97 citations · 187 across the 7 of their papers we have counts for
4 papers · 1 filter
Cosmic strings and domain walls: the impact of CMB -mode data
Luca Caloni, Ricardo Z. Ferreira, Lara Sousa +1
We analyse CMB constraints on stable networks of cosmic strings and domain walls using for the first time full Planck 2018 data together with BICEP/Keck 2018 -mode measurements.…
Constraints on Dark Matter Structures around Gaia Black Holes
Nuno P. Branco, Ricardo Z. Ferreira, João G. Rosa +1
We demonstrate that Gaia's detection of stars on wide orbits around black holes opens a new observational window on dark matter structures -- such as scalar clouds and dark matter…
Collapsing Domain Wall Networks: Impact on Pulsar Timing Arrays and Primordial Black Holes
Ricardo Z. Ferreira, Alessio Notari, Oriol Pujolàs +1
Unstable domain wall (DW) networks in the early universe are cosmologically viable and can emit a large amount of gravitational waves (GW) before annihilating. As such, they provid…
Gravitational Waves from Domain Walls in Pulsar Timing Array Datasets
Ricardo Z. Ferreira, Alessio Notari, Oriol Pujolas +1
We present a model-independent search for the gravitational wave background from cosmic domain walls (DWs) in the NANOGrav 12.5 years dataset and International PTA Data Release 2.…