Universe


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    • Author:  by R. Brenttullyandedwardjshaya  

    • Abstract:  theconclusionthatthe remustbeasubstantial dierentialbetweenthe mass-to-lightratioso fmostgalaxiesandthos einasmallnumberofspe cialplaces. Specically,M=L=1000M =Lisindicatedforthef ullVirgoClusterwhile M=L=150M=Lisappropri ateformostenvironmen ts.Itisarguedthat ahigherM=Lvalueischa racteristicofE/S0kno ts,regionswherethega laxy densityishighandcoll apsetimescalesaresho rt.Regionslargerthan galaxies wherecollapseisocurr ingonlyontheorderoft heageoftheuniverse,t he environmentwherespir alsandirregularspred ominate,arecharacter izedby alowM=L.Overall,them eandensityoftheunive rseiswellbelowclosur e.

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