Skip to main content

Research Repository

Advanced Search

Cresting the wave: proper motions of the Eastern Banded Structure

Deason, A.J.; Belokurov, V.; Koposo, v S.E.

Cresting the wave: proper motions of the Eastern Banded Structure Thumbnail


Authors

V. Belokurov

v S.E. Koposo



Abstract

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 catalogue. 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 (Vϕ ∼ 180–220 km s−1), which is similar to the Galactic thick disc. The kinematic structure of stars in the vicinity of the EBS suggests 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.

Citation

Deason, A., Belokurov, V., & Koposo, V. S. (2018). Cresting the wave: proper motions of the Eastern Banded Structure. Monthly Notices of the Royal Astronomical Society, 473(2), 2428-2433. https://doi.org/10.1093/mnras/stx2528

Journal Article Type Article
Acceptance Date Sep 27, 2017
Online Publication Date Sep 26, 2017
Publication Date Jan 11, 2018
Deposit Date Jan 15, 2018
Publicly Available Date Mar 28, 2024
Journal Monthly Notices of the Royal Astronomical Society
Print ISSN 0035-8711
Electronic ISSN 1365-2966
Publisher Royal Astronomical Society
Peer Reviewed Peer Reviewed
Volume 473
Issue 2
Pages 2428-2433
DOI https://doi.org/10.1093/mnras/stx2528

Files

Published Journal Article (899 Kb)
PDF

Copyright Statement
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society © 2017. The Authors.
Published by Oxford University Press on behalf of the Royal Astronomical Society.





You might also like



Downloadable Citations