The Distribution of Dark Matter in the A:2256 Cluster

Details The Distribution of Dark Matter in the A:2256 Cluster The Distribution of Dark Matter in the A:2256 Cluster

Apr 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...271..413h&link_type=abstract

Astronomy and Astrophysics, Vol.271, NO. 2/APR, P. 413, 1993

Astronomy and Astrophysics

Astrophysics

75

Scientific paper

Using spatially resolved X-ray spectroscopy, we have determined that the X-ray emitting gas in the rich cluster A2256 is nearly isothermal to a radius of at least 0.76 h^-1^ Mpc, or about three core radii. These data can be used to measure the distribution of the dark matter in the cluster. We find that the total mass interior to 0.76 h^-1^ Mpc and 1.5 h^-1^ Mpc is (0.5 +/- 0.1 and 1.0 +/- 0.5) x 10^15^ h^-1^ M_sun_ respectively where the errors encompass the full range allowed by all models that we have fit to our data. Thus the mass appropriate to the region where we have spectral information is well determined, but the uncertainties become rather large upon extrapolating beyond that region. We also find that the galaxy orbits are mildly anisotropic which may cause the β discrepancy in this cluster.

Affiliated with

Also associated with

No associations

Rating

The Distribution of Dark Matter in the A:2256 Cluster 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 The Distribution of Dark Matter in the A:2256 Cluster, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Distribution of Dark Matter in the A:2256 Cluster will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1368203