A likelihood forecast shows e-ASTROGAM could, in parts of the f1-f2 plane, distinguish double-peaked from single-peaked PBH gamma-ray spectra in the 1e15 to 1e17 g mass window.
On Primordial Black Holes and secondary gravitational waves generated from inflation with solo/multi-bumpy potential
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abstract
It is well known that a primordial black hole (PBH) can be generated in the inflation process of the early universe, especially when the inflation field has a number of non-trivial features that could break the slow-roll condition. In this study, we investigate a toy model of inflation with bumpy potential, which has one or several bumps. We determined that the potential with multi-bump can generate power spectra with multi-peaks in small-scale region, which can in turn predict the generation of primordial black holes in various mass ranges. We also consider the two possibilities of PBH formation by spherical and elliptical collapses. Finally, we discuss the scalar-induced gravitational waves(SIGWs)generated by linear scalar perturbations at second order.
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Probing Double-Peaked Gamma-Ray Spectra from Primordial Black Holes with Next-Generation Gamma-Ray Experiments
A likelihood forecast shows e-ASTROGAM could, in parts of the f1-f2 plane, distinguish double-peaked from single-peaked PBH gamma-ray spectra in the 1e15 to 1e17 g mass window.