Accurate evolutions of inspiralling and magnetized neutron stars: Equal-mass binaries

Journal Article · Tue Feb 15 00:00:00 EST 2011 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.83.044014· OSTI ID:21504982

Giacomazzo, Bruno ^[1]; Rezzolla, Luciano ^[2]; Baiotti, Luca ^[3]

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1. Department of Astronomy, University of Maryland, College Park, Maryland (United States)
2. Max-Planck-Institut fuer Gravitationsphysik, Albert-Einstein-Institut, Potsdam (Germany)
3. Institute of Laser Engineering, Osaka University, Osaka (Japan)

By performing new, long and numerically accurate general-relativistic simulations of magnetized, equal-mass neutron-star binaries, we investigate the role that realistic magnetic fields may have in the evolution of these systems. In particular, we study the evolution of the magnetic fields and show that they can influence the survival of the hypermassive neutron star produced at the merger by accelerating its collapse to a black hole. We also provide evidence that, even if purely poloidal initially, the magnetic fields produced in the tori surrounding the black hole have toroidal and poloidal components of equivalent strength. When estimating the possibility that magnetic fields could have an impact on the gravitational-wave signals emitted by these systems either during the inspiral or after the merger, we conclude that for realistic magnetic-field strengths B < or approx. 10{sup 12} G such effects could be detected, but only marginally, by detectors such as advanced LIGO or advanced Virgo. However, magnetically induced modifications could become detectable in the case of small-mass binaries and with the development of gravitational-wave detectors, such as the Einstein Telescope, with much higher sensitivities at frequencies larger than {approx_equal}2 kHz.

• OSTI ID: 21504982
• Journal Information: Physical Review. D, Particles Fields, Vol. 83, Issue 4; Other Information: DOI: 10.1103/PhysRevD.83.044014; (c) 2011 American Institute of Physics; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BINARY STARS
BLACK HOLES
EVOLUTION
GRAVITATIONAL WAVE DETECTORS
GRAVITATIONAL WAVES
MAGNETIC FIELDS
MASS
MODIFICATIONS
NEUTRON STARS
RELATIVISTIC RANGE
SENSITIVITY
SIMULATION
TELESCOPES
ENERGY RANGE
MEASURING INSTRUMENTS
RADIATION DETECTORS
STARS