Towards a gravitational-wave catalogue of boson-star mergers

1 Sep 2021, 17:10
Talk in parallel session Gravitational Waves Discussion Panel Gravitational Waves 2


Juan Calderon Bustillo (Galician Institute of High Energy Physics (IGFAE))


Advanced LIGO and Virgo have delivered a conclusive gravitational-wave signal consistent with compact binary mergers in the intermediate-mass black-hole range and as well as several lower significance triggers. These signals have challenged in several ways our vanilla analysis methods, all done within the “canonical” paradigm of quasi-circular black hole mergers. First, under such assumption, GW190521 points to the existence of a black-hole in the PISN gap. Second, analyses performed on the lower significance trigger S200114f with different waveform families report inconsistent results. The barely observable pre-merger emission of these signals, however, allows for the consideration of alternative scenarios both within and beyond the black-hole merger one. In this talk, we will present an analysis of GW190521 and S200114f within the paradigm of the merger of horizonless compact objects known as boson (Proca)-stars, providing estimates of the mass of the underlying ultralight bosons. This could be the first step towards the construction of an eventual catalogue of mergers of compact exotic objects.

Reference to paper (DOI or arXiv)

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