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SUMMARY:Distinct observational signatures of dark matter in evolving neutr
 on stars
DTSTART:20260506T130000Z
DTEND:20260506T140000Z
DTSTAMP:20260614T041300Z
UID:indico-event-2192@indico.lip.pt
CONTACT:pbras@lip.pt\;psilva@uc.pt
DESCRIPTION:Speakers: Adamu Issifu (Instituto Tecnologico de Aeronáutica\
 , Brasil)\n\nDense astrophysical objects\, such as neutron stars\, have lo
 ng served as probes of fundamental physics. The absence of signals in dark
  matter (DM) direct detection experiments has further motivated the search
  for DM signatures in these systems. In this work\, we explore such signa
 tures during the early protoneutron star (PNS) phase. Using a two-fluid fo
 rmalism in which DM interacts with ordinary matter (OM) solely through gr
 avity\, we model the structural and thermal evolution of PNSs admixed with
  asymmetric DM\, considering both fermionic and bosonic candidates. We fin
 d a clear and distinctive thermal signature of DM: a compact DM core heat
 s the star by deepening the gravitational potential and compressing OM\, w
 hereas an extended DM halo provides additional support\, leading to net co
 oling. This behavior contrasts with that of exotic baryons\, which soften 
 the equation of state and systematically reduce stellar temperatures. Furt
 hermore\, the nature of the DM–OM coupling plays a decisive role: gravit
 ational coupling leads to heating\, while nongravitational interactions\, 
 modeled via a Higgs portal as a single fluid\, allow DM to act as a heat r
 eservoir\, inducing cooling. These contrasting thermal imprints provide a 
 potentially observable discriminant of DM properties through combined mult
 imessanger observations\, including supernova neutrino emission and the th
 ermal evolution of young neutron stars.\n\nhttps://indico.lip.pt/event/219
 2/
LOCATION:Sala de Conferências (Departamento de Física FCTUC)
URL:https://indico.lip.pt/event/2192/
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