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Astronomy Colloquium - "Early Large Scale Structure Science from the Dark Energy Survey"

Event Type
Department of Astronomy
Astronomy 134
Mar 17, 2015   3:45 pm  
Ignacio Sevilla (CIEMAT, UIUC visiting scholar)   
Rebecca Bare
Originating Calendar
Astronomy Colloquium Speaker Calendar

The Dark Energy Survey (DES) is a 5000 square degree photometric survey with the goal of measuring the parameters of dark energy. In August 2013, it began survey operations using the DECam imager. Making measurements of Large Scale Structure using galaxy clustering is one of the primary science drivers of the experiment. When combined with other Dark Energy probes made with the same data, these measurements will enable either a strong validation of the current LCDM paradigm, or will show inconsistencies pointing towards a cosmology based on modified gravity or an evolving Dark Energy equation of state. Some of the more interesting results from this project will come not only from measuring the BAO scale, but also from obtaining the cross-correlation with the CMB signal, measuring the galaxy bias with high statistical precision and at multiple redshifts, and combining weak lensing and clustering measurements using the same dataset. I will describe the ongoing efforts at making measurements using the initial Science Verification dataset (approximately 150 square degrees) with special focus on understanding the systematics that will be important for later releases.

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