Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The California-Kepler Survey. IV. Metal-rich Stars Host a Greater
  Diversity of Planets   Probing the connection between a star's metallicity and the presence and
properties of any associated planets offers an observational link between
conditions during the epoch of planet formation and mature planetary systems.
We explore this connection by analyzing the metallicities of Kepler target
stars and the subset of stars found to host transiting planets. After
correcting for survey incompleteness, we measure planet occurrence: the number
of planets per 100 stars with a given metallicity $M$. Planet occurrence
correlates with metallicity for some, but not all, planet sizes and orbital
periods. For warm super-Earths having $P = 10-100$ days and $R_P =
1.0-1.7~R_E$, planet occurrence is nearly constant over metallicities spanning
$-$0.4 dex to +0.4 dex. We find 20 warm super-Earths per 100 stars, regardless
of metallicity. In contrast, the occurrence of warm sub-Neptunes ($R_P =
1.7-4.0~R_E$) doubles over that same metallicity interval, from 20 to 40
planets per 100 stars. We model the distribution of planets as $d f \propto
10^{\beta M} d M$, where $\beta$ characterizes the strength of any metallicity
correlation. This correlation steepens with decreasing orbital period and
increasing planet size. For warm super-Earths $\beta = -0.3^{+0.2}_{-0.2}$,
while for hot Jupiters $\beta = +3.4^{+0.9}_{-0.8}$. High metallicities in
protoplanetary disks may increase the mass of the largest rocky cores or the
speed at which they are assembled, enhancing the production of planets larger
than 1.7 $R_E$. The association between high metallicity and short-period
planets may reflect disk density profiles that facilitate the inward migration
of solids or higher rates of planet-planet scattering.

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The categories of this paper are: cmp-lg
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The categories of this paper are: patt-sol
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The categories of this paper are: atom-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: hep-lat
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The categories of this paper are: cond-mat
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The categories of this paper are: cs
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The categories of this paper are: q-fin
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The categories of this paper are: nucl-ex
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The categories of this paper are: stat
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The categories of this paper are: chao-dyn
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The categories of this paper are: math-ph
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The categories of this paper are: funct-an
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The categories of this paper are: math
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The categories of this paper are: quant-ph
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The categories of this paper are: comp-gas