10.08.2015 Views

Structure Formation and Cosmology with high-z Clusters

Lecture4 - USP

Lecture4 - USP

SHOW MORE
SHOW LESS
  • No tags were found...

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

What makes a cluster an efficient gravitational telescope(besides geometrical considerations, DL,DS,DLS) ?• Lensing efficiency (e.g. measured from the number of multiple images)depends from factors which lead to increase the critical area:– ellipticity– degree of merging– degree of substructure– cluster concentration (the <strong>high</strong>er c, the <strong>high</strong>er the lensing efficiency

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!