Coalescing binaries as possible standard candles

TL;DR

This paper explores how gravitational waves from inspiraling binaries can serve as standard candles to measure cosmic distances independently, potentially improving our understanding of the universe's expansion.

Contribution

It proposes using gravitational wave signals from well-localized binaries as standard candles for cosmology, offering a new independent distance measurement method.

Findings

Gravitational waves can determine binary luminosity and redshift independently.

Such systems can act as standard candles up to redshift z<0.1.

This method complements existing cosmological distance indicators.

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.