Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Equation of Motion for an Arbitrarily Shaped Particle Moving in a
  Radiation Field   We consider the motion of uncharged dust grains of arbitrary shape including
the effects of electromagnetic radiation and thermal emission. The resulting
relativistically covariant equation of motion is expressed in terms of standard
optical parameters. Explicit expressions for secular changes of osculating
orbital elements are derived in detail for the special case of the
Poynting-Robertson effect. Two subcases are considered: (i) central
acceleration due to gravity and the radial component of radiation pressure
independent of the particle velocity, (ii) central acceleration given by
gravity and the radiation force as the disturbing force. The latter case yields
results which may be compared with secular orbital evolution in terms of
orbital elements for an arbitrarily shaped dust particle. The effects of solar
wind are also presented.

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The categories of this paper are: bayes-an
5
The categories of this paper are: gr-qc
15
The categories of this paper are: nucl-ex
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The categories of this paper are: dg-ga
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The categories of this paper are: plasm-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: patt-sol
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The categories of this paper are: funct-an
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The categories of this paper are: hep-ex
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The categories of this paper are: cs
3
The categories of this paper are: physics
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The categories of this paper are: solv-int
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The categories of this paper are: ao-sci
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The categories of this paper are: hep-lat
18
The categories of this paper are: econ
37
The categories of this paper are: supr-con