Two chemically similar stellar overdensities on opposite sides of the plane of the Galactic disk

Maria Bergemann (), Branimir Sesar, Judith G. Cohen, Aldo M. Serenelli, Allyson Sheffield, Ting S. Li, Luca Casagrande, Kathryn V. Johnston, Chervin F. P. Laporte, Adrian M. Price-Whelan, Ralph Schönrich and Andrew Gould
Additional contact information
Maria Bergemann: Max Planck Institute for Astronomy
Branimir Sesar: Deutsche Börse AG
Judith G. Cohen: Mathematics, and Astronomy, California Institute of Technology
Aldo M. Serenelli: Institute of Space Sciences (ICE, CSIC), Carrer de Can Magrans
Allyson Sheffield: LaGuardia Community College, City University of New York
Ting S. Li: Fermi National Accelerator Laboratory
Luca Casagrande: Research School of Astronomy and Astrophysics, Mount Stromlo Observatory, The Australian National University
Kathryn V. Johnston: Columbia University
Chervin F. P. Laporte: Columbia University
Adrian M. Price-Whelan: Princeton University
Ralph Schönrich: Rudolf-Peierls Centre for Theoretical Physics, University of Oxford
Andrew Gould: Max Planck Institute for Astronomy

Nature, 2018, vol. 555, issue 7696, 334-337

Abstract: Fourteen stars from stellar overdensities above and below the Galactic disk have the same elemental abundances as disk stars, suggesting that these stars originated in the disk, perhaps being removed during interaction with passing dwarf galaxies.

Date: 2018
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DOI: 10.1038/nature25490

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