Measuring the Galactic Binary Fluxes with LISA: Metamorphoses and Disappearances of White Dwarf Binaries

TL;DR

This paper proposes a method to analyze LISA's gravitational wave data to measure white dwarf binary fluxes, revealing their long-term evolution and astrophysical insights through frequency drift analysis.

Contribution

It introduces a novel approach to measure binary fluxes in frequency space using LISA data, focusing on long-term evolution and binary metamorphoses.

Findings

Feasibility of flux measurement with LISA demonstrated

Potential to reveal white dwarf binary evolution

Insights into exotic astrophysical objects gained

Abstract

The space gravitational wave detector LISA is expected to detect $\sim10^4$ of nearly monochromatic binaries, after $\sim 10$\.yr operation. We propose to measure the inspiral/outspiral binary fluxes in the frequency space, by processing tiny frequency drifts of these numerous binaries. Rich astrophysical information is encoded in the frequency dependencies of the two fluxes, and we can read the long-term evolution of white dwarf binaries, resulting in metamorphoses or disappearances. This measurement will thus help us to deepen our understanding on the strongly interacting exotic objects. Using a simplified model for the frequency drift speeds, we discuss the primary aspects of the flux measurement, including the prospects with LISA.