![]() ![]() The mass limit of the full sample is around 8e14 Msun, with a number distribution that peaks around a redshift of 0.4. We provide optical positions, images, redshifts and X-ray fluxes and luminosities for the full sample, and X-ray temperatures of an important subset. The selection of this sample is approximately mass limited and essentially independent of redshift. Of these 23 clusters, 10 are newly discovered. These maps, coupled with multi-band imaging on 4-meter-class optical telescopes, have yielded a sample of 23 galaxy clusters with redshifts between 0.118 and 1.066. We present optical and X-ray properties for the first confirmed galaxy cluster sample selected by the Sunyaev-Zel'dovich Effect from 148 GHz maps over 455 square degrees of sky made with the Atacama Cosmology Telescope. Nevertheless, a revised analysis once arc redshifts become available, and similar analyses of larger samples, are needed in order to establish more precisely the level of discrepancy with $\Lambda$CDM predictions. We compare our results with theoretical predictions of the standard $\Lambda$CDM model which we show systematically fall short of our measured Einstein radii by a factor of $\simeq1.4$, after accounting for the effect of lensing projection. The distribution of Einstein radii has a median value of $\simeq28\arcsec$ (for a source redshift of $z_\sim8$, providing primary targets for accessing the first stars and galaxies. ![]() Our modelling technique has uncovered some of the largest known critical curves outlined by many accurately-predicted sets of multiple images. We present the results of a strong-lensing analysis of a complete sample of 12 very luminous X-ray clusters at $z>0.5$ using HST/ACS images.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |