Constraints on Cosmic Strings Using Data from the Third Advanced LIGO–Virgo Observing Run

Abstract

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Search for anisotropic gravitational-wave backgrounds using data from Advanced LIGO and Advanced Virgo’s first three observing runs

“…For α ¼ 0, we find the upper limit for the dipole (l ¼ 1) component to be C 1=2 1 < 2.6 × 10 −9 sr −1 , whereas the theoretical study on Nambu-Goto strings based on model 3 in Ref. [48], combined with the most up to date constraints on Gμ using the isotropic component of the GWB [94], Gμ ≲ 4 × 10 −15 , sets C 1=2 1 ≲ 10 −12 sr −1 . This dipole moment is kinematically caused by the Earth's peculiar motion, and other C l modes resulting from the intrinsic anisotropy are expected to be many orders of magnitude smaller than the dipole moment.…”

All-sky search for short gravitational-wave bursts in the third Advanced LIGO and Advanced Virgo run

“…During O3, tens of gravitational waves (GWs) from compact binary coalescence (CBC) were detected [3][4][5][6]. In addition to CBCs, there are several plausible sources of short-duration GW transients (GW bursts) that have not yet been observed, such as corecollapse supernovae (CCSNe), neutron star excitations, nonlinear memory effects, or cosmic string cusps and kinks [7][8][9][10][11]. Additional source populations could exist that are yet to be predicted.…”

Probing superheavy dark matter with gravitational waves

“…For example, the LIGO-Virgo O3 data can exclude Gµ 4 × 10 −15 for some specific string network models[104], much stronger than the results presented in figure2.…”