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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Author(s):
Galli, Phillip A. B. [1] ; Joncour, Isabelle [2, 3] ; Moraux, Estelle [3]
Total Authors: 3
Affiliation:
[1] Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, Rua Matao 1226, Cidade Univ, BR-05508900 Sao Paulo, SP - Brazil
[2] Univ Maryland, Dept Astron, College Pk, MD 20742 - USA
[3] Univ Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble - France
Total Affiliations: 3
Document type: Journal article
Source: Monthly Notices of the Royal Astronomical Society; v. 477, n. 1, p. L50-L54, JUN 2018.
Web of Science Citations: 6
Abstract

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 pc(3), while the faintest cluster members define a more elongated structure with dimensions of 98 x 24 x 18 pc(3). We suggest that the different properties of both populations are an imprint of the star formation history in this region. (AU)

FAPESP's process: 15/14696-2 - Complementing Gaia from the ground with the dance survey in nearby star-forming regions
Grantee:Phillip Andreas Brenner Galli
Support type: Scholarships abroad - Research Internship - Post-doctor
FAPESP's process: 13/04934-8 - Kinematics and evolution of pre-main sequence stars in nearby star-forming regions
Grantee:Phillip Andreas Brenner Galli
Support type: Scholarships in Brazil - Post-Doctorate