Bulletin of the American Physical Society
APS April Meeting 2020
Volume 65, Number 2
Saturday–Tuesday, April 18–21, 2020; Washington D.C.
Session A01: Kavli Foundation Keynote Plenary Session: Exploring the CosmosInvited Live Plenary Undergrad Friendly
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Sponsoring Units: APS Chair: Tao Han, University of Pittsburgh Room: Marriott Ballroom 2/3 |
Saturday, April 18, 2020 8:30AM - 9:06AM Live |
A01.00001: Exploring the Universe Invited Speaker: James Peebles The ΛCDM cosmology passes a network of tests that is tight enough for a compelling case that this theory is a good approximation to what happened as the universe expanded and cooled. But the ΛCDM theory is incomplete: we have only weak constraints on the nature of the dark matter, the quantum vacuum energy density remains a deep puzzle, and we have ideas but little evidence of what was happening before the universe was expanding. Perhaps anomalies will offer hints to a better theory. That is why the issue of the extragalactic distance scale is greeted with such interest, and why the comparison of the theory and observations of galaxies is of continuing importance. There still are many directions of research to explore about the large-scale nature of the universe. [Preview Abstract] |
Saturday, April 18, 2020 9:06AM - 9:42AM Live |
A01.00002: Exoplanets: Twenty-five years of discoveries Invited Speaker: Michel Mayor Today after the discovery of more than 4000 planetary systems, it is time to have a look back on the last 25 years. What is the future of high-resolution spectroscopy in the coming decade? With the request of follow-up measurements of Kepler, K2, TESS, CHEOPS, GAIA, PLATO \textellipsis the need for high resolution and/or Doppler spectroscopy will not be diminishing! [Preview Abstract] |
Saturday, April 18, 2020 9:42AM - 10:18AM Live |
A01.00003: The Three-Legged Stool Invited Speaker: Eric Cornell Astrophysical observations provide overwhelming evidence that the current structure of the universe is not due to ordinary gravity acting on ordinary baryons. How can we learn more about the component particles of the physical world, and about the structure and origin of the cosmos? Think of a three-legged stool. For more than a century, physicists have made progress along these lines by colliding particles at ever-higher energies, and drawing inferences from the scattering processes. The second leg of the stool is even older: we’ve learned much about the cosmos through ever-improved telescopes (now no longer limited to detecting photons!) and we’ve come to understand that looking further out means looking further back. These approaches still hold much promise, but I believe that in years to come, the third leg of the stool, precision measurement, will be increasingly important. I will give a very incomplete survey of activity in this area, and discuss some activities along this line ongoing at JILA. [Preview Abstract] |
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