4.7 Article

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

Journal

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 466, Issue 3, Pages 2560-2569

Publisher

OXFORD UNIV PRESS
DOI: 10.1093/mnras/stw3201

Keywords

asteroseismology; dense matter; stars: neutron

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r-mode asteroseismology 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 asteroseismology 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 a less than or similar to 10(8) and discuss the impact on scenarios for their internal composition.

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