5 papers
What Are Pulsar Companions Made of? Using Gravitational Tides to Probe Their Compositions
Liam Colombo-Murphy, Lucas Brown, Stefano Profumo +2
Low eccentricity, short orbital period pulsar companions may provide a probe to study novel dense and stable exoplanet internal compositions due to the potentially significant orbi…
High-frequency gravitational wave transients from superradiance
Henry Su, Lucas Brown, Christopher Ewasiuk +1
Ultralight bosons can form macroscopic gravitational-atom clouds around rotating black holes via superradiance, sourcing quasi-monochromatic gravitational waves through level trans…
The Maximal Gravitational Wave Signal from Asteroid-Mass Primordial Black Hole Mergers At Resonant Microwave Cavities
Stefano Profumo, Lucas Brown, Christopher Ewasiuk +2
Primordial black holes can be the entirety of the dark matter in a broad, approximately five-orders-of-magnitude-wide mass range, the ``asteroid mass range'', between $10^{-16}\ M_…
A Louder Gravitational Wave Bang from a Fast-Expanding Universe
Lucas Brown, Stefano Profumo, Aditi Gangadharan +1
A strong first-order phase transition in a dark sector may produce all or part of the low-frequency gravitational wave signal recently reported by the NANOGrav Collaboration and ot…
The NANOGrav 15 yr Data Set: Looking for Signs of Discreteness in the Gravitational-wave Background
Gabriella Agazie, Akash Anumarlapudi, Anne M. Archibald +97
The cosmic merger history of supermassive black hole binaries (SMBHBs) is expected to produce a low-frequency gravitational wave background (GWB). Here we investigate how signs of…