GW190521 as a Merger of Proca Stars: A Potential New Vector Boson of 8.7 x 10 -13 eV
Advanced LIGO-Virgo have reported a short gravitational-wave signal (GW190521) interpreted as a quasicircular merger of black holes, one at least populating the pair-instability supernova gap, that formed a remnant black hole of ∼142 ⊙ at a luminosity distance of ∼5.3 Gpc. With barely visible pre-...
| Autores: | , , , , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2021 |
| País: | España |
| Institución: | Universidad de Santiago de Compostela (USC) |
| Repositorio: | Minerva. Repositorio Institucional de la Universidad de Santiago de Compostela |
| Idioma: | inglés |
| OAI Identifier: | oai:minerva.usc.gal:10347/45847 |
| Acceso en línea: | https://hdl.handle.net/10347/45847 |
| Access Level: | acceso abierto |
| Palabra clave: | Dark matter General relativity gravitational waves particle dark matter 21 Astronomía Astrofísica |
| Sumario: | Advanced LIGO-Virgo have reported a short gravitational-wave signal (GW190521) interpreted as a quasicircular merger of black holes, one at least populating the pair-instability supernova gap, that formed a remnant black hole of ∼142 ⊙ at a luminosity distance of ∼5.3 Gpc. With barely visible pre-merger emission, however, GW190521 merits further investigation of the pre-merger dynamics and even of the very nature of the colliding objects. We show that GW190521 is consistent with numerically simulated signals from head-on collisions of two (equal mass and spin) horizonless vector boson stars (aka Proca stars), forming a final black hole with =231+13−17 ⊙, located at a distance of =571+348−181 Mpc. This provides the first demonstration of close degeneracy between these two theoretical models, for a real gravitational-wave event. The favored mass for the ultralight vector boson constituent of the Proca stars is V =8.72+0.73−0.82 ×10−13 eV. Confirmation of the Proca star interpretation, which we find statistically slightly preferred, would provide the first evidence for a long sought dark matter particle. |
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