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X-FROM-URL:https://eom.sdu.dk/events/ical/f7043ddc-a7e9-4f40-b1de-4ae393bf
 ada7
X-WR-CALNAME:Journal Club: PBHs and Primordial non-gaussianity: from their
  abundance to gravitational waves
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TZID:Europe/Copenhagen
X-LIC-LOCATION:Europe/Copenhagen
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DTSTAMP:20260513T172933Z
DTSTART:20261028T030000
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DTSTART:20260325T020000
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DESCRIPTION:[b]Speaker:[/b] Antonio Iovino\, master student\n[b]Abstract:[
 /b] The recent data releases by multiple pulsar timing array (PTA) experi
 ments show evidence for Hellings-Downs angular correlations indicating th
 at the observed stochastic common spectrum can be interpreted as a stocha
 stic gravitational wave background. We study whether the signal may origi
 nate from gravitational waves induced by high-amplitude primordial curvat
 ure perturbations. Such large perturbations may be accompanied by the gen
 eration of a sizeable primordial black hole (PBH) abundance. We discuss i
 n which scenarios the inclusion of non-Gaussianities in the computation o
 f the abundance can lead to a signal compatible with the PTA experiments 
 without overproducing PBHs. Eventually we briefly discuss other astrophys
 ical and cosmological explanations for the PTA data.\n[b]Location:[/b] [u
 rl=https://clients.mapsindoors.com/sdu/573f26e4bc1f571b08094312/details/1
 9fef68999464586965ec676]The DIAS Meetingroom Syd (V22-503a-2)[/url]\nYou 
 can also [url=https://syddanskuni.zoom.us/j/68803047878#success]join via 
 Zoom[/url] (passcode: 060379).\n\nThe event is open to all.
DTEND:20240308T120000Z
DTSTAMP:20260513T172933Z
DTSTART:20240308T103000Z
LOCATION:Syddansk Universitet\, Fioniavej 34\, 5230\, Odense M
SEQUENCE:0
SUMMARY:Journal Club: PBHs and Primordial non-gaussianity: from their abun
 dance to gravitational waves
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