Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005hia....13..383m&link_type=abstract
In: Highlights of Astronomy, Vol. 13, as presented at the XXVth General Assembly of the IAU - 2003 [Sydney, Australia, 13 - 26 J
Astronomy and Astrophysics
Astronomy
Dense Stellar Systems
Scientific paper
The three-dimensional structure and kinematics of the Hyades cluster as seen by Hipparcos are compared with realistic N-body simulations using the NBODY6 code. Stars are selected from the model in a way that resembles the Hipparcos observations of the cluster.
Attempts to detect a correlation between the velocity dispersion and cluster radius or stellar mass using observational data from the Hipparcos and Tycho-2 Catalogues are inconclusive but the fit of the N-body model to the observations of the cluster structure indicates that the current cluster velocity dispersion decreases from 0.35 km/s at the cluster centre to a minimum of 0.20 km/s at 8 pc radius (2-3 core radii) from where it slightly increases outwards. A clear negative correlation between dispersion and stellar mass is seen in the central part of the cluster but is almost absent beyond a radius of 3 pc.
With GAIA astrometry it will be possible to investigate the structure velocity field IMF binary properties etc. of the entire entire Hyades (excluding substellar objects). This detailed dynamical knowledge suggests that the Hyades can be used as a calibrator for N-body models in the future.
No associations
LandOfFree
An N-body model of the Hyades does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with An N-body model of the Hyades, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and An N-body model of the Hyades will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-805491