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Spinning black hole binary dynamics, scattering amplitudes, and effective field theory
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Multicomponent second-order dissipative relativistic hydrodynamics with binary reactive collisions
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Iteratively comparing gravitational-wave observations to the evolution of massive stellar binaries
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Effects of annihilation with low-energy neutrinos on high-energy neutrinos from binary neutron star mergers and rare core-collapse supernovae
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Revealing phase transition in dense matter with gravitational wave spectroscopy of binary neutron star mergers
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Using equation of state constraints to classify low-mass compact binary mergers
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Improved moving-puncture techniques for compact binary simulations
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Cocoon shock breakout emission from binary neutron star mergers
Shock breakout emission is among the first observable signals in a wide variety of astrophysical phenomena, including neutron star (NS) mergers, and it can be the dominant component in low-luminosity short γ-ray bursts, as exemplified by GRB 170817A. In this work, we investigate the cocoon shock breakout emission in NS mergers and how its signal depends on the outermost layers of the ejecta profile, which we derive from general relativistic radiation hydrodynamic simulations. We study the formation of the cocoon as a consequence of a relativistic jet propagating through the ejecta. To explore the influence of the outermost layers of the ejecta on the breakout emission, we explore cases where the ejecta has a sharp cutoff or an extended smooth tail. We find that the shock breakout emission is strongly influenced by the shape of the ejecta outer layers, with extended tails yielding results consistent with the observed properties of GRB 170817A, whereas sharp cutoffs overestimate the radiated energy. Using a Bayesian analysis, we estimate the best fit parameters of the central engine, considering both accreting black hole and magnetized neutron star scenarios. Our findings indicate a slight preference for the scenarios where the engine is a black hole. Furthermore, our work probes the nature of neutron star mergers and highlights the importance of the shape of the ejecta profile in modeling early electromagnetic counterparts to these mergers.
Decoupling of a supermassive black hole binary from its magnetically arrested circumbinary accretion disk
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Field-driven cluster formation in two-dimensional colloidal binary mixtures
Here, we study size- and charge-asymmetric oppositely charged colloids driven by an external electric field. The large particles are connected by harmonic springs, forming a hexagonal-lattice network, while the small particles are free of bonds and exhibit fluidlike motion. We show that this model exhibits a cluster formation pattern when the external driving force exceeds a critical value. The clustering is accompanied with stable wave packets in vibrational motions of the large particles.
Conservative Dynamics of Binary Systems to Third Post-Minkowskian Order from the Effective Field Theory Approach
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Revealing the Complex Nature of Bonding in the Binary High-Pressure Compound FeO[subscript 2]
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