English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Mergers of gas-rich galaxies lead to black hole binaries that coalesce as aresult of dynamical friction on the ambient gas. Once the binary tightens to<10^3 Schwarzschild radii, its merger is driven by the emission ofgravitational waves (GWs). We show that this transition occurs generically atorbital periods of ~1-10 years and an orbital velocity V of a few thousandkm/s, with a very weak dependence on the supply rate of gas (V proportional toMdot^{1/8}). Therefore, as binaries enter their GW-dominated inspiral, theyinevitably induce large periodic shifts in the broad emission lines of anyassociated quasar(s). The probability of finding a binary in tighterconfigurations scales as V^{-8} owing to their much shorter lifetimes.Systematic monitoring of the broad emission lines of quasars on timescales ofmonths to decades can set a lower limit on the expected rate of GW sources forLISA.

An Electromagnetic Signature of Galactic Black Hole Binaries That Enter Their Gravitational-Wave Induced Inspiral