Séminaire / Seminar GReCO |
| « Primordial Black Hole, Dark Matter, and LIGO’s Gravitational Wave Event » |
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Yuichiro Tada |
| The primordial black hole (PBH), which might be produced due to possible large primordial perturbations, has been recently refocused on more and more. One of the main motivations of PBH is dark matter (DM), although the latest observational constraints have almost closed the possible window, except for ~10^{-13} solar-mass PBH. Also the first direct detection of gravitational waves (GWs) by LIGO/Virgo collaboration sheds light on the possibility that the observed massive black holes might be primordial ones. In my talk, I will review these situations of PBH and discuss the PBH formation in two classes of inflation; hybrid and double inflation. First I will briefly show that suitable PBHs can NOT be produced in hybrid inflation, and then the possibilities for DM or LIGO’s event will be investigated in a novel double inflation model. |
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jeudi 20 avril 2017 - 11:00 Salle des séminaires Évry Schatzman Institut d'Astrophysique de Paris |
| Pages web du séminaire / Seminar's webpage |