# Implications for First-Order Cosmological Phase Transitions from the Third LIGO-Virgo Observing Run.

@article{Romero2021ImplicationsFF, title={Implications for First-Order Cosmological Phase Transitions from the Third LIGO-Virgo Observing Run.}, author={Alba Romero and Katarina Martinovic and Thomas A. Callister and Huai-Ke Guo and Mario Mart{\'i}nez and Mairi Sakellariadou and Feng-Wei Yang and Yue Zhao}, journal={Physical review letters}, year={2021}, volume={126 15}, pages={ 151301 } }

We place constraints on the normalized energy density in gravitational waves from first-order strong phase transitions using data from Advanced LIGO and Virgo's first, second, and third observing runs. First, adopting a broken power law model, we place 95% confidence level upper limits simultaneously on the gravitational-wave energy density at 25 Hz from unresolved compact binary mergers, Ω_{CBC}<6.1×10^{-9}, and strong first-order phase transitions, Ω_{BPL}<4.4×10^{-9}. The inclusion of the…

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