Tidal tails of open clusters Virtual Observatory Resource

Authors
  1. Kos J.
  2. Published by
    CDS
Abstract

Open clusters that emerged from the star forming regions as gravitationally bound structures are subjected to star evaporation, ejection, and tidal forces throughout the rest of their lives. Consequently they form tidal tails that can stretch kiloparsecs along the cluster's orbit. Cluster members are typically found by searching for overdensities in some parameter space (positions and velocities or sometimes actions and orbital parameters of stars). However, this method is not effective in identifying stars located in the tidal tails far from the open cluster cores. We present a probabilistic method for finding distant cluster members without relying on searching for overdensities and apply it to 476 open clusters. First, we simulate the dissolution of a cluster and obtain a probability distribution (likelihood) describing where cluster members are to be found. The distribution of stars from the Gaia DR3 catalogue in high likelihood regions is then compared to the simulated stellar population of the Galaxy to define the membership probability of each star. The survey of cluster members included all stars with a magnitude of G<17.5 and larger clusters with an age of >100Myr within 3kpc from the Sun. We successfully find stars with high membership probabilities in the tidal tails of most clusters, stretching more than a kiloparsec from the cluster cores in some cases. We analyse the morphological properties of tidal tails, demonstrate how properly normalised membership probabilities aid systematic studies of open clusters and publish a catalogue of stars found in the tidal tails.

Keywords
  1. open-star-clusters
  2. stellar-associations
  3. visible-astronomy
  4. proper-motions
  5. trigonometric-parallax
  6. radial-velocity
Bibliographic source Bibcode
2024A&A...691A..28K
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/691/A28
IVOA Identifier IVOID
ivo://CDS.VizieR/J/A+A/691/A28

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/691/A28
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/691/A28
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/691/A28
IVOA Table Access TAP
http://tapvizier.cds.unistra.fr/TAPVizieR/tap
Run SQL-like queries with TAP-enabled clients (e.g., TOPCAT).
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/691/A28/clusters?
https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/691/A28/clusters?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/691/A28/clusters?
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/691/A28/members?
https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/691/A28/members?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/691/A28/members?

History

2024-10-29T07:35:26Z
Resource record created
2024-10-29T06:39:48Z
Updated
2024-10-29T07:35:26Z
Created

Contact

Name
CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
E-Mail
cds-question@unistra.fr