| Issue |
A&A
Volume 621, January 2019
|
|
|---|---|---|
| Article Number | L2 | |
| Number of page(s) | 5 | |
| Section | Letters to the Editor | |
| DOI | https://doi.org/10.1051/0004-6361/201834608 | |
| Published online | 04 January 2019 | |
Letter to the Editor
Hyades tidal tails revealed by Gaia DR2⋆,⋆⋆
1
Zentrum für Astronomie der Universität Heidelberg, Landessternwarte, Königstuhl 12, 69117 Heidelberg, Germany
2
Zentrum für Astronomie der Universität Heidelberg, Astronomisches Rechen-Institut, Mönchhofstraße 12-14, 69120 Heidelberg, Germany
e-mail: roeser@ari.uni-heidelberg.de, elena@ari.uni-heidelberg.de
3
Max-Planck-Institut für Astronomie, Königstuhl 17, 69117 Heidelberg, Germany
e-mail: goldman@mpia.de
4
Observatoire Astronomique de Strasbourg, Université de Strasbourg – CNRS UMR 7550, 11 rue de l’Université, 67000 Strasbourg, France
Received:
8
November
2018
Accepted:
30
November
2018
Aims. Within a 200 pc sphere around the Sun, we search for the Hyades tidal tails in the Gaia DR2 dataset.
Methods. We used a modified convergent-point method to search for stars with space velocities close to the space velocity of the Hyades cluster.
Results. We find a clear indication for the existence of the Hyades tidal tails, a leading tail extending up to 170 pc from the centre of the Hyades with 292 stars (36 contaminants), and a trailing tail up to 70 pc with 237 stars (32 contaminants). A comparison with an N-body model of the cluster and its tails shows remarkably good coincidence. Five white dwarfs are found in the tails.
Key words: parallaxes / proper motions / open clusters and associations: general / open clusters and associations: individual: Hyades
We acknowledge the simultaneous publication by Meingast & Alves (2019), who also used Gaia DR2 to present evidence for the existence of the Hyades’s tidal tails. The authors of both publications did not know about each other’s work and arrived at their conclusions independently.
The data of all 1316 stars from Fig. 3 are only available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/621/L2
© ESO 2019
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