Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-08-27
Astronomy and Astrophysics
Astrophysics
32 pages, 9 figures. Accepted for publication in The Astrophysical Journal
Scientific paper
10.1086/522879
We present the results of two (101 ks total) Chandra observations of the z=0.778 optically selected lensing cluster RCS022434-0002.5, along with weak lensing and dynamical analyses of this object. An X-ray spectrum extracted within R(2500) (362 h(70)^(-1) kpc) results in an integrated cluster temperature of 5.1 (+0.9,-0.5) keV. The surface brightness profile of RCS022434-0002.5 indicates the presence of a slight excess of emission in the core. A hardness ratio image of this object reveals that this central emission is primarily produced by soft X-rays. Further investigation yields a cluster cooling time of 3.3 times 10^9 years, which is less than half of the age of the universe at this redshift given the current LCDM cosmology. A weak lensing analysis is performed using HST images, and our weak lensing mass estimate is found to be in good agreement with the X-ray determined mass of the cluster. Spectroscopic analysis reveals that RCS022434-0002.5 has a velocity dispersion of 900 +/- 180 km/s, consistent with its X-ray temperature. The core gas mass fraction of RCS022434-0002.5 is, however, found to be three times lower than expected universal values. The radial distribution of X-ray point sources within R(200) of this cluster peaks at ~0.7 R(200), possibly indicating that the cluster potential is influencing AGN activity at that radius. Correlations between X-ray and radio (VLA) point source positions are also examined.
Bautz Marshall
Ellingson Erica E.
Gilbank David
Gladders Mike
Hicks Amalia K.
No associations
LandOfFree
A Multiwavelength Analysis of the Strong Lensing Cluster RCS 022434-0002.5 at z=0.778 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 A Multiwavelength Analysis of the Strong Lensing Cluster RCS 022434-0002.5 at z=0.778, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Multiwavelength Analysis of the Strong Lensing Cluster RCS 022434-0002.5 at z=0.778 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-362425