Conveners
Parallel Session: Cosmology & Astroparticle Physics - PBH
- Juan Garcia-Bellido
- Bjoern Garbrecht
Mr
Sebastian Clesse
(RWTH Aachen)
28/09/2017, 16:05
Cosmology & Astroparticle Physics
Since the detection by Advanced LIGO/VIRO of gravitational waves emitted by black holes with masses beyond most expectations, primordial black holes (PBH) have seen a revival of interest as a possible Dark Matter candidate, supported by the coincidence between inferred merging rates by LIGO and the expected rates for PBH abundances comparable to the Dark Matter. I will review the recent and...
Dr
Ville Vaskonen
(NICPB)
28/09/2017, 16:22
Cosmology & Astroparticle Physics
I will discuss the cosmological and astrophysical constraints on the fraction of the dark matter in primordial black holes (PBHs). First, I will describe a general method for extracting constraints for extended PBH mass functions from those for monochromatic ones, demonstrating that the constraints become more stringent in the extended case than the monochromatic one [1]. Then, I will discuss...
Dr
Viacheslav Emelyanov
(Karlsruhe Institute of Technology, Institute of Theoretical Physics)
28/09/2017, 16:39
Cosmology & Astroparticle Physics
Black holes can manifest themselves in local electromagnetic phenomena. This appears to be a consequence of the formation of the event horizon. In this talk, we shall discuss several local imprints of black holes in the far-from- and near-horizon region.
Dr
Tommi Tenkanen
(Queen Mary University of London)
28/09/2017, 16:56
Cosmology & Astroparticle Physics
We study production of primordial black holes (PBH) during an early matter-dominated phase. As a source of perturbations, we consider either the inflaton field with a running spectral index or a spectator field that has a blue spectrum and thus provides a significant contribution to the PBH production at small scales. First, we identify the region of the parameter space where a significant...
Dr
Kyohei Mukaida
(Kavli IPMU)
28/09/2017, 17:13
Cosmology & Astroparticle Physics
Primordial black holes (PBHs) are one of the candidates to explain the gravitational wave (GW) signals observed by the LIGO detectors. Among several phenomena in the early Universe, cosmic inflation is a major example to generate PBHs. In this case, the primordial curvature perturbation should be large enough to generate a sizable amount of PBHs, and thus we have several other probes to test...
Dr
Mauro Pieroni
(Instituto de Fisica Teorica)
28/09/2017, 17:30
Cosmology & Astroparticle Physics
In my talk I discuss the phenomenology of models in which a pseudoscalar inflaton is coupled to some abelian gauge fields. The coupling between the inflaton and the gauge fields induces an instability in the theory which gives rise to a wide range of potentially observable signatures. In particular, I focus on the possibility of generating chiral gravitational waves in the range of direct...
Jose María Ezquiaga
(Instituto de Física Teórica UAM-CSIC)
28/09/2017, 17:48
Cosmology & Astroparticle Physics
The question of the origin of the dark matter (DM) remains as one of the most fundamental mysteries of modern physics. LIGO detections may be the first observations of a large population of primordial black-holes (PBHs) that could constitute today the dominant component of the DM. These PBHs arise naturally in models of Critical Higgs Inflation (CHI), where there is a peak in the spectrum...
