Bulletin of the American Physical Society
2017 Annual Meeting of the APS Mid-Atlantic Section
Volume 62, Number 19
Friday–Sunday, November 3–5, 2017; Newark, New Jersey
Session E5: Astro I: Gravitational Physics |
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Chair: Rosalba Perna, Stony Brook University Room: Atrium, Campus Center, NJIT |
Saturday, November 4, 2017 10:00AM - 10:36AM |
E5.00001: Dawn of gravitational-wave astronomy: recent results from LIGO and Virgo Invited Speaker: Bangalore Sathyaprakash LIGO concluded its second observing run on 25 August 2017. During August 1-25 the two LIGO detectors and the Virgo detector in Italy took data in coincidence. In this talk I will summarise results from the second observing run. LIGO's observations of binary black holes have begun to impact astrophysical models of the formation and evolution of compact binaries and facilitated tests of general relativity in a regime where the theory had not been tested before. In addition to binary black holes we also expect to observe binaries in which one, or both, of the companions is a neutron star and the other is possibly a black hole. Observing the full spectrum of binaries will help us understand the origin of short gamma-ray bursts, measure the equation-of-state of dense nuclear matter, test the no-hair theorem for black holes and map the cosmic history of the formation and growth of light black hole seeds. Gravitational wave observations could also reveal processes that operate in core collapse supernovae and the mechanism of core bounce and formation of neutron stars and black holes. [Preview Abstract] |
Saturday, November 4, 2017 10:36AM - 10:48AM |
E5.00002: Analyzing 3D Mass Models for Galaxy Cluster Lensing Catie Raney, Charles Keeton, Sean Brennan Galaxy clusters are the most massive gravitationally bound objects in our universe. Their large physical size coupled with this enormous mass makes them excellent tools for finding very faint, distant galaxies due to their ability to magnify background sources through gravitational lensing. The Hubble Frontier Fields are a new and incredibly deep data set for six such clusters. These fields have revealed a number of lensed high-redshift galaxies, some of which are seen just 500 million years after the Big Bang, giving us information on galactic formation and evolution. In order to study these galaxies, several teams have quantified the distortion and magnification from gravitational lensing by modeling the dark matter and galaxies within the cluster. However, there are galaxies in front of and behind the clusters that likely affect the light bending. We have identified important line-of-sight galaxies and extended the modeling methodology to include them, building the first fully 3D mass models for all of the Hubble Frontier Fields. We present our new models and compare them with standard 2D models to quantify the importance of line-of-sight effects in cluster lensing. [Preview Abstract] |
Saturday, November 4, 2017 10:48AM - 11:24AM |
E5.00003: Wormholes and entangled states Invited Speaker: Juan Maldacena We describe how the Schwarschild-Kruskal wormholes can be interpreted as entangled states. We also explain the connection between quantum teleportation and transmission of information through a wormhole. [Preview Abstract] |
Saturday, November 4, 2017 11:24AM - 12:00PM |
E5.00004: Measuring Gravitational Lensing of the Cosmic Microwave Background to Probe the Mass of the Neutrinos and the Properties of Dark Matter Invited Speaker: Neelima Sehgal In this talk I will discuss the next frontier of research on the Cosmic Microwave Background (CMB): precisely measuring the gravitational lensing of the CMB. This CMB lensing signal encodes a wealth of statistical information about the distribution of matter in the Universe, which is sensitive to the total mass of the neutrinos and the particle properties of dark matter. I will discuss recent progress in probing the sum of the neutrino masses using data from the Atacama Cosmology Telescope Polarimeter (ACTPol), and forecasts of what can be expected from the near future AdvACT, Simons Observatory, and CMB-S4 experiments. I will also discuss a novel and powerful way to probe dark matter particle properties using very high resolution CMB lensing measurements, which can distinguish between cold dark matter and alternative dark matter models that suppress small-scale structure, such as warm or fuzzy dark matter. [Preview Abstract] |
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