PSR B1828-11: a precession pulsar torqued by a quark planet?

Abstract

The pulsar PSR B1828-11 has long-term, highly periodic and correlated variations in both pulse shape and the rate of slow-down. This phenomenon may provide evidence for precession of the pulsar as suggested previously within the framework of free precession as well as forced one. On a presumption of forced precession, we propose a quark planet model to this precession henomenon instead, in which the pulsar is torqued by a quark planet. We construct this model by constraining mass of the pulsar ($M_{\mathrm{psr}}$), mass of the planet ($M_{\mathrm{pl}}$) and orbital radius of the planet ($r_{\mathrm{pl}}$). Five aspects are considered: derived relation between $M_{\mathrm{psr}}$ and $r_{\mathrm{pl}}$, movement of the pulsar around the center of mass, ratio of $M_{\mathrm{psr}}$ and $M_{\mathrm{pl}}$, gravitational wave radiation timescale of the planetary system, and death-line criterion. We also calculate the range of precession period derivative and gravitational wave strength (at earth) permitted by the model. Under reasonable parameters, the observed phenomenon can be understood by a pulsar ($10^{-4}\sim 10^{-1}{M}_{\odot }$) with a quark planet ($10^{-8}\sim 10^{-3}{M}_{\odot }$) orbiting it. According to the calculations presented, the pulsar would be a quark star because of its low mass, which might eject a lump of quark matter (to become a planet around) during its birth.

arXiv comment6 pages, 3 figures, accepted by MNRAS (Letters)

References in corpus (15)

• Deformations of Accreting Neutron Star Crusts and Gravitational Wave Emission
• Constraining Hadronic Superfluidity with Neutron Star Precession
• Solid Quark Stars?
• Freely precessing neutron stars: Model and observations
• Precession of isolated neutron stars I: Effects of imperfect pinning
• Precession Interpretation of the Isolated Pulsar PSR B1828-11
• PULSARS WITH STRONG MAGNETIC FIELDS: POLAR GAPS, BOUND PAIR CREATION AND NONTHERMAL LUMINOSITIES
• Precession of the Isolated Neutron Star PSR B1828-11
• 1E 1207.4-5209: a low-mass bare strange star?
• Quakes in Solid Quark Stars
• Is PSR B0943+10 a low-mass quark star?
• Hydromagnetic and gravitomagnetic crust-core coupling in a precessing neutron star
• To probe into pulsar's interior through gravitational waves
• An accretion disk model for periodic timing variations of pulsars
• On the precession of the isolated pulsar PSR B1828-11

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• Strange Quark stars: Observations & Speculations
• Searching for substellar companions of young isolated neutron stars
• Long-term rotational and emission variability of 17 radio pulsars