The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The average observed image separation of multiply-imaged QSOs decreases sharply with source redshift. Such a relation cannot be reproduced in any plausible cosmological model if the lens-galaxy mass distribution is assumed to be a power law, and/or the scaling laws of the lens-galaxy population are those of ellipticals. It is shown here that the observed relation, which is due to the lack of wide...