Abstract Details

Name: Md Arif Shaikh
Affiliation: International Centre for Theoretical Sciences
Conference ID: ASI2021_608
Title : Probing evolution of compact binaries using higher modes of gravitational wave
Authors and Co-Authors : Md Arif Shaikh(ICTS-TIFR), Ajit K Mehta(AEI, Max Planck Institute for Gravitational Physics, Postdam), Swapnil Shankar(ICTS-TIFR), Elizabeth Bennewitz(ICTS-TIFR), Chandra K. Mishra(IIT Madras), Mukesh K. Singh(ICTS-TIFR), P. Ajith(ICTS-TIFR)
Abstract Type : Poster
Abstract Category : Extragalactic Astronomy
Abstract : Ground-based gravitational-wave (GW) detectors like the LIGO and Virgo have been successfully detecting GWs from compact binary mergers. Being sensitive in the frequency band ~ 10 − 10^3 Hz, these detectors nominally detect GWs generated only during the last stages of their inspiral and subsequent merger. However, GW signals from asymmetric mass binaries can contain appreciable contributions from higher-order (non-quadrupole) modes of the radiation. Since these higher modes are generated at higher multiples of the orbital frequency, higher modes generated during the earlier stages of the inspiral can fall in the detectors’ sensitive frequency band. They contain the signatures of the early evolution of the binary’s orbit (e.g., signatures of orbital eccentricity which might not be measurable during the late inspiral, since the binary would have circularized by then due to effects of radiation reaction). We show that measurement of the higher modes in the detected signal allows us to probe the early evolution of the compact binary, and will potentially allow us to infer its astrophysical formation channel.