Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Triaxial Deformation and Asynchronous Rotation of Rocky Planets in the
  Habitable Zone of Low-Mass Stars   Rocky planets orbiting M-dwarf stars in the habitable zone tend to be driven
to synchronous rotation by tidal dissipation, potentially causing difficulties
for maintaining a habitable climate on the planet. However, the planet may be
captured into asynchronous spin-orbit resonances, and this capture may be more
likely if the planet has a sufficiently large intrinsic triaxial deformation.
We derive the analytic expression for the maximum triaxiality of a rocky
planet, with and without a liquid envelope, as a function of the planet's
radius, density, rigidity and critical strain of fracture. The derived maximum
triaxiality is consistent with the observed triaxialities for terrestrial
planets in the solar system, and indicates that rocky planets in the habitable
zone of M-dwarfs can in principle be in a state of asynchronous spin-orbit
resonances.

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The categories of this paper are: supr-con
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The categories of this paper are: funct-an
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The categories of this paper are: nucl-th
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The categories of this paper are: chao-dyn
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The categories of this paper are: quant-ph
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The categories of this paper are: q-alg
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The categories of this paper are: bayes-an
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The categories of this paper are: dg-ga
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The categories of this paper are: cond-mat
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The categories of this paper are: eess
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The categories of this paper are: hep-th
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The categories of this paper are: stat
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The categories of this paper are: mtrl-th
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The categories of this paper are: cs
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The categories of this paper are: gr-qc
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The categories of this paper are: nucl-ex