Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A giant exoplanet orbiting a very low-mass star challenges planet
  formation models   Statistical analyses from exoplanet surveys around low-mass stars indicate
that super-Earth and Neptune-mass planets are more frequent than gas giants
around such stars, in agreement with core accretion theory of planet formation.
Using precise radial velocities derived from visual and near-infrared spectra,
we report the discovery of a giant planet with a minimum mass of 0.46 Jupiter
masses in an eccentric 204-day orbit around the very low-mass star GJ 3512.
Dynamical models show that the high eccentricity of the orbit is most likely
explained from planet-planet interactions. The reported planetary system
challenges current formation theories and puts stringent constraints on the
accretion and migration rates of planet formation and evolution models,
indicating that disc instability may be more efficient in forming planets than
previously thought.

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The categories of this paper are: eess
20
The categories of this paper are: acc-phys
4
The categories of this paper are: cond-mat
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The categories of this paper are: econ
25
The categories of this paper are: patt-sol
1
The categories of this paper are: cs
24
The categories of this paper are: dg-ga
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The categories of this paper are: hep-th
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The categories of this paper are: mtrl-th
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The categories of this paper are: bayes-an
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The categories of this paper are: adap-org
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The categories of this paper are: hep-lat
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The categories of this paper are: solv-int
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The categories of this paper are: quant-ph
3
The categories of this paper are: physics
30
The categories of this paper are: q-alg