Bulletin of the American Physical Society
APS April Meeting 2019
Volume 64, Number 3
Saturday–Tuesday, April 13–16, 2019; Denver, Colorado
Session T09: Progress in Understanding Neutron Stars and Pulsars
3:30 PM–5:18 PM,
Monday, April 15, 2019
Sheraton
Room: Governor's Square 11
Sponsoring
Unit:
DAP
Chair: Bernard Kelly, NASA GSFC
Abstract: T09.00005 : Inferring neutron star properties from GW170817 with universal relations
4:18 PM–4:30 PM
View Presentation Abstract
Presenter:
Philippe Landry
(University of Chicago)
Authors:
Philippe Landry
(University of Chicago)
Bharat Kumar
(Inter-University Centre for Astronomy and Astrophysics)
Because all neutron stars share a common equation of state, the tidal deformability measurement from the binary merger GW170817 has implications for the properties of other neutron-star systems. Using equation-of-state insensitive relations between observables like moment of inertia, tidal deformability and stellar compactness, we derive constraints on these properties as a function of neutron-star mass. The constraints allow us to make virtually model-independent inferences for the double pulsar moment of inertia, the radii of X-ray bursters, and millisecond pulsar spins. The gravitational-wave based estimates can be compared or combined with electromagnetic measurements, where available, to test the universality of the equation of state and enhance probes of neutron-star structure.
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