%0 Generic %1 carr2019cosmic %A Carr, Bernard %A Clesse, Sebastien %A Garcia-Bellido, Juan %A Kuhnel, Florian %D 2019 %K tifr %T Cosmic Conundra Explained by Thermal History and Primordial Black Holes %U http://arxiv.org/abs/1906.08217 %X A universal mechanism may be responsible for several unresolved cosmic conundra. The sudden drop in the pressure of relativistic matter at $W^\pm / Z^0$ decoupling, the quark-hadron transition and $e^+e^-$ annihilation enhances the probability of primordial black hole (PBH) formation in the early Universe. Assuming the amplitude of the primordial curvature fluctuations is approximately scale-invariant, this implies a multi-modal PBH mass spectrum with peaks at $10^-6$, $1$, $30$, and $10^6\,M_ødot$. This suggests a unified PBH scenario which naturally explains the dark matter and recent microlensing observations, the LIGO/Virgo black hole mergers, the correlations in the cosmic infrared and X-ray backgrounds, and the origin of the supermassive black holes in galactic nuclei at high redshift. A distinct prediction of our model is that LIGO/Virgo should soon observe the merging of black holes with masses between $2$ and $5\,M_ødot$ or above $70\,M_ødot$ and with low mass ratios.

@misc{carr2019cosmic, abstract = {A universal mechanism may be responsible for several unresolved cosmic conundra. The sudden drop in the pressure of relativistic matter at $W^{\pm} / Z^{0}$ decoupling, the quark-hadron transition and $e^{+}e^{-}$ annihilation enhances the probability of primordial black hole (PBH) formation in the early Universe. Assuming the amplitude of the primordial curvature fluctuations is approximately scale-invariant, this implies a multi-modal PBH mass spectrum with peaks at $10^{-6}$, $1$, $30$, and $10^{6}\,M_{\odot}$. This suggests a unified PBH scenario which naturally explains the dark matter and recent microlensing observations, the LIGO/Virgo black hole mergers, the correlations in the cosmic infrared and X-ray backgrounds, and the origin of the supermassive black holes in galactic nuclei at high redshift. A distinct prediction of our model is that LIGO/Virgo should soon observe the merging of black holes with masses between $2$ and $5\,M_{\odot}$ or above $70\,M_{\odot}$ and with low mass ratios.}, added-at = {2019-06-20T06:41:31.000+0200}, author = {Carr, Bernard and Clesse, Sebastien and Garcia-Bellido, Juan and Kuhnel, Florian}, biburl = {https://www.bibsonomy.org/bibtex/2e50fb274afee61dc58f81d39dfad77d5/citekhatri}, description = {Cosmic Conundra Explained by Thermal History and Primordial Black Holes}, interhash = {e26195fce3c1c3ca4edb92ddd8e3e73e}, intrahash = {e50fb274afee61dc58f81d39dfad77d5}, keywords = {tifr}, note = {cite arxiv:1906.08217Comment: 7 pages, 4 figures}, timestamp = {2019-06-20T06:41:31.000+0200}, title = {Cosmic Conundra Explained by Thermal History and Primordial Black Holes}, url = {http://arxiv.org/abs/1906.08217}, year = 2019 }