
M. T. MennaAlessandro PapittoAlessandro RiggioT. Di SalvoLuciano Burderisubject
Physicspulsars: general pulsars: individual: XTE J1751-305 stars: magnetic fields stars: neutron X-rays: binariesAstrophysics::High Energy Astrophysical PhenomenaAstrophysics (astro-ph)Phase (waves)Static timing analysisFluxFOS: Physical sciencesAstronomy and AstrophysicsAstrophysicsAstrophysicssymbols.namesakeNeutron starSettore FIS/05 - Astronomia E AstrofisicaSpace and Planetary ScienceMillisecond pulsarOrbital motionsymbolsDoppler effectSpin-½description
We perform a timing analysis on RXTE data of the accreting millisecond pulsar XTE J1751-305 observed during the April 2002 outburst. After having corrected for Doppler effects on the pulse phases due to the orbital motion of the source, we performed a timing analysis on the phase delays, which gives, for the first time for this source, an estimate of the average spin frequency derivative = (3.7 +/- 1.0)E-13 Hz/s. We discuss the torque resulting from the spin-up of the neutron star deriving a dynamical estimate of the mass accretion rate and comparing it with the one obtained from X-ray flux. Constraints on the distance to the source are discussed, leading to a lower limit of \sim 6.7 kpc.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2007-10-05 |