BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//linuxsoftware.nz//NONSGML Joyous v1.4//EN
BEGIN:VEVENT
SUMMARY:Core collapse in massive ST theory: phenomenology and observationa
 l potential
DTSTART:20230302T143000Z
DTEND:20230302T160000Z
DTSTAMP:20260811T084821Z
UID:62e85c5f-b593-48a6-9a31-ba850abf0013
SEQUENCE:1
CREATED:20230224T161418Z
DESCRIPTION: ABSTRACT: Though General Relativity has been successfully tes
 ted so far\, concepts such as dark energy and string theory suggest the ne
 ed of modifying it. Scalar-tensor theory is one of the most popular altern
 atives discussed. We produce studies of stellar core collapse in spherical
  symmetry in which we systematically explore the parameter space that char
 acterizes the progenitor stars\, the equation of state and the scalar-tens
 or theory of the core collapse events. We identify a remarkably simple and
  straightforward classification scheme of the resulting collapse events. F
 or any given set of parameters\, the collapse leads to one of three end st
 ates\, a weakly scalarized neutron star\, a strongly scalarized neutron st
 ar or a black hole\, possibly formed in multiple stages. The latter two en
 d states can lead to strong gravitational-wave signals that may be detecta
 ble in present continuous-wave searches with ground-based detectors. The d
 ispersive nature of the propagation of waves in the massive scalar field m
 eans the gravitational wave signals are long lived and many such signals c
 an overlap to form a stochastic background. Using different models for the
  population of supernova events in the nearby universe\, we compute predic
 tions for the energy-density in the stochastic scalar-polarized gravitatio
 nal wave background from core-collapse events in massive scalar-tensor gra
 vity for theory parameters that facilitate strong scalarization. 
LAST-MODIFIED:20230224T161418Z
LOCATION:Sala de Seminários do DF\,  Pavilhão de Física\, 2º piso
URL:http://df.vps.tecnico.ulisboa.pt/pt/eventos/core-collapse-in-massive-s
 t-theory-phenomenology-and-observational-potential/
X-ALT-DESC;FMTTYPE=text/html:<p data-block-key="zux4y"> ABSTRACT: </p><p d
 ata-block-key="9e7v7">Though General Relativity has been successfully test
 ed so far\, concepts such as dark energy and string theory suggest the nee
 d of modifying it. Scalar-tensor theory is one of the most popular alterna
 tives discussed. We produce studies of stellar core collapse in spherical 
 symmetry in which we systematically explore the parameter space that chara
 cterizes the progenitor stars\, the equation of state and the scalar-tenso
 r theory of the core collapse events. <br/><br/>We identify a remarkably s
 imple and straightforward classification scheme of the resulting collapse 
 events. For any given set of parameters\, the collapse leads to one of thr
 ee end states\, a weakly scalarized neutron star\, a strongly scalarized n
 eutron star or a black hole\, possibly formed in multiple stages. The latt
 er two end states can lead to strong gravitational-wave signals that may b
 e detectable in present continuous-wave searches with ground-based detecto
 rs. <br/><br/>The dispersive nature of the propagation of waves in the mas
 sive scalar field means the gravitational wave signals are long lived and 
 many such signals can overlap to form a stochastic background. Using diffe
 rent models for the population of supernova events in the nearby universe\
 , we compute predictions for the energy-density in the stochastic scalar-p
 olarized gravitational wave background from core-collapse events in massiv
 e scalar-tensor gravity for theory parameters that facilitate strong scala
 rization. </p>
END:VEVENT
END:VCALENDAR