Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Migration-driven diversity of super-Earth compositions   A leading model for the origin of super-Earths proposes that planetary
embryos migrate inward and pile up on close-in orbits. As large embryos are
thought to preferentially form beyond the snow line, this naively predicts that
most super-Earths should be very water-rich. Here we show that the
shortest-period planets formed in the migration model are often purely rocky.
The inward migration of icy embryos through the terrestrial zone accelerates
the growth of rocky planets via resonant shepherding. We illustrate this
process with a simulation that provided a match to the Kepler-36 system of two
planets on close orbits with very different densities. In the simulation, two
super-Earths formed in a Kepler-36-like configuration; the inner planet was
pure rock while the outer one was ice-rich. We conclude from a suite of
simulations that the feeding zones of close-in super-Earths are likely to be
broad and disconnected from their final orbital radii.

31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio
18
The categories of this paper are: econ
37
The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg
5
The categories of this paper are: gr-qc
14
The categories of this paper are: math-ph
3
The categories of this paper are: physics
2
The categories of this paper are: math
11
The categories of this paper are: hep-lat
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The categories of this paper are: eess
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The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex
20
The categories of this paper are: acc-phys