CCAPP Seminar: "The Vast, Expanding Emptiness of the Cosmic Web" Vasiliy Demchenko (Edinburgh)

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May 22, 2018
11:30AM - 12:30PM
Location
PRB 4138

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Add to Calendar 2018-05-22 11:30:00 2018-05-22 12:30:00 CCAPP Seminar: "The Vast, Expanding Emptiness of the Cosmic Web" Vasiliy Demchenko (Edinburgh) Dark energy leaves imprints on the density profile of cosmic voids and we can accurately model their evolution.  Voids and troughs represent the underdense regions of the universe and constitute the majority of its volume. With larger galaxy surveys becoming readily available, these underdensities emerge as a useful and complementary tool to probe cosmology.  Utilizing weak lensing techniques can reveal the matter content of voids/troughs thus shedding light on the nature of dark energy and modified gravity.  I will discuss how extracting the information from voids and troughs can lead us to a better understanding of the underlying cosmology of the universe.  I will show a predicted lensing signal for voids in LSST and HSC using the SLICS simulations as well as the lensing signal for troughs in the GAMA and KiDS surveys. PRB 4138 Center for Cosmology and AstroParticle Physics (CCAPP) ccapp@osu.edu America/New_York public
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Dark energy leaves imprints on the density profile of cosmic voids and we can accurately model their evolution.  Voids and troughs represent the underdense regions of the universe and constitute the majority of its volume. With larger galaxy surveys becoming readily available, these underdensities emerge as a useful and complementary tool to probe cosmology.  Utilizing weak lensing techniques can reveal the matter content of voids/troughs thus shedding light on the nature of dark energy and modified gravity.  I will discuss how extracting the information from voids and troughs can lead us to a better understanding of the underlying cosmology of the universe.  I will show a predicted lensing signal for voids in LSST and HSC using the SLICS simulations as well as the lensing signal for troughs in the GAMA and KiDS surveys.

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