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BEGIN:VEVENT
DTSTART;TZID=Atlantic/Canary:20210316T123000
DTEND;TZID=Atlantic/Canary:20210316T133000
UID:iactalks-1453
X-WR-CALNAME: IAC Talks: Open Astronomy Seminars
X-ORIGINAL-URL: /iactalks/Talks/view/1453
CREATED:2021-03-16T12:30:00+00:00
X-WR-CALDESC: IAC Talks upcomming talks
SUMMARY:Light in the dark: GW190521 as a boson star merger 
DESCRIPTION:Light in the dark: GW190521 as a boson star merger \nDr. NicolÃ
 ¡s Sanchis-Gual\n\nThe 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 electromagne
 tic waves. In particular, Advanced LIGO-Virgo recently reported a sho
 rt gravitational-wave signal (GW190521) interpreted as a quasi-circul
 ar merger of black holes, one at least populating the pair-instabilit
 y supernova gap. We found that GW190521 is also consistent with 
 numerically simulated signals from head-on collisions of two (equal mass&n
 bsp;and spin) horizonless vector boson stars (aka Proca stars). This 
 provides the first demonstration of close degeneracy between these two&nbs
 p;theoretical models, for a real gravitational-wave event. 
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