Speaker
Yunjia Bao
(University of Chicago)
Description
Gravitational wave (GW) astrophysics is entering a multi-band era with upcoming GW detectors, enabling detailed mapping of the stochastic GW background across vast frequencies. We highlight this potential via a new physics scenario: hybrid topological defects from a two-step phase transition separated by inflation. We develop a general pipeline to analyze experimental exclusions and apply it to this model. The model offers a possible explanation of the NANOGrav signal at low frequencies, and future experiments (LISA/Cosmic Explorer/Einstein Telescope) will confirm or rule it out via the higher-frequency probes, showcasing the power of multi-band constraints.
Authors
Liantao Wang
Töre Boybeyi
(University of Minnesota)
Vuk Mandic
(University of Minnesota)
Yunjia Bao
(University of Chicago)
