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

Schwenzer K. O., Boztepe T., Guver T., Vurgun E.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol.466, no.3, pp.2560-2569, 2017 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 466 Issue: 3
  • Publication Date: 2017
  • Doi Number: 10.1093/mnras/stw3201
  • Journal Name: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.2560-2569
  • Keywords: asteroseismology, dense matter, stars: neutron, EQUATION-OF-STATE, NEUTRON-STARS, DENSE MATTER, EMISSION, INSTABILITY, DISCOVERY, OSCILLATIONS, MASS, CHANDRA, TELESCOPE
  • Istanbul University Affiliated: Yes

Abstract

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.