Finding Structure in the Speed of Sound of Supranuclear Matter from Binary Love Relations
Hung Tan, Verônica Dexheimer, Jacquelyn Noronha-Hostler, Nicolás Yunes
Abstract
Analyses that connect observations of neutron stars with nuclear-matter properties can rely on equation-of-state insensitive relations. We show that the slope of the binary Love relations (between the tidal deformabilities of binary neutron stars) encodes the baryon density at which the speed of sound rapidly changes. Twin stars lead to relations that present a signature "hill," "drop," and "swoosh" due to the second (mass-radius) stable branch, requiring a new description of the binary Love relations. Together, these features can reveal new properties and phases of nuclear matter.
Topics & Concepts
Neutron starPhysicsSpeed of soundBinary numberEquation of stateStarsRADIUSStrange matterNuclear matterState of matterAstrophysicsSignature (topology)Nuclear physicsNucleonQuantum mechanicsGeometryMathematicsComputer securityComputer scienceArithmeticPulsars and Gravitational Waves ResearchGamma-ray bursts and supernovaeAtomic and Subatomic Physics Research