2 天之前 · eccentricities when the inner binary has reached a BBH config-uration, resulting in a short coalescence time. The structure of this paper is as follows. First, we present a detailed stellar model of a CHE binary star system (§2.1), which we integrate with our analytical method to assess the effect of ZLK oscillations (§2.2).

A binary black hole (BBH), or black hole binary, is an astronomical object consisting of two black holes in close orbit around each other. Like black holes themselves, binary black holes are often divided into binary stellar black holes , formed either as remnants of high-mass binary star systems or by dynamic processes and mutual capture; and ...

4 天之前 · If a stellar merger is avoided, the inner binary may eventually form a BBH. In mildly hierarchical triples, with outer periods of around 100 d, the tertiary component can trigger a rapid merger of the BBH on timescales comparable to the outer orbital period. Stellar tides play a crucial role in determining the fate of the inner binary in such ...

2 天之前 · This may result in triples where the ZLK effect can significantly perturb the eccentricity of the BBH. In our default CHE binary, in certain triple configurations, the time-to-coalescence via gravitational-wave emission can decrease by several orders of magnitude, leading to prompt mergers only ∼ 100 similar-to absent 100 \sim 100 ∼ 100 yr ...

2025年1月21日 · We report the detection of six new candidate binary black hole (BBH) merger signals in the publicly released data from the second half of the third observing run (O3b) of advanced LIGO and advanced Virgo.

Understanding binary black hole (BBH) dynamics in dense star clusters is key to interpreting the gravitational wave detections by Laser Interferometer Gravitational-Wave Observatory (LIGO) and Virgo. Here, we perform N-body simulations of star clusters, focusing on BBH formation mechanisms, dynamical evolution, and merging properties. We explore a wide parameter space of initial conditions ...

6 天之前 · The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration report: We identified the compact binary merger candidate S250319bu during real-time processing of data from LIGO Hanford Observatory (H1), LIGO Livingston Observatory (L1), and Virgo Observatory (V1) at 2025-03-19 06:25:36.479 UTC (GPS time: 1426400754.479). The candidate was found by the GstLAL [1], MBTA ...

2018年3月29日 · Binary black holes (BBHs) are one of the endpoints of isolated binary evolution, and their mergers a leading channel for gravitational wave events. Here, using the evolutionary code StarTrack, we study the statistical properties of the BBH population from isolated binary evolution for a range of progenitor star metallicities and BH natal kicks.

2020年7月9日 · We review the main physical processes that lead to the formation of stellar binary black holes (BBHs) and to their merger. BBHs can form from the isolated evolution of massive binary stars. The...

2020年7月8日 · We review the main physical processes that lead to the formation of stellar binary black holes (BBHs) and to their merger. BBHs can form from the isolated evolution of massive binary stars. The physics of core-collapse supernovae and the process of common envelope are two of the main sources of uncertainty about this formation channel.