Local constraints on cosmic string loops from photometry and pulsar timing

摘要: We constrain the cosmological density of cosmic string loops using two observational signatures---gravitational microlensing and Kaiser-Stebbins effect. Photometry from RXTE CoRoT space missions pulsar timing Parkes Pulsar Timing Array, Arecibo Green Bank radio telescopes allow us to probe strings in a wide range tensions $G\ensuremath{\mu}/{c}^{2}={10}^{\ensuremath{-}16}\textdiv{}{10}^{\ensuremath{-}10}$. find that data provide most stringent constraints on abundance light at level ${\ensuremath{\Omega}}_{s}\ensuremath{\sim}{10}^{\ensuremath{-}3}$. Future facilities such as Square Kilometer Array will one improve these by orders magnitude.