Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: PRIMASS visits Hilda and Cybele groups   The Cybele and Hilda dynamical groups delimit the outer edge of the asteroid
belt. Their compositional distribution is a key element to constrain
evolutionary models of the Solar System. In this paper, we present a
compositional analysis of these populations using spectroscopic observations,
SDSS and NEOWISE data. As part of the PRIMASS (Primitive Asteroids
Spectroscopic Survey), we acquired visible spectra of 18 objects in Hilda or
Cybele groups with the Goodman High Throughput Spectrometer at the 4.1m SOAR
telescope and 20 near-IR spectra of Hilda objects with Near Infrared Camera
Spectrograph at the 3.56m TNG. The sample is enlarged with spectra taken from
the literature in order to increase our statistical analysis. The spectra were
inspected for aqueous alteration bands and other spectral features that can be
linked to compositional constraints. The analysis shows a continuous
distribution of compositions from the main-belt to the Cybele, Hilda and Trojan
regions. We also identify a population in the Trojans group not present in
Hilda or Cybele objects.

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The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
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The categories of this paper are: chao-dyn
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The categories of this paper are: bayes-an
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The categories of this paper are: nucl-ex
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The categories of this paper are: patt-sol
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The categories of this paper are: adap-org
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The categories of this paper are: dg-ga
3
The categories of this paper are: physics
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The categories of this paper are: stat
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The categories of this paper are: math-ph
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The categories of this paper are: ao-sci
12
The categories of this paper are: nucl-th
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The categories of this paper are: solv-int
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The categories of this paper are: econ