Cosmological distance indicators by coalescing binaries

TL;DR

This paper explores how gravitational wave observations of inspiraling binaries can serve as independent standard candles for measuring cosmic distances up to redshift 0.1, enhancing cosmological studies.

Contribution

It proposes using gravitational wave signals from coalescing binaries as a new method for cosmological distance measurement, complementing traditional techniques.

Findings

Gravitational waves can determine binary luminosity and redshift independently.

Binary systems can act as standard candles for distance measurement.

Potential to improve cosmic distance ladder accuracy.

Abstract

Gravitational waves detected from well-localized inspiraling binaries would allow to determine, directly and independently, both binary luminosity and redshift. In this case, such systems could behave as "standard candles" providing an excellent probe of cosmic distances up to z < 0.1 and thus complementing other indicators of cosmological distance ladder.