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GW170817, general relativistic magnetohydrodynamic simulations, and the neutron star maximum mass.

- M. Ruiz, S. Shapiro, A. Tsokaros
- Physics, Medicine
- Physical review. D.
- 1 November 2017

Recent numerical simulations in general relativistic magnetohydrodynamics (GRMHD) provide useful constraints for the interpretation of the GW170817 discovery. Combining the observed data with these… Expand

BINARY NEUTRON STAR MERGERS: A JET ENGINE FOR SHORT GAMMA-RAY BURSTS.

- M. Ruiz, R. Lang, V. Paschalidis, S. Shapiro
- Physics, Medicine
- The astrophysical journal. Letters
- 8 April 2016

We perform magnetohydrodynamic simulations in full general relativity (GRMHD) of quasi-circular, equal-mass, binary neutron stars that undergo merger. The initial stars are irrotational, n = 1… Expand

Relativistic simulations of black hole-neutron star coalescence: the jet emerges

- V. Paschalidis, M. Ruiz, S. Shapiro
- Physics
- 27 October 2014

We perform magnetohydrodynamic simulations in full general relativity (GRMHD) of a binary black hole-neutron star on a quasicircular orbit that undergoes merger. The binary mass ratio is 3:1, the… Expand

General relativistic magnetohydrodynamics simulations of prompt-collapse neutron star mergers: The absence of jets.

- M. Ruiz, S. Shapiro
- Physics, Medicine
- Physical review. D.
- 15 October 2017

Inspiraling and merging binary neutron stars are not only important source of gravitational waves, but also promising candidates for coincident electromagnetic counterparts. These systems are thought… Expand

GW190814: Spin and equation of state of a neutron star companion

- A. Tsokaros, M. Ruiz, S. Shapiro
- Physics
- 10 July 2020

The recent discovery by LIGO/Virgo of a merging binary having a $\sim 23 M_\odot$ black hole and a $\sim 2.6 M_\odot$ compact companion has triggered a debate regarding the nature of the secondary,… Expand

Disks around merging binary black holes: From GW150914 to supermassive black holes.

- A. Khan, V. Paschalidis, M. Ruiz, S. Shapiro
- Physics, Medicine
- Physical review. D.
- 8 January 2018

We perform magnetohydrodynamic simulations in full general relativity of disk accretion onto nonspinning black hole binaries with mass ratio q = 29/36. We survey different disk models which differ in… Expand

Outer boundary conditions for Einstein's field equations in harmonic coordinates

- M. Ruiz, O. Rinne, O. Sarbach
- Physics
- 18 July 2007

We analyze Einstein's vacuum field equations in generalized harmonic coordinates on a compact spatial domain with boundaries. We specify a class of boundary conditions, which is constraint-preserving… Expand

Multiple expansions for energy and momenta carried by gravitational waves

- M. Ruiz, M. Alcubierre, D. Núñez, R. Takahashi
- Physics
- 31 July 2007

We present expressions for the energy, linear momentum and angular momentum carried away from an isolated system by gravitational radiation based on spin-weighted spherical harmonics decomposition of… Expand

The role of the ergosphere in the Blandford–Znajek process

- M. Ruiz, C. Palenzuela, F. Galeazzi, C. Bona
- Physics
- 19 March 2012

The Blandford-Znajek process, one of the most promising model for powering the relativistic jets from black holes, was initially introduced as a mechanism in which the magnetic fields extract energy… Expand

Pulsar spin-down luminosity: Simulations in general relativity

- M. Ruiz, V. Paschalidis, S. Shapiro
- Physics
- 21 February 2014

Adopting our new method for matching general relativistic, ideal magnetohydrodynamics to its force-free limit, we perform the first systematic simulations of force-free pulsar magnetospheres in… Expand

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