Jul 5 – 10, 2021
Europe/Rome timezone

Light in the dark: GW190521 as Proca star merger

Jul 5, 2021, 4:30 PM
Invited talk in the parallel session Scalar fields in cosmology Scalar Fields in Cosmology


Dr Nicolas Sanchis-Gual (University of Aveiro)


The detections of gravitational waves are opening a new window to the Universe. The nature of black holes and neutron stars may now be unveiled, but gravitational radiation may also lead to exciting discoveries of new exotic compact objects, oblivious to electromagnetic waves. In particular, Advanced LIGO-Virgo recently reported a short gravitational-wave signal (GW190521) interpreted as a quasi-circular merger of black holes, one at least populating the pair-instability supernova gap. We found that GW190521 is also consistent with numerically simulated signals from head-on collisions of two (equal mass and spin) horizonless vector boson stars (aka Proca stars). This provides the first demonstration of close degeneracy between these two
theoretical models, for a real gravitational-wave event.

Primary author

Dr Nicolas Sanchis-Gual (University of Aveiro)


Dr Alejandro Torres-Forné (University of Valencia) Dr Avi Vajpeyi Prof. Carlos Herdeiro (Aveiro University, Portugal) Dr Eugen Radu (Aveiro University) Prof. José A. Font (University of Valencia) Dr Juan Calderón Bustillo (University of Santiago de Compostela) Dr Rory Smith Mr Samuel H. W. Leong

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