Gravitational Waves From Known Pulsars: Results From the Initial Detector Era

Abstract

We present the results of searches for gravitational waves from a large selection of pulsars using data from the most recent science runs (S6, VSR2 and VSR4) of the initial generation of interferometric gravitational wave detectors LIGO (Laser Interferometric Gravitational-wave Observatory) and Virgo. We do not see evidence for gravitational wave emission from any of the targeted sources but produce upper limits on the emission amplitude. We highlight the results from seven young pulsars with large spin-down luminosities. We reach within a factor of five of the canonical spin-down limit for all seven of these, whilst for the Crab and Vela pulsars we further surpass their spin-down limits. We present new or updated limits for 172 other pulsars (including both young and millisecond pulsars). Now that the detectors are undergoing major upgrades, and, for completeness, we bring together all of the most up-to-date results from all pulsars searched for during the operations of the first-generation LIGO, Virgo and GEO600 detectors. This gives a total of 195 pulsars including the most recent results described in this paper.

Gravitational radiation from neutron stars deformed by crustal Hall drift

“…Using the above estimates in comparison with our time evolved models with various magnetic field strengths, we can compare our predicted values for for both the AL and BL models for the 7 high-interest pulsars of Aasi et al (2014). We present the results in Table 5.…”

“…A typical evolution involves the toroidal field redistributing itself to lead to the creation of high-order multipolar structures in (Aasi et al 2014). |Bs| and τc were computed from data given in Aasi et al (2014).…”

“…A typical evolution involves the toroidal field redistributing itself to lead to the creation of high-order multipolar structures in (Aasi et al 2014). |Bs| and τc were computed from data given in Aasi et al (2014). The fourth column shows the observational upper limits on from LIGO and Virgo (Aasi et al 2014), the fifth column shows as predicted by the AL model, and the sixth column shows as predicted by the BL model.…”

“…|Bs| and τc were computed from data given in Aasi et al (2014). The fourth column shows the observational upper limits on from LIGO and Virgo (Aasi et al 2014), the fifth column shows as predicted by the AL model, and the sixth column shows as predicted by the BL model. 14 G at the crust-core interface and at a meridional angle of about 46…”

“…Aasi et al (2014) presented the results from the latest science runs of initial-generation GW detectors LIGO (Laser Interferometric Gravitational-wave Observatory) and Virgo. No evidence of GW were detected.…”