Forecasting Cosmic Doomsday from CMB/LSS Cross-Correlations

Jaume Garriga; Levon Pogosian; Tanmay Vachaspati

Forecasting Cosmic Doomsday from CMB/LSS Cross-Correlations

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arxiv astro-ph/0311412 v1 pith:4U6DVYDN submitted 2003-11-17 astro-ph hep-phhep-th

Jaume Garriga , Levon Pogosian , Tanmay Vachaspati This is my paper

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keywords cosmiccosmologicalcross-correlationsdoomsdayenergynegativepotentialvariation

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A broad class of dark energy models, which have been proposed in attempts at solving the cosmological constant problems, predict a late time variation of the equation of state with redshift. The variation occurs as a scalar field picks up speed on its way to negative values of the potential. The negative potential energy eventually turns the expansion into contraction and the local universe undergoes a big crunch. In this paper we show that cross-correlations of the CMB anisotropy and matter distribution, in combination with other cosmological data, can be used to forecast the imminence of such cosmic doomsday.

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