تقرير
Multi-Frequency General Relativistic Radiation-Magnetohydrodynamic Simulations of Thin Disks
| العنوان: | Multi-Frequency General Relativistic Radiation-Magnetohydrodynamic Simulations of Thin Disks |
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| المؤلفون: | Fragile, P. Chris, Anninos, Peter, Roth, Nathaniel, Mishra, Bhupendra |
| سنة النشر: | 2023 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - High Energy Astrophysical Phenomena |
| الوصف: | We present a set of six general relativistic, multi-frequency, radiation magnetohydrodynamic simulations of thin accretion disks with different target mass accretion rates around black holes with spins ranging from non-rotating to rapidly spinning. The simulations use the $\mathbf{M}_1$ closure scheme with twelve, independent frequency (or energy) bins ranging logarithmically from $5\times 10^{-3}$ to $5\times 10^3$ keV. The multi-frequency capability allows us to generate crude spectra and energy-dependent light curves directly from the simulations without a need for special post-processing. While we generally find roughly thermal spectra with peaks around 1 to 4 keV, our high-spin cases showed harder than expected tails for the soft or thermally dominant state. This leads to radiative efficiencies that are up to five times higher than expected for a Novikov-Thorne disk at the same spin. We attribute these high efficiencies to the high-energy, coronal emission. These coronae mostly occupy the effectively optically thin regions near the inner edges of the disks and also cover or sandwich the inner $\sim 15 GM/c^2$ of the disks. Comment: 15 pages, 8 figures |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2311.00028 |
| رقم الأكسشن: | edsarx.2311.00028 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |