X-ray bounds on the r-mode amplitude in millisecond pulsars

Abstract

r-mode astroseismology provides a unique way to study the internal composition of compact stars. Due to their precise timing, recycled millisecond radio pulsars present a particularly promising class of sources. Although their thermal properties are still poorly constrained, X-ray data is very useful for astroseismology since r-modes could strongly heat a star. Using known and new upper bounds on the temperatures and luminosities of several non-accreting millisecond radio pulsars we derive bounds on the r-mode amplitude as low as $\alpha \lesssim 10^{-8}$ and discuss the impact on scenarios for their internal composition.

10 pages, 8 figures

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Cited by in corpus (7)

• Chandra studies of the globular cluster 47 Tucanae: A deeper X-ray source catalogue, five new X-ray counterparts to millisecond radio pulsars, and new constraints to r-mode instability window
• Ultra-compact X-ray binaries as dual-line gravitational-wave sources
• Long-lasting accretion-powered chemical heating of millisecond pulsars
• Where Are the r-modes? Chandra Observations of Millisecond Pulsars
• r-mode instability of neutron stars in low-mass X-ray binaries: effects of Fermi surface depletion and superfluidity of dense matter
• Radiation driven instability of rapidly rotating relativistic stars: criterion and evolution equations via multipolar expansion of gravitational waves
• Magnetic field amplification by the r-mode instability