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    <title><string language="fre"><![CDATA[TWEAKING GENERAL RELATIVITY: MOND RELATIVISTIC GRAVITY THEORY AS A SUBSTITUTE FOR DARK MATTER]]></string></title>
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        <string language="fre"><![CDATA[The success of the standard concordance 
cosmological model in predicting the primordial abundances of the light 
elements, and modeling the power spectrum of fluctuations of the cosmic 
microwave background have suggested to many that its ingredients are all
 one needs to understand galaxies and galaxy systems. However, a number 
of known problems with this expectation may signal the failure of 
standard gravity theory already on galaxy scales. An alternative 
nonrelativistic gravity theory - AQUAL, suggested by the 
phenomenological MOND paradigm, does rather well for galaxy scale 
systems, but performs poorly on cluster scales.


I will discuss an improved AQUAL with potential for naturally 
handling clusters without addition of neutrinos or other nonbaryonic 
matter. Promoting AQUAL to a relativistic theory is not straightforward 
because of the constraints imposed by gravitational lensing. The 
obstacles were removed by TeVeS, historically the first covariant 
modified gravity theory consistent with MOND. After reviewing TeVeS's 
structure I will discuss its confrontation with gravitational lensing 
data. Time permitting I will overview work on the growth of cosmological
 fluctuations within TeVeS, and proposals to test this aspect of the 
theory with large galaxy and lensing surveys.]]></string></description>
    <keyword><string language="fre"><![CDATA[General Relativity]]></string></keyword><keyword><string language="fre"><![CDATA[MOND Theory]]></string></keyword><keyword><string language="fre"><![CDATA[Dark Matter]]></string></keyword>
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            <entity><![CDATA[BEGIN:VCARD
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FN:Jacob D. BEKENSTEIN
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NOTE:Jacob David Bekenstein (Hebrew: יעקב בקנשטיין; May 1, 1947 – August 16, 2015) was a Mexico-born Israeli-American theoretical physicist who made fundamental contributions to the foundation of black hole thermodynamics and to other aspects of the connections between information and gravitation.     Source: Wikipedia (https://en.wikipedia.org/wiki/Jacob_Bekenstein) 
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            <date><dateTime>2011-06-17</dateTime></date>
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FN:Jean MOUETTE
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URL;TYPE=work:http://www.iap.fr/
ROLE:content provider
NOTE:Responsable communication à l'Institut d'Astrophysique de Paris  
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            <date><dateTime>2011-06-17</dateTime></date>
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