Argonne National Laboratory

Upcoming Events

Next-Generation Dark Energy Measurements: Challenges and Opportunities

Physics Colloquium
Christopher Stubbs, Harvard University
April 20, 2018 11:00AM to 12:00PM
Building 203

Abstract: The discovery that the cosmic expansion is accelerating, presumably driven by weirdness in the vacuum we call dark energy, has precipitated a crisis in fundamental physics. A number of ambitious dark energy projects are in the design or construction phase, with an eye toward controlling sources of systematic error.

I will describe one such next-generation project, the Large Synoptic Survey Telescope (LSST), which will combine a large collecting area (8.5-meter-diameter primary mirror), a wide-field imager (3.5 Gpix), and a sophisticated image processing pipeline to provide unprecedented insight into the nature of dark energy.

This talk will explore some of the issues that are often swept under the carpet, including sensor artifacts, precision calibration issues, and the challenges of distinguishing astrophysical phenomena from new physics.