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Kinematic structures found with Gaia DR1/TGAS and RAVE data in the Solar neighbourhood

Published online by Cambridge University Press:  02 August 2018

I. Kushniruk Open the ORCID record for I. Kushniruk [Opens in a new window] ,
T. Schirmer  and
T. Bensby
I. Kushniruk
Affiliation:
Lund Observatory, Box 43, SE-221 00 Lund, Sweden
T. Schirmer
Affiliation:
Lund Observatory, Box 43, SE-221 00 Lund, Sweden
T. Bensby
Affiliation:
Lund Observatory, Box 43, SE-221 00 Lund, Sweden
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Abstract

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With the much enlarged stellar sample of 55 831 stars and much increased precision in distances, proper motions, provided by Gaia DR1 TGAS we have shown with the help of the wavelet analysis that the velocity distribution of stars in the Solar neighbourhood contains more kinematic structures than previously known. We detect 19 kinematic structures between scales 3-16 km s−1 at the 3σ confidence level. Among them we identified well-known groups (such as Hercules, Sirius, Coma Berenices, Pleiades, and Wolf 630). We confirmed recently detected groups (such as Antoja12 and Bobylev16). In addition we report here about a new kinematic structure at (U, V) ≈ (37, 8) km s−1. Another three new groups are tentatively detected, but require confirmation.

Keywords

Galaxy: formationGalaxy: evolutionGalaxy: structureStars: kinematics and dynamics
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 13 , Symposium S334: Rediscovering our Galaxy , July 2017 , pp. 323 - 324
Copyright
Copyright © International Astronomical Union 2018 

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