Timing of the 2008 Outburst of SAX J1808.4-3658 with XMM-Newton: A Stable Orbital Period Derivative over Ten Years

Abstract

We report on a timing analysis performed on a 62-ks long XMM-Newton observation of the accreting millisecond pulsar SAX J1808.4-3658 during the latest X-ray outburst that started on September 21, 2008. By connecting the time of arrivals of the pulses observed during the XMM observation, we derived the best-fit orbital solution and a best-fit value of the spin period for the 2008 outburst. Comparing this new set of orbital parameters and, in particular, the value of the time of ascending-node passage with the orbital parameters derived for the previous four X-ray outbursts of SAX J1808.4-3658 observed by the PCA on board RXTE, we find an updated value of the orbital period derivative, which turns out to be ${\dot{P}}_{\mathrm{orb}}=(3.89\pm 0.15)\times 10^{-12}$ s/s. This new value of the orbital period derivative agrees with the previously reported value, demonstrating that the orbital period derivative in this source has remained stable over the past ten years. Although this timespan is not sufficient yet for confirming the secular evolution of the system, we again propose an explanation of this behavior in terms of a highly non-conservative mass transfer in this system, where the accreted mass (as derived from the X-ray luminosity during outbursts) accounts for a mere 1% of the mass lost by the companion.

arXiv comment4 pages, 3 figures. Final version, including editing corrections, to appear on A&A Letters

References in corpus (10)

• Theory of Low-Mass Stars and Substellar Objects
• The long-term evolution of the spin, pulse shape, and orbit of the accretion-powered millisecond pulsar SAX J1808.4-3658
• Helium-rich thermonuclear bursts and the distance to the accretion-powered millisecond pulsar SAX J1808.4-3658
• Orbital Variability in the Eclipsing Pulsar Binary PSR B1957+20
• XMM-Newton detects a relativistically broadened iron line in the spectrum of the ms X-ray pulsar SAX J1808.4-3658
• Orbital Evolution of an Accreting Millisecond Pulsar: Witnessing the Banquet of a Hidden Black Widow?
• Order in the Chaos: Spin-up and Spin-down during the 2002 Outburst of SAX J1808.4-3658
• Optical Observations of SAX J1808.4-3658 During Quiescence
• The optical counterpart of SAX J1808.4-3658, the transient bursting millisecond X-ray pulsar
• Orbital variability of the PSR J2051-0827 Binary System

Cited by in corpus (43)

• Strange star equation of state fits the refined mass measurement of 12 pulsars and predicts their radii
• A decade of timing an accretion-powered millisecond pulsar: The continuing spin down and orbital evolution of SAX J1808.4-3658
• Accreting Millisecond X-Ray Pulsars
• 1 Hz flaring in SAX J1808.4--3658: flow instabilities near the propeller stage
• Galactic Ultracompact X-ray Binaries: Disk Stability and Evolution
• Accelerated Orbital Expansion And Secular Spin Down of the Accreting Millisecond Pulsar SAX J1808.4-3658
• The accretion flow to the intermittent accreting ms pulsar, HETE J1900.1-2455, as observed by XMM-Newton and RXTE
• Spin frequency distributions of binary millisecond pulsars
• Spin down during quiescence of the fastest known accretion-powered pulsar
• Multiband Studies of the Optical Periodic Modulation in the X-Ray Binary SAX~J1808.4-3658 during Its Quiescence and 2008 Outburst
• On the timing properties of SAX J1808.4-3658 during its 2015 outburst
• Timing of the accreting millisecond pulsar SAX J1748.9-2021 during its 2015 outburst
• NuSTAR and XMM-Newton broad-band spectrum of SAX J1808.4-3658 during its latest outburst in 2015
• Discovery of a new accreting millisecond X-ray pulsar in the globular cluster NGC 2808
• Accreting pulsars: mixing-up accretion phases in transitional systems
• Radio pulse search and X-Ray monitoring of SAX J1808.4-3658: What Causes its Orbital Evolution?
• Spectral and timing properties of IGR J00291+5934 during its 2015 outburst
• Formation of the planet around the millisecond pulsar J1719-1438
• Secular spin-down of the AMP XTE J1751-305
• Indications of non-conservative mass-transfer in AMXPs
• The Quasi-Roche lobe overflow state in the evolution of Close Binary Systems containing a radio pulsar
• A possible solution of the puzzling variation of the orbital period of MXB 1659-298
• Timing the pulsations of the accreting millisecond pulsar SAX J1808.4-3658 during its 2019 outburst
• Varying disc-magnetosphere coupling as the origin of pulse profile variability in SAX J1808.4-3658
• Search for pulsations at high radio frequencies from accreting millisecond X-ray pulsars in quiescence
• SWIFT J1756.9-2508: spectral and timing properties of its 2018 outburst
• Non-conservative mass transfer in stellar evolution and the case of V404 Cyg/GS 2023+338
• SAX J1808.4-3658, an accreting millisecond pulsar shining in gamma rays?
• Long-term coherent timing of the accreting millisecond pulsar IGR J17062-6143
• Outflows and spectral evolution in the eclipsing AMXP SWIFT J1749.4-2807 with NICER, XMM-Newton and NuSTAR
• Timing analysis of the 2022 outburst of the accreting millisecond X-ray pulsar SAX J1808.4$-$3658: hints of an orbital shrinking
• The Slow Orbital Evolution of the Accreting Millisecond Pulsar IGR J0029+5934
• The AstroSat observation of accreting millisecond X-ray pulsar SAX J1808.4-3658 during its 2019 outburst
• An evolutionary channel towards the accreting millisecond pulsar SAX J1808.4-3658
• On the 2018 outburst of the accreting millisecond X-ray pulsar Swift J1756.9-2508 as seen with NICER
• Evidence of a non-conservative mass transfer for XTE J0929-314
• Sample of LMXBs in the Galactic bulge. I. Optical and near-infrared constraints from the Virtual Observatory
• On the peculiar long-term orbital evolution of the eclipsing accreting millisecond X-ray pulsar SWIFT J1749.4-2807
• Rapid orbital expansion in millisecond pulsar PSR J0636+5128: evaporation winds?
• Broad-band X-ray spectral and timing properties of the accreting millisecond X-ray pulsar IGR J17498$-$2921 during the 2023 outburst
• Investigation of the Millisecond Pulsar Origins by their Spin Periods at the Wavebands of Radio, X-Ray, and γ-Ray
• Updated Orbital Ephemeris and Detection of Superhump Modulation in X-ray Band for the Ultra-Compact Low Mass X-ray Binary 4U 1820-30
• The 2025 outburst of IGR J17511-3057: timing and spectral insights from NICER and NuSTAR