First searches for gravitational waves from r-modes of the Crab pulsar

Binod Rajbhandari, Benjamin J. Owen, Santiago Caride, Ra Inta

Research output: Contribution to journalArticlepeer-review

Abstract

We present the first searches for gravitational waves from r-modes of the Crab pulsar, coherently and separately integrating data from three stretches of the first two observing runs of Advanced LIGO using the F-statistic. The second run was divided in two by a glitch of the pulsar roughly halfway through. The frequencies and derivatives searched were based on radio measurements of the pulsar's spin-down parameters as described in Caride et al., [Phys. Rev. D 100, 064013 (2019)PRVDAQ2470-001010.1103/PhysRevD.100.064013]. We did not find any evidence of gravitational waves. Our best 90% confidence upper limits on gravitational wave intrinsic strain were 1.5×10-25 for the first run, 1.3×10-25 for the first stretch of the second run, and 1.1×10-25 for the second stretch of the second run. These are the first upper limits on gravitational waves from r-modes of a known pulsar to beat its spin-down limit, and they do so by more than an order of magnitude in amplitude or two orders of magnitude in luminosity.

Original languageEnglish
Article number122008
JournalPhysical Review D
Volume104
Issue number12
DOIs
StatePublished - Dec 15 2021

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