BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Sarp Akcay (University Coll.\, Dublin) DTSTART:20200716T133000Z DTEND:20200716T143000Z DTSTAMP:20260423T035751Z UID:CENTRA/8 DESCRIPTION:Title: P recession in Stellar-mass Compact Binary Inspirals\nby Sarp Akcay (Uni versity Coll.\, Dublin) as part of CENTRA Seminar\n\n\nAbstract\nI first d iscuss how precessing waveform approximants are generated for LIGO-Virgo p arameter estimation. I then introduce a new such approximant called TEOBRe sumSP that my collaborators and I have been developing. TEOBResumSP is an efficient hybrid scheme for generating precessing gravitational waveforms that combines post-Newtonian precession equations with effective-one-body aligned-spin dynamics. The approach Euler-rotates aligned-spin TEOBResumS waveforms from a precessing frame to an inertial frame via Wigner's D matr ices. The scheme is compared to current state-of-the-art precessing approx imants NRSurd74q and SEOBNRv4PHM in terms of frequency-domain matches of t he $\\el=2$ gravitational-wave strain for approximately 1300 compact binar y inspirals with the initial gravitational-wave frequencies between 20 and 50 Hz and the precessing spin parameter $\\chi_p$ ranging up to one. The matches are better than 0.965 for 85% of the NRSurd74q comparisons and 75% of the SEOBNRv4PHM set. The largest disagreements occur for large mass ra tios and for large spin components along the orbital plane quantified in t erms of a new parameter\, $\\Sperp$\, that I introduce. The disagreements stem from Euler-rotating non-precessing waveforms with constant spins\, wh ich can be replaced by time-varying z-components of spins. TEOBResumSP pro vides a robust alternative precessing approximant to be employed in the pa rameter estimation of generic-spin compact binaries.\n LOCATION:https://researchseminars.org/talk/CENTRA/8/ END:VEVENT END:VCALENDAR