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Open Cluster Dynamics via Fundamental Plane

Published online by Cambridge University Press:  07 March 2018

Chien-Cheng Lin  and
Xiao-Ying Pang
Chien-Cheng Lin
Affiliation:
Shanghai Astronomical Observatory, 80 Nandan Rd. 200030 Shanghai, China Max Planck Institute for Astronomy, Königstuhl 17, 69117 Heidelberg, Germany email: cclin@mpia.de
Xiao-Ying Pang
Affiliation:
Shanghai Institute of Technology, 100 Haiquan Rd., 201418 Shanghai, China email: xypang@bao.ac.cn
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Abstract

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Open clusters (OCs) are important objects for stellar dynamics studies. The short survival timescale of OCs makes them closely related to the formation of Galactic field stars. We motivate to investigate the dynamical evolution of OCs on the aspect of internal effect and the external influence. Firstly, we make use of the known OC catalog to obtain OCs masses, effective radii. Additionally, we estimate OCs kinematics properties by OC members cross-matched with radial velocity and metallicity from SDSSIV/APOGEE2. We then establish the fundamental plane of OCs based on the radial velocity dispersion, the effective radius, and average surface brightness. The deviation of the fundamental plane from the Virial Plane, so called the tilt, and the r.m.s. dispersion of OCs around the average plane are used to indicate the dynamical status of OCs. Parameters of the fitted plane will vary with cluster age and distance.

Keywords

(Galaxy:) open clusters and associations: general
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S330: Astrometry and Astrophysics in the Gaia sky , April 2017 , pp. 233 - 234
Copyright
Copyright © International Astronomical Union 2018 

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