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Abstract
We calculate the strong lensing probability as a function of the image separation Delta theta in TeVeS (tensorvectorscalar) cosmology, which is a relativistic version of MOND (MOdified Newtonian Dynamics). The lens, often an elliptical galaxy, is modeled by the Hernquist profile. We assume a flat cosmology with Omega(b) = 1  Omega(Lambda) = 0.04 and the simplest interpolating function mu(x) = min(1,x). For comparison, we recalculated the probabilities for lenses by singular isothermal sphere (SIS) galaxy halos in LCDM with a Schechter fit velocity function. The amplification bias is calculated based on the magnification of the second bright image rather than on the total of the two brighter images. Our calculations show that the Hernquist model predicts insufficient but acceptable probabilities in flat TeVeS cosmology compared with the results of the welldefined combined sample of the Cosmic Lens AllSky Survey ( CLASS) and the Jodrell Bank/Very Large Array Astrometric Survey (JVAS); at the same time, it predicts higher probabilities than the SIS model in LCDM at small image separations.
Original language  English 

Pages (fromto)  L9L12 
Number of pages  4 
Journal  Astrophysical Journal Letters 
Volume  650 
Issue number  1 
DOIs  
Publication status  Published  10 Oct 2006 
Keywords
 cosmology : theory
 dark matter
 galaxies : luminosity function, mass function gravitational lensing
 methods : numerical
 MODIFIED NEWTONIAN DYNAMICS
 DARKMATTER HALOS
 ALLSKY SURVEY
 TIMEDELAY STATISTICS
 ELLIPTIC GALAXIES
 GRAVITATIONAL LENSES
 DENSITY PROFILES
 ENERGY
 POPULATIONS
 SELECTION
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 1 Finished

Astrophysics at St Andrews: Astrophysics at St.Andrews
Cameron, A. C. (PI) & Horne, K. D. (CoI)
1/04/06 → 31/03/11
Project: Standard