BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:Eccentricity evolution consistency test to distinguish eccentric g ravitational-wave signals from eccentricity mimickers DTSTART;VALUE=DATE-TIME:20260705T093000Z DTEND;VALUE=DATE-TIME:20260705T094500Z DTSTAMP;VALUE=DATE-TIME:20261027T091251Z UID:indico-contribution-811@indico.narit.or.th DESCRIPTION:Speakers: Sajad Ahmad Bhat (Inter-University Center for Astron omy and Astrophysics (IUCAA)\, India)\nEccentric compact binary coalescenc es (CBCs) are expected to be observed in current and future gravitational- wave (GW) detector networks. Such detections are especially valuable as th ey can provide insights on the environments that nurture CBCs. However\, i t has been recently pointed out that a number of other physical and beyond -GR effects could imitate\, or be mimicked by\, eccentric CBCs. The standa rd approach to ascertain that a detected CBC is eccentric is to employ Bay esian model selection\, where the eccentric CBC hypothesis is compared aga inst other hypotheses. Such an approach is not only computationally intens ive and time-consuming\, but could also be misleading if none of the model s under consideration represent the true model. In this work\, we propose a conceptually simple but powerful method to directly confirm or reject th e eccentric hypothesis\, without needing to compare the hypothesis with th e plethora of other possible hypotheses. The key idea is that while spurio us nonzero values of eccentricity\, at some reference frequency\, could be acquired when a noneccentric CBC with additional physical/beyond-GR effec ts is recovered with an eccentric CBC waveform model\, the evolution of ec centricity with frequency will in general not be mimicked. We accordingly formulate an eccentricity evolution consistency test (EECT). The method co mpares the eccentricity recovered at some low frequency value (e.g.\, 10 H z)\, evolved to higher frequencies assuming GR\, with eccentricities recov ered at those same higher frequencies. Discrepancy between the two eccentr icities at any reference frequency would violate EECT and indicate the pre sence of a mimicker. As a proof of concept\, assuming a few eccentric CBC systems\, quasicircular CBCs with additional physics mimicking eccentricit y\, and an O4-like three-detector-network configuration\, we demonstrate t hat our proposed method is indeed able to reject mimickers at ≥ 68% conf idence\, while ensuring that truly eccentric CBCs satisfy EECT\n\nhttps:// indico.narit.or.th/event/236/contributions/811/ LOCATION:National Astronomical Research Institute of Thailand (NARIT) Andr omeda Meeting Room URL:https://indico.narit.or.th/event/236/contributions/811/ END:VEVENT END:VCALENDAR