Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Radiative Efficiency of Collisionless Accretion   Radiative efficiency of a slowly accreting black hole is estimated using a
two-temperature model of accretion. The radiative efficiency depends on the
magnetic field strength near the Schwarzschild radius. For weak magnetic fields
(magnetic energy=equipartition/1000), the low efficiency 0.0001 assumed in some
theoretical models might be achieved. For stronger fields, a significant
fraction of viscous heat is dissipated by electrons and radiated away resulting
in a larger efficiency. At equipartition magnetic fields, we estimate
efficiency = of order 10%.

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The categories of this paper are: ao-sci
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The categories of this paper are: math-ph
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The categories of this paper are: funct-an
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The categories of this paper are: gr-qc
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The categories of this paper are: cmp-lg
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The categories of this paper are: chao-dyn
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The categories of this paper are: econ
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The categories of this paper are: supr-con
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The categories of this paper are: stat
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The categories of this paper are: alg-geom
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The categories of this paper are: patt-sol
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The categories of this paper are: nucl-ex
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The categories of this paper are: eess
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The categories of this paper are: bayes-an
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The categories of this paper are: mtrl-th
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The categories of this paper are: hep-th