Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Fast litho-panspermia in the habitable zone of the TRAPPIST-1 system   With several short-period, Earth-mass planets in the habitable zone, the
TRAPPIST-1 system potentially allows litho-panspermia to take place on very
short timescales. We investigate the efficiency and speed of inter-planetary
material transfer resulting from impacts onto the habitable zone planets. By
simulating trajectories of impact ejecta from their moment of ejection until
(re-)accretion, we find that transport between the habitable zone planets is
fastest for ejection velocities around and just above planetary escape
velocity. At these ejection velocities, ${\sim}10\%$ of the ejected material
reaches another habitable zone planet within $10^2\mathrm{~yr}$, indicating
litho-panspermia can be 4 to 5 orders of magnitude faster in TRAPPIST-1 than in
the Solar System.

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The categories of this paper are: physics
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The categories of this paper are: math-ph
27
The categories of this paper are: comp-gas
2
The categories of this paper are: math
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The categories of this paper are: dg-ga
26
The categories of this paper are: bayes-an
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The categories of this paper are: hep-ex
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The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
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The categories of this paper are: nlin
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The categories of this paper are: econ
34
The categories of this paper are: chem-ph
32
The categories of this paper are: atom-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: alg-geom
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The categories of this paper are: cs