Gravitational lensing forsitp

Jul 12, 20130 likes756 views

Dr. Karen Masters is a project scientist for the Galaxy Zoo project at the University of Portsmouth's Institute of Cosmology and Gravitation. She works on classifying galaxies through citizen science. Dr. Masters researches galaxy morphology and evolution as the project scientist for Galaxy Zoo.

Dr. Karen Masters
Institute of Cosmology and Gravitation
University of Portsmouth
Galaxy Zoo Project Scientist

This document discusses gravitational lensing and some of the challenges involved in measuring it. Gravitational lensing causes the apparent deflection of light from distant background sources as it passes massive foreground objects. Precise measurements of lensing effects can provide information about dark matter distributions and the geometry and growth of the universe. However, there are three main problems: accurately measuring galaxy shapes used to detect lensing distortions, determining reliable photometric redshifts for galaxies, and accounting for intrinsic alignments of galaxy orientations unrelated to lensing.

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