Re-visiting gravitational wave events via pulsars

Abstract

By now many gravitational wave (GW) signals have been detected by LIGO and Virgo, with the waves reaching earth directly from their respective sources. These waves will also travel to different pulsars and will cause (tiny) transient deformations in the pulsar shape. Some of us have recently shown that the resultant transient change in the pulsar moment of inertia may leave an observable imprint on the pulsar signals as detected on earth, especially at resonance. The pulsars may thus act as remotely stationed Weber gravitational wave detectors. This allows us to revisit the past GW events, including past supernova events, via pulsars. We give here sample list of specific pulsars whose future signals will carry the imprints of past GW events. Some interesting cases are, signal of supernova SN1885 via pulsar B2310+42, should reach earth some time during year 2022 to 2044, and signal of supernova SN1604 via pulsar J1813-1246 during 1971 to 2052. Even the signal of earliest recorded supernova SN185 event may become observable again via pulsars J0900-3144 and pulsar J1858-2216 with perturbed pulsar signal arrival date reaching us during 2016-2049.