Gravitational wave radiation from a double white dwarf system inside our galaxy: a potential method for seeking strange dwarfs

摘要

Like the investigation of double white dwarf (DWD) systems,strange dwarf (SD)–white dwarf (WD) system evolution in Laser Interferometer Space Antenna (LISA)’s absolute amplitude-frequency diagram is investigated. Since there is a strange quark core inside an SD,SDs’ radii are significantly smaller than the value predicted by the standard WD model,which may strongly affect the gravitational wave (GW) signal in the mass-transferring phases of binary systems. We study how an SD-WD binary evolves across LISA’s absolute amplitude-frequency diagram. In principle,we provide an executable way to detect SDs in the Galaxy’s DWD systems by radically new windows offered by GW detectors.