%0 Generic %1 franciolini2021searching %A Franciolini, Gabriele %A Baibhav, Vishal %A De Luca, Valerio %A Ng, Ken K. Y. %A Wong, Kaze W. K. %A Berti, Emanuele %A Pani, Paolo %A Riotto, Antonio %A Vitale, Salvatore %D 2021 %K bayesian_analysis bsm cosmology pbh %R 10.1103/PhysRevD.105.083526 %T Searching for a subpopulation of primordial black holes in LIGO/Virgo gravitational-wave data %U http://arxiv.org/abs/2105.03349 %X With several dozen binary black hole events detected by LIGO/Virgo to date and many more expected in the next few years, gravitational-wave astronomy is shifting from individual-event analyses to population studies. Using the GWTC-2 catalog, we perform a hierarchical Bayesian analysis that for the first time combines several state-of-the-art astrophysical formation models with a population of primordial black holes (PBHs) and constrains the fraction of a putative subpopulation of PBHs in the data. We find that this fraction depends significantly on the set of assumed astrophysical models. While a primordial population is statistically favored against certain competitive astrophysical channels, such as globular clusters and nuclear stellar clusters, a dominant contribution from the stable-mass-transfer isolated formation channel drastically reduces the need for PBHs, except for explaining the rate of mass-gap events like GW190521. The tantalizing possibility that black holes formed after inflation are contributing to LIGO/Virgo observations could only be verified by further reducing uncertainties in astrophysical and primordial formation models, and it may ultimately be confirmed by third-generation interferometers.

@misc{franciolini2021searching, abstract = {With several dozen binary black hole events detected by LIGO/Virgo to date and many more expected in the next few years, gravitational-wave astronomy is shifting from individual-event analyses to population studies. Using the GWTC-2 catalog, we perform a hierarchical Bayesian analysis that for the first time combines several state-of-the-art astrophysical formation models with a population of primordial black holes (PBHs) and constrains the fraction of a putative subpopulation of PBHs in the data. We find that this fraction depends significantly on the set of assumed astrophysical models. While a primordial population is statistically favored against certain competitive astrophysical channels, such as globular clusters and nuclear stellar clusters, a dominant contribution from the stable-mass-transfer isolated formation channel drastically reduces the need for PBHs, except for explaining the rate of mass-gap events like GW190521. The tantalizing possibility that black holes formed after inflation are contributing to LIGO/Virgo observations could only be verified by further reducing uncertainties in astrophysical and primordial formation models, and it may ultimately be confirmed by third-generation interferometers.}, added-at = {2022-12-30T15:48:23.000+0100}, author = {Franciolini, Gabriele and Baibhav, Vishal and De Luca, Valerio and Ng, Ken K. Y. and Wong, Kaze W. K. and Berti, Emanuele and Pani, Paolo and Riotto, Antonio and Vitale, Salvatore}, biburl = {https://www.bibsonomy.org/bibtex/20eea6c4b5ef5f57c566ec99f82283841/intfxdx}, description = {Searching for a subpopulation of primordial black holes in LIGO/Virgo gravitational-wave data}, doi = {10.1103/PhysRevD.105.083526}, interhash = {905e1b2e9fc8781f0c5ad8a332b32ddd}, intrahash = {0eea6c4b5ef5f57c566ec99f82283841}, keywords = {bayesian_analysis bsm cosmology pbh}, note = {cite arxiv:2105.03349Comment: 13 pages, 7 figures. v3: matching published version}, timestamp = {2022-12-30T15:48:23.000+0100}, title = {Searching for a subpopulation of primordial black holes in LIGO/Virgo gravitational-wave data}, url = {http://arxiv.org/abs/2105.03349}, year = 2021 }