Reassessing candidate eccentric binary black holes: Results with a model including higher-order modes

The detection of orbital eccentricity for a binary black hole system via gravitational waves is a key signature to distinguish between the possible binary origins. The identification of eccentricity has been difficult so far due to the limited availability of eccentric gravitational waveforms over the full range of black hole masses and eccentricities. For the first time using the TEOBResumSGeneral model, we have evaluated the eccentricity of 5 black hole mergers detected by the LIGO and Virgo observatories. This model accounts for large eccentricities and incorporates higher-order gravitational emission critical to model emission from highly eccentric orbits. The binaries have been selected due to previous hints of eccentricity or due to their unusual mass and spin. In this talk, we will present our findings and provide an update on recent work done on events from the O2 and O3 observing runs.