Bulletin of the American Physical Society
APS April Meeting 2020
Volume 65, Number 2
Saturday–Tuesday, April 18–21, 2020; Washington D.C.
Session C03: Cecilia Payne-Gaposchkin Thesis PrizeInvited Live Prize/Award
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Sponsoring Units: DAP Chair: Taboada Ignacio, Georgia Institute of Technology Room: Washington 2 |
Saturday, April 18, 2020 1:30PM - 2:06PM Live |
C03.00001: Searching for Dark Matter in Distant Galaxies Invited Speaker: Nicholas Rodd Galaxies beyond our own represent some of the brightest potential sources of dark matter flux on the sky. As such they represent excellent candidates for indirect detection, which was the focus of my thesis, and in this talk I will demonstrate how to exploit this information to search for dark matter using the Fermi telescope. In particular I will outline how to map from an observed baryonic galaxy to its underlying dark matter distribution and a demonstration that our methods work in a simulated N-body environment. [Preview Abstract] |
Saturday, April 18, 2020 2:06PM - 2:42PM Live |
C03.00002: Uncovering The Physics of Active Galactic Nuclei Feedback With High Resolution X-Ray Spectroscopy Invited Speaker: Anna Ogorzalek Active galactic nuclei (AGN) significantly impact the evolution of their host galaxies, as they can prevent star formation by either expelling large fractions of gas with wide-angle outflows, or heating up the halo gas with jets. However, how the AGN energy is transferred to the galaxy remains unknown. The X-ray band is key to answering this question, as the gas immediately impacted by the black hole reaches high, X-ray emitting temperatures. In this talk, I will present my doctoral research on new applications of modern statistical techniques to high resolution X-ray spectra of nearby AGN in Seyferts, elliptical galaxies, and galaxy clusters. Here, using Bayesian approaches allows us to place competitive constraints on gas kinematics and thermodynamics, and gain new insights into the physical processes behind AGN feedback. [Preview Abstract] |
Saturday, April 18, 2020 2:42PM - 3:18PM Live |
C03.00003: Understanding the Large-Angle CMB and Blinding DES Combined-Probe Analyses: Towards Precision Cosmology on the Largest Observable Scales Invited Speaker: Jessica Muir With the advent of increasingly large cosmological datasets (and correspondingly small statistical uncertainties), our ability to extract information about fundamental physics from observations will be limited by our ability to understand and account for systematic errors. The three projects which comprised my dissertation research are united by the goal of characterizing and mitigating potential sources of bias in cosmological analyses. The first two projects focus on features of the large-angle Cosmic Microwave Background (CMB) which have been identified as statistically unlikely in our standard cosmological model, and which could provide clues about the physics of inflation. I will describe how galaxy survey systematics limit our ability to separate primordial and late-time contributions to those large-angle features, and will characterize the extent to which several commonly studied anomalous large-angle features are (or are not) actually independent of one another. In the final part of my talk I will introduce a new and robust method for blinding the analysis of multiple cosmological probes, and will describe how it is being used to protect the results of the ongoing Dark Energy Survey Year 3 combined weak lensing and galaxy clustering analysis from experimenter bias. [Preview Abstract] |
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