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标题：Hyades tidal tails revealed by Gaia DR2 ⋆ ⋆⋆
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作者：Siegfried Röser ; Elena Schilbach ; Bertrand Goldman 等
期刊名称：Astronomy & Astrophysics
印刷版ISSN：0004-6361
电子版ISSN：1432-0746
出版年度：2019
卷号：621
DOI：10.1051/0004-6361/201834608
语种：English
出版社：EDP Sciences
摘要：Aims. Within a 200 pc sphere around the Sun, we search for the Hyades tidal tails in theGaiaDR2 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.
关键词：enparallaxesproper motionsopen clusters and associations: generalopen clusters and associations: individual: Hyades