Dispersion Speed in the Gravitational Lens Model B1938 +666

Abstract

The galaxy gravitational lens system B1938+666 has a relatively low density environment with an image that is a ring withan angular deviation of the optical axis of 0.93 arcseg according to studies conducte dand published in an article published by Kyu-Hyun (2005), where a singular and isothermal-elliptical gravitational lens modelis assumed. In our case,we want to estimate the possible values in the dispersions peed of the component sof the lens using a isothermals phere type lens model with core and considering a universe in which most accepted values for the Hubble constant and the cosmological constant, in the standard cosmology, are used.