Disk Emission from Magnetohydrodynamic Simulations of Spinning Black Holes (original) (raw)
ADS
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Abstract
We present the results of a new series of global, three-dimensional, relativistic magnetohydrodynamic (MHD) simulations of thin accretion disks around spinning black holes. The disks have aspect ratios of H/R∼ 0.05 and spin parameters of a/M=0,0.5,0.9, and 0.99. Using the ray-tracing code Pandurata, we generate broadband thermal spectra and polarization signatures from the MHD simulations. We find that the simulated spectra can be well fit with a simple, universal emissivity profile that better reproduces the behavior of the emission from the inner disk, compared to traditional analyses carried out using a Novikov-Thorne thin disk model. Finally, we show how spectropolarization observations can be used to convincingly break the spin-inclination degeneracy well known to the continuum-fitting method of measuring black hole spin.
Publication:
The Astrophysical Journal
Pub Date:
March 2016
DOI:
arXiv:
Bibcode:
Keywords:
- accretion;
- accretion disks;
- black hole physics;
- X-rays: binaries;
- Astrophysics - High Energy Astrophysical Phenomena
E-Print:
submitted to ApJ