Reassessment of GW170817 and GW190425 using higher order mode models
ORAL
Abstract
On August 17, 2017 and April 25, 2019, the LIGO-Virgo Collaboration (LVC) detected its first and second significant binary neutron star systems (BNS) via gravitational wave radiation. The subsequent event and catalog papers used state-of-the-art semi-analytical tidal models that included only the dominant (2,2) mode to estimate the parameters of these systems. Since then, more novel models have been developed to include subdominant modes in their waveform. In this talk, I present the final results of our reanalysis of these two events using two of these models: a hybrid NR surrogate that includes tidal terms (NRHybSur3dq8Tidal) and a newer version of the effective-one-body model for non-precessing and tidal interacting compact binaries (TEOBResumS v2). Similar to previous work on GW170817, I present a mass ejecta calculation and equation of state rankings based off the reanalysis of these two higher order mode models.
*This material is based upon work supported by the National Science Foundation under Grant No. DMS-1439786 while the author was in residence at the Institute for Computational and Experimental Research in Mathematics in Providence, RI, during the Advances in Computational Relativity program. This material is also based upon worked supported by the National Science Foundation under Grant No. NSF-2114581 while the author was in residence at the University of Texas at Austin.
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Presenters
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Jacob A Lange
- University of Texas at Austin