Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Formation of polar terrestrial circumbinary planets   All circumbinary planets currently detected are in orbits that are almost
coplanar to the binary orbit. While misaligned circumbinary planets are more
difficult to detect, observations of polar aligned circumbinary gas and debris
disks around eccentric binaries suggest that polar planet formation may be
possible. A polar aligned planet has a stable orbit that is inclined by 90
degrees to the orbital plane of the binary with an angular momentum vector that
is aligned to the binary eccentricity vector. With n- body simulations we model
polar terrestrial planet formation using hydrodynamic gas disk simulations to
motivate the initial particle distribution. Terrestrial planet formation around
an eccentric binary is more likely in a polar alignment than in a coplanar
alignment. Similar planetary systems form in a polar alignment around an
eccentric binary and a coplanar alignment around a circular binary. The polar
planetary systems are stable even with the effects of general relativity.
Planetary orbits around an eccentric binary exhibit tilt and eccentricity
oscillations at all inclinations, however, the oscillations are larger in the
coplanar case than the polar case. We suggest that polar aligned terrestrial
planets will be found in the future.

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The categories of this paper are: hep-th
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The categories of this paper are: hep-ph
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The categories of this paper are: q-fin
3
The categories of this paper are: physics
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The categories of this paper are: cs
30
The categories of this paper are: q-alg
31
The categories of this paper are: ao-sci
35
The categories of this paper are: mtrl-th
29
The categories of this paper are: funct-an
23
The categories of this paper are: solv-int
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The categories of this paper are: patt-sol
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The categories of this paper are: nlin
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The categories of this paper are: cond-mat
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The categories of this paper are: chao-dyn
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The categories of this paper are: cmp-lg
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The categories of this paper are: nucl-th