Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Discovery of two neighboring satellites in the Carina constellation with
  MagLiteS   We report the discovery of two ultra-faint satellites in the vicinity of the
Large Magellanic Cloud (LMC) in data from the Magellanic Satellites Survey
(MagLiteS). Situated 18$^{\circ}$ ($\sim 20$ kpc) from the LMC and separated
from each other by only $18^\prime$, Carina~II and III form an intriguing pair.
By simultaneously modeling the spatial and the color-magnitude stellar
distributions, we find that both Carina~II and Carina~III are likely dwarf
galaxies, although this is less clear for Carina~III. There are in fact several
obvious differences between the two satellites. While both are well described
by an old and metal poor population, Carina~II is located at $\sim 36$ kpc from
the Sun, with $M_V\sim-4.5$ and $r_h\sim 90$ pc, and it is further confirmed by
the discovery of 3 RR Lyrae at the right distance. In contrast, Carina~III is
much more elongated, measured to be fainter ($M_V\sim-2.4$), significantly more
compact ($r_h\sim30$ pc), and closer to the Sun, at $\sim 28$ kpc, placing it
only 8 kpc away from Car~II. Together with several other systems detected by
the Dark Energy Camera, Carina~II and III form a strongly anisotropic cloud of
satellites in the vicinity of the Magellanic Clouds.

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The categories of this paper are: atom-ph
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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: chem-ph
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The categories of this paper are: hep-ex
10
The categories of this paper are: q-bio
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The categories of this paper are: alg-geom
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The categories of this paper are: cs
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The categories of this paper are: supr-con
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The categories of this paper are: math
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The categories of this paper are: solv-int
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The categories of this paper are: nucl-ex
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The categories of this paper are: chao-dyn
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The categories of this paper are: stat
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The categories of this paper are: nlin
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The categories of this paper are: mtrl-th