SIMBAD references

2018MNRAS.477L..50G - Mon. Not. R. Astron. Soc., 477, L50-L54 (2018/June-2)

Three-dimensional structure of the Upper Scorpius association with the Gaia first data release.


Abstract (from CDS):

Using new proper motion data from recently published catalogues, we revisit the membership of previously identified members of the Upper Scorpius association. We confirmed 750 of them as cluster members based on the convergent point method, compute their kinematic parallaxes, and combined them with Gaia parallaxes to investigate the 3D structure and geometry of the association using a robust covariance method. We find a mean distance of 146 ± 3 ± 6 pc and show that the morphology of the association defined by the brightest (and most massive) stars yields a prolate ellipsoid with dimensions of 74 x 38 x 32 pc3, while the faintest cluster members define a more elongated structure with dimensions of 98 x 24 x 18 pc3. We suggest that the different properties of both populations are an imprint of the star formation history in this region.

Abstract Copyright: © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): methods: statistical - proper motions - stars: distances - Galaxy: kinematics and dynamics - open clusters and associations: individual: Upper Scorpius

VizieR on-line data: <Available at CDS (J/MNRAS/477/L50): table1.dat>

Simbad objects: 1321

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