Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Magnetoacoustic and Alfve'nic Black Holes with Hawking Radiation at
  Horizons Made of Magnephonons and Alphonons   We introduce analogue black holes (BHs) based on ideal magnetohydrodynamic
equations. Similar to acoustic BHs, which trap phonons and emit Hawking
radiation (HR) at the sonic horizon where the flow speed changes from super- to
sub-sonic, in the horizon of magnetoacoustic and Alfv\'{e}nic BHs, the
magnetoacoustic and Alfve'n waves will be trapped and emit HR made of quantized
vibrations similar to phonons which we call magnephonons and Alphonons. We
proposed that magnetoacoustic and Alfve'nic BHs may be created in the
laboratory using a tube with variable cross section embedded in a uniform
magnetic field, and a super-magnetoacoustic or a super-Alfve'nic flow. We show
that the Hawking temperature for both BHs is a function of the background
magnetic field, number density of fluid, and radius of the tube. For a typical
setup, the temperature is estimated to be about 0.0266 K.

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The categories of this paper are: quant-ph
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The categories of this paper are: adap-org
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The categories of this paper are: eess
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The categories of this paper are: mtrl-th
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The categories of this paper are: supr-con
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The categories of this paper are: dg-ga
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The categories of this paper are: nlin
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The categories of this paper are: patt-sol
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The categories of this paper are: nucl-th
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The categories of this paper are: math
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The categories of this paper are: chem-ph
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The categories of this paper are: funct-an
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The categories of this paper are: acc-phys
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The categories of this paper are: chao-dyn
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The categories of this paper are: ao-sci
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The categories of this paper are: atom-ph