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Milton Ruiz

Theoretical Astrophysicist &
Numerical Relativist

Binary Neutron Star Mergers

The GW detection GW170817 coincident with EM counterpart radiation across the EM spectrum provide the best confirmation so far that compact binary mergers, in which at least one of the binary companions is a neutron star, can be the progenitors of sGRBs, as anticipated in the 90's. I have recently confirmed this possibility by self-consistent simulations in full GRMHD of merging NSBH binaries and merging neutron star binaries modeled as Γ = 2-polytropes that undergo delayed collapse following merger. The lifetime of the jets and their outgoing Poynting luminosities [Ljet ~ 1052 erg/s] are consistent with typical sGRBs, as well as with the Blandford–Znajek mechanism for launching jets and their associated Poynting luminosities.

Selected Publications

  • Jet Launching from Merging Magnetized Binary Neutron Stars with Realistic Equations of State
    Milton Ruiz, Antonios Tsokaros, Stuart L. Shapiro
    Phys. Rev. D 104, 124049 (2021) • e-Print: 2110.11968 [astro-ph.HE]

  • Effects of spin on magnetized binary neutron star mergers and jet launching
    Milton Ruiz, Antonios Tsokaros, Vasileios Paschalidis, Stuart L. Shapiro
    Phys. Rev. D 99 (2019) 8, 084032 • e-Print: 1902.08636 [astro-ph.HE]

  • Are fast radio bursts the most likely electromagnetic counterpart of neutron star mergers resulting in prompt collapse?
    Vasileios Paschalidis, Milton Ruiz
    Phys.Rev.D 100 (2019) 4, 043001 • e-Print: 1808.04822 [astro-ph.HE]

  • GW170817, General Relativistic Magnetohydrodynamic Simulations, and the Neutron Star Maximum Mass
    Milton Ruiz, Stuart L. Shapiro, Antonios Tsokaros
    Phys.Rev.D 97 (2018) 2, 021501 • e-Print: 1711.00473 [astro-ph.HE]

  • Binary Neutron Star Mergers: a jet Engine for Short Gamma-ray Bursts
    Milton Ruiz, Ryan N. Lang, Vasileios Paschalidis, Stuart L. Shapiro
    Astrophys. J. Lett. 824 (2016) 1, L6 • e-Print: 1604.02455 [astro-ph.HE]

  • Multimessenger Binary Mergers Containing Neutron Stars: Gravitational Waves, Jets, and γ-Ray Bursts
    Milton Ruiz, Stuart L. Shapiro, Antonios Tsokaros
    Front. Astron. Space Sci. 8 (2021) 39 • e-Print: 2102.03366 [astro-ph.HE]