Kinematic modelling of clusters with Gaia: the death throes of the Hyades

@article{Oh2020KinematicMO,
  title={Kinematic modelling of clusters with Gaia: the death throes of the Hyades},
  author={Semyeong Oh and Neil Wyn Evans},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2020}
}
  • S. Oh, N. W. Evans
  • Published 6 July 2020
  • Physics
  • Monthly Notices of the Royal Astronomical Society
The precision of the Gaia data offers a unique opportunity to study the internal velocity field of star clusters. We develop and validate a forward-modelling method for the internal motions of stars in a cluster. The model allows an anisotropic velocity dispersion matrix and linear velocity gradient describing rotation and shear, combines radial velocities available for a subset of stars, and accounts for contamination from background sources via a mixture model. We apply the method to Gaia DR2… Expand

Figures and Tables from this paper

Revisiting the Fundamental Parameters of 49 New Star Clusters in Gaia DR2
Reliable fundamental parameters of star clusters such as distance modulus, metallicity, age, extinction, and binary fraction are of key importance for astrophysical studies. Although a lot of newExpand
Gaia Early Data Release 3
We produce a clean and well-characterised catalogue of objects within 100\,pc of the Sun from the \G\ Early Data Release 3. We characterise the catalogue through comparisons to the full data release,Expand
The 800 pc long tidal tails of the Hyades star cluster
The tidal tails of stellar clusters provide an important tool for studying the birth conditions of the clusters and their evolution, coupling, and interaction with the Galactic potential. The GaiaExpand

References

SHOWING 1-10 OF 84 REFERENCES
Galactic Dynamics: Second Edition
The Hipparcos – Gaia Catalog of Accelerations
This paper presents a cross-calibrated catalog of Hipparcos and Gaia astrometry to enable their use in measuring changes in proper motion, i.e., accelerations in the plane of the sky. The finalExpand
Galactic rotation in Gaia DR1
The spatial variations of the velocity field of local stars provide direct evidence of Galactic differential rotation. The local divergence, shear, and vorticity of the velocity field---theExpand
  • Ann. Astrophys.
  • 1961
Rank-Normalization, Folding, and Localization: An Improved Rˆ for Assessing Convergence of MCMC (with Discussion)
Markov chain Monte Carlo is a key computational tool in Bayesian statistics, but it can be challenging to monitor the convergence of an iterative stochastic algorithm. In this paper we show that theExpand
SciPy 1.0: fundamental algorithms for scientific computing in Python
TLDR
An overview of the capabilities and development practices of SciPy 1.0 is provided and some recent technical developments are highlighted. Expand
Unresolved stellar companions with Gaia DR2 astrometry
For stars with unresolved companions, motions of the centre of light and that of mass decouple, causing a single-source astrometric model to perform poorly. We show that such stars can be easilyExpand
  • 2019
  • 2019
  • A&A
  • 2019
...
1
2
3
4
5
...