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Which black hole is spinning? Probing the origin of black-hole spin with gravitational waves
Christian Adamcewicz, Shanika Galaudage, Paul D. Lasky +1
Theoretical studies of angular momentum transport suggest that isolated stellar-mass black holes are born with negligible dimensionless spin magnitudes . However, r…
Comparing recent PTA results on the nanohertz stochastic gravitational wave background
The International Pulsar Timing Array Collaboration, G. Agazie, J. Antoniadis +242
The Australian, Chinese, European, Indian, and North American pulsar timing array (PTA) collaborations recently reported, at varying levels, evidence for the presence of a nanohert…
Multi-messenger astronomy with a Southern-Hemisphere gravitational-wave observatory
James W. Gardner, Ling Sun, Ssohrab Borhanian +4
Joint observations of gravitational waves and electromagnetic counterparts will answer questions about cosmology, gamma-ray bursts, and the behaviour of matter at supranuclear dens…
Evidence for a correlation between binary black hole mass ratio and black-hole spins
Christian Adamcewicz, Paul D. Lasky, Eric Thrane
The astrophysical origins of the binary black hole systems seen with gravitational waves are still not well understood. However, features in the distribution of black-hole masses,…
Search for an isotropic gravitational-wave background with the Parkes Pulsar Timing Array
Daniel J. Reardon, Andrew Zic, Ryan M. Shannon +26
Pulsar timing arrays aim to detect nanohertz-frequency gravitational waves (GWs). A background of GWs modulates pulsar arrival times and manifests as a stochastic process, common t…
The International Pulsar Timing Array checklist for the detection of nanohertz gravitational waves
Bruce Allen, Sanjeev Dhurandhar, Yashwant Gupta +5
Pulsar timing arrays (PTAs) provide a way to detect gravitational waves at nanohertz frequencies. In this band, the most likely signals are stochastic, with a power spectrum that r…