Blind spots and biases: the dangers of ignoring eccentricity in gravitational-wave signals from binary black holes

Divyajyoti, Divyajyoti, Kumar, Sumit, Tibrewal, Snehal, Romero-Shaw, Isobel M. and Kant Mishra, Chandra 2024. Blind spots and biases: the dangers of ignoring eccentricity in gravitational-wave signals from binary black holes. Physical Review D (particles, fields, gravitation, and cosmology) 109 (4) , 043037. 10.1103/PhysRevD.109.043037

Full text not available from this repository.

Abstract

Most gravitational wave (GW) events observed so far by the LIGO and Virgo detectors are consistent with mergers of binary black holes (BBHs) on quasicircular orbits. However, some events, such as GW190521, are also consistent with having nonzero orbital eccentricity at detection, which can indicate that the binary formed via dynamical interactions. Active GW search pipelines employing quasicircular waveform templates are inefficient for detecting eccentric mergers. Additionally, analysis of GW signals from eccentric BBH with waveform models neglecting eccentricity can lead to biases in the recovered parameters. Here, we explore the detectability and characterization of eccentric signals when searches and analyses rely on quasicircular waveform models. We find that for a reference eccentric population, the fraction of events having fitting factor (FF) <0.95 can be up to ≈2.2% compared to ≈0.4% for the baseline population. This results in the loss in signal recovery fraction for up to 6% for the region in parameter space with non-negligible eccentricity (

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Publisher:	American Physical Society
ISSN:	2470-0010
Last Modified:	16 Oct 2024 12:45
URI:	https://orca.cardiff.ac.uk/id/eprint/172769

Actions (repository staff only)

Edit Item