Speaker:听Antonio Iovino,听master student
Abstract:听The recent data releases by multiple pulsar timing array (PTA) experiments show evidence for Hellings-Downs angular correlations indicating that the observed stochastic common spectrum can be interpreted as a stochastic gravitational wave background. We study whether the signal may originate from gravitational waves induced by high-amplitude primordial curvature perturbations. Such large perturbations may be accompanied by the generation of a sizeable primordial black hole (PBH) abundance. We discuss in which scenarios the inclusion of non-Gaussianities in the computation of the abundance can lead to a signal compatible with the PTA experiments without overproducing PBHs. Eventually we briefly discuss other astrophysical and cosmological explanations for the PTA data.
Location:听
You can also (passcode: 060379).
The event is open to all.
Abstract:听The recent data releases by multiple pulsar timing array (PTA) experiments show evidence for Hellings-Downs angular correlations indicating that the observed stochastic common spectrum can be interpreted as a stochastic gravitational wave background. We study whether the signal may originate from gravitational waves induced by high-amplitude primordial curvature perturbations. Such large perturbations may be accompanied by the generation of a sizeable primordial black hole (PBH) abundance. We discuss in which scenarios the inclusion of non-Gaussianities in the computation of the abundance can lead to a signal compatible with the PTA experiments without overproducing PBHs. Eventually we briefly discuss other astrophysical and cosmological explanations for the PTA data.
Location:听
You can also (passcode: 060379).
The event is open to all.
- Organizer: Quantum Field Theory Center
- Address:
- Contact Email: damiapaciarinim@qtc.sdu.dk
- Download slides from the talk: /-/media/files/forskning/quantum-field-theory-centre/friday-journal-club/jc-antoniojiovino.pdf
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