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

We study how by careful monitoring of the presence or absence of tidaldeformability (TD) and tidal-heating (TH) in the inspiral signal of compactobject binaries in ground-based gravitational wave (GW) detectors, one can testif its components are black holes or not. The former property (TD) is finitefor neutron stars but vanishes for black holes (in general relativity), whereasthe latter is finite for black holes and negligible for neutron stars, andaffects the GW phase evolution of binaries in a distinctly different way. Weintroduce waveform parameters that characterize the strength of tidal-heating,and are zero when there is no horizon. We develop Bayesian methods that use TDand TH for distinguishing the presence or absence of horizons in a binary. Thisis timely owing to several claims that these stellar-mass objects, especially,with masses heavier than those of neutron stars, may not have a horizon but maybe black hole mimickers or exotic compact objects (ECOs). It is alsoastrophysically important to have the tools to test the presence or absence ofhorizons in mass-gap binaries and, thereby, help detect the heaviest neutronstar or the lightest black hole. A proper accounting of tidal-heating in binarywaveform models will also be critical for an unbiased measurement ofcharacteristics of the equation of state of neutron stars in GW observations ofbinaries containing them -- or even to probe the existence of ECOs. We showthat purely based on GW waveforms it will not be possible to discern binaryhorizons in the mass gap in Advanced LIGO, Virgo and KAGRA detectors unless thebinary is within a few tens of Mpc. However, third generation ground-baseddetectors will be able to do so for binaries a few hundred Mpc away.

Recognizing black holes in gravitational-wave observations: Challenges in telling apart impostors in mass-gap binaries