other query modes : |
Identifier query |
Coordinate query |
Criteria query |
Reference query |
Basic query |
Script submission |
TAP |
Output options |
Object types |
Help |
1999MNRAS.302....9C - Mon. Not. R. Astron. Soc., 302, 9-21 (1999/January-1)
The mass and dynamical state of Abell 2218.
CANNON D.B., PONMAN T.J. and HOBBS I.S.
Abstract (from CDS):
We find that a strongly non-isothermal model for the intracluster gas, which implies a central cusp in the cluster mass distribution, is consistent with the available X-ray data and compatible with the lensing results. At r<1 arcmin, there is strong evidence to suggest that the cluster departs from a simple relaxed model. We analyse the dynamics of the galaxies and find that the central galaxy velocity dispersion is too high to allow a physical solution for the galaxy orbits. The quality of the radio and X-ray data does not at present allow very restrictive constraints to be placed on H0. It is apparent that earlier analyses have underestimated the uncertainties involved. However, values greater than 50 km.s–1.Mpc–1 are preferred when lensing constraints are taken into account.
Abstract Copyright: 1998, Royal Astronomical Society
Journal keyword(s): galaxies: clusters: individual: A2218 - cosmic microwave background - dark matter - distance scale - gravitational lensing - X-rays: galaxies
Simbad objects: 2
To bookmark this query, right click on this link: simbad:1999MNRAS.302....9C and select 'bookmark this link' or equivalent in the popup menu