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RELATIVISTIC SIMULATIONS OF BLACK HOLE-NEUTRON STAR COALESCENCE: THE JET EMERGES.
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RELATIVISTIC SIMULATIONS OF BLACK HOLE-NEUTRON STAR COALESCENCE: THE JET EMERGES.
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| dc.contributor.author | Paschalidis, Vasileios | |
| dc.contributor.author | Ruiz Meneses, Milton Javier | |
| dc.contributor.author | Shapiro, Stuart L. | |
| dc.date.accessioned | 2023-06-02T07:24:59Z | |
| dc.date.available | 2023-06-02T07:24:59Z | |
| dc.date.issued | 2015 | |
| dc.identifier.citation | Paschalidis, Vasileios Ruiz Meneses, Milton Javier Shapiro, Stuart L. 2015 RELATIVISTIC SIMULATIONS OF BLACK HOLE-NEUTRON STAR COALESCENCE: THE JET EMERGES. Astrophysical Journal Letters 806 1 1º 5 | |
| dc.identifier.uri | https://hdl.handle.net/10550/87638 | |
| dc.description.abstract | We perform magnetohydrodynamic simulations in full general relativity (GRMHD) of a binary black hole-neutron star (BHNS) on a quasicircular orbit that undergoes merger. The binary mass ratio is 3:1, the black hole initial spin parameter $a/m=0.75$ (m is the black hole Christodoulou mass) aligned with the orbital angular momentum, and the neutron star is an irrotational ${\Gamma }=2$ polytrope. About two orbits prior to merger (at time $t={{t}_{B}}$), we seed the neutron star with a dynamically weak interior dipole magnetic field that extends into the stellar exterior. At $t={{t}_{B}}$, the exterior has a low-density atmosphere with a constant plasma parameter $\beta \equiv {{P}_{{\rm gas}}}/{{P}_{{\rm mag}}}$. Varying β at tB in the exterior from 0.1 to 0.01, we find that at a time $\sim 4000M\sim 100({{M}_{{\rm NS}}}/1.4{{M}_{\odot }})\;{\rm ms}$ (M is the total (ADM) mass) following the onset of accretion of tidally disrupted debris, magnetic winding above the remnant black hole poles builds up the magnetic field sufficiently to launch a mildly relativistic, collimated outflow¿an incipient jet. The duration of the accretion and the lifetime of the jet is ${\Delta }t\sim 0.5({{M}_{{\rm NS}}}/1.4{{M}_{\odot }})$ s. Our simulations furnish the first explicit examples in GRMHD that show that a jet can emerge following a BHNS merger. | |
| dc.language.iso | eng | |
| dc.relation.ispartof | Astrophysical Journal Letters, 2015, vol. 806, num. 1, p. 1º-5 | |
| dc.subject | Astronomia | |
| dc.subject | Astrofísica | |
| dc.title | RELATIVISTIC SIMULATIONS OF BLACK HOLE-NEUTRON STAR COALESCENCE: THE JET EMERGES. | |
| dc.type | journal article | |
| dc.date.updated | 2023-06-02T07:24:59Z | |
| dc.identifier.doi | 10.1088/2041-8205/806/1/L14 | |
| dc.identifier.idgrec | 160071 | |
| dc.rights.accessRights | open access |
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