Bulletin of the American Physical Society
APS April Meeting 2021
Volume 66, Number 5
Saturday–Tuesday, April 17–20, 2021; Virtual; Time Zone: Central Daylight Time, USA
Session Y06: Dark EnergyInvited Live Undergrad Friendly
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Sponsoring Units: DAP Chair: Josh Frieman, Fermilab |
Tuesday, April 20, 2021 1:30PM - 2:06PM Live |
Y06.00001: Dark Energy Survey: Overview Invited Speaker: Ami Choi The Dark Energy Survey (DES) is a ground-based imaging survey that covers 5000 deg$^2$ of the southern high Galactic latitude sky in five broad photometric bands, $grizY$. The primary mission of DES is to investigate cosmic acceleration and the nature of dark energy. I will introduce the survey and describe the most recent public data release, Data Release 2 (DR2), which comprises reduced images, source catalogs, and associated data products assembled from six years of DES science operations. I will review the previous state-of-the-art multi-probe cosmology from the first round of DES analyses. Finally, I will present an overview of a new ‘wide and deep’ approach to cosmology that we have applied to our most recent analysis of DES data taken through the first three years of observations (Y3). [Preview Abstract] |
Tuesday, April 20, 2021 2:06PM - 2:42PM Live |
Y06.00002: Dark Energy Survey: Year 3 cosmology from large-scale structure Invited Speaker: Alexandra Amon I will present the weak lensing cosmology results from the Dark Energy Survey (DES) using its first three years of data taken using the Dark Energy Camera on the 4m Blanco telescope at CTIO. With the Year 3 weak lensing catalogue containing more than 100 million galaxies in riz photometric bands, this constitutes the most powerful weak lensing dataset to date. I will focus on some of the main challenges that weak lensing analyses are susceptible to, such as redshift estimation and blending, and describe several novel methodological leaps that DES has implemented in this round of analyses to account for these issues and deliver robust cosmology. [Preview Abstract] |
Tuesday, April 20, 2021 2:42PM - 3:18PM Live |
Y06.00003: Dark Energy Survey: Recent cosmology results and outlook Invited Speaker: Michael Troxel I will present the current status of cosmology results from the Dark Energy Survey (DES). DES has surveyed 5000 square degrees of the sky in five photometric bands (grizY), which is contained within the public DES Data Release 2 (DR2). I will summarize the status of cosmology results primarily from the first three years of the survey (DES Y3), which includes results from large-scale structure in the universe, combining galaxy clustering and weak gravitational lensing, and from geometric probes, baryon acoustic oscillation and supernovae type Ia. Finally, I will report on the outlook for future cosmological analyses in DES using the Y3 data set and the complete survey represented by DR2. [Preview Abstract] |
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