TAPIR Seminar

Extracting information on the Neutron Star Equation of State from Gamma-ray Bursts

Cecilia Chirenti, Associate Research Scientist, Department of Astronomy, University of Maryland,

In person: 370 Cahill. To Join via Zoom: 868 5298 8404

ABSTRACT: Short gamma ray bursts (GRBs) have already been associated with binary neutron star mergers, which are also sources of gravitational waves. Numerical relativity simulations indicate that the merger can form a short-lived hypermassive neutron star (which could produce a millisecond magnetar), lasting for tens to hundreds of milliseconds before gravitational collapse forms a black hole. This neutron star remnant is expected to emit gravitational waves (GWs) with kHz frequencies that will be detectable by third generation ground-based GW detectors in the 2030s. Recently, kHz quasiperiodic oscillations were discovered in GRBs 910711 and 931101B, providing evidence for a hypermassive neutron star stage in these events. When analyzed together with new quasi-universal relations obtained from numerical relativity simulations, these detections provide a novel method to constrain the equation of state of the dense matter in neutron star cores.

Event Sponsors:

Theoretical AstroPhysics Including Relativity and Cosmology (TAPIR) - More events from this Sponsor

For more information, please contact JoAnn Boyd by phone at 626-395-4280 or by email at [email protected].