Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cresting the wave: Proper motions of the Eastern Banded Structure   We study the kinematic properties of the Eastern Banded Structure (EBS) and
Hydra I overdensity using exquisite proper motions derived from the Sloan
Digital Sky Survey (SDSS) and Gaia source catalog. Main sequence turn-off stars
in the vicinity of the EBS are identified from SDSS photometry; we use the
proper motions and, where applicable, spectroscopic measurements of these stars
to probe the kinematics of this apparent stream. We find that the EBS and Hydra
I share common kinematic and chemical properties with the nearby Monoceros
Ring. In particular, the proper motions of the EBS, like Monoceros, are
indicative of prograde rotation (V_phi ~ 180-220 km/s), which is similar to the
Galactic thick disc. The kinematic structure of stars in the vicinity of the
EBS suggest that it is not a distinct stellar stream, but rather marks the
"edge" of the Monoceros Ring. The EBS and Hydra I are the latest substructures
to be linked with Monoceros, leaving the Galactic anti-centre a mess of
interlinked overdensities which likely share a unified, Galactic disc origin.

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The categories of this paper are: math
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The categories of this paper are: physics
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The categories of this paper are: adap-org
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The categories of this paper are: acc-phys
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The categories of this paper are: quant-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: nlin
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The categories of this paper are: bayes-an
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The categories of this paper are: stat
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The categories of this paper are: eess
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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: hep-lat
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The categories of this paper are: econ
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The categories of this paper are: plasm-ph
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The categories of this paper are: supr-con