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 Tools annual

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 monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

We present results from a controlled numerical experiment investigating theeffect of stellar density gas on the coalescence of binary black holes (BBHs)and the resulting gravitational waves (GWs). This investigation is motivated bythe proposed stellar core fragmentation scenario for BBH formation and theassociated possibility of an electromagnetic counterpart to a BBH GW event. Weemploy full numerical relativity coupled with general-relativistichydrodynamics and set up a $30 + 30 M_\odot$ BBH (motivated by GW150914) insidegas with realistic stellar densities. Our results show that at densities $\rho\gtrsim 10^6 - 10^7 \, \mathrm{g \, cm}^{-3}$ dynamical friction between theBHs and gas changes the coalescence dynamics and the GW signal in anunmistakable way. We show that for GW150914, LIGO observations conclusivelyrule out BBH coalescence inside stellar gas of $\rho \gtrsim 10^7 \,\mathrm{g\,cm}^{-3}$. Typical densities in the collapsing cores of massivestars are in excess of this density. This excludes the fragmentation scenariofor the formation of GW150914.

Gravitational Waves from Binary Black Hole Mergers Inside of Stars