Bulletin of the American Physical Society
APS April Meeting 2020
Volume 65, Number 2
Saturday–Tuesday, April 18–21, 2020; Washington D.C.
Session T03: DAP Award Session: Bethe, Lillienfeld, and Maria Goeppart-Meyer PrizesCancelled Invited Prize/Award Undergrad Friendly
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Sponsoring Units: DAP Chair: Glennys Farrar, New York University Room: Washington 2 |
Monday, April 20, 2020 3:30PM - 4:06PM Not Participating |
T03.00001: Ultraluminous X-ray Sources: Extremes of Accretion and the Search for Intermediate Mass Black Holes Invited Speaker: Fiona Harrison Ultraluminous X-ray sources (ULXs) are bright point sources found in nearby galaxies that are offset from the nucleus, and are therefore not associated with a central supermassive black hole. Because the apparent luminosity exceeds the Eddington limit for a 10 Solar mass black hole by factors of up to one thousand, ULXs were long believed to harbor intermediate mass black holes. Recently, it has been demonstrated that some ULXs in fact contain neutron stars, challenging our understanding of accretion onto magnetized compact objects. I will review the current observational status, and speculate on the nature of the compact objects in the population as a whole. [Preview Abstract] |
Monday, April 20, 2020 4:06PM - 4:42PM Not Participating |
T03.00002: Maria Goeppart-Mayer Award Presentation: Cosmology with Large Galaxy Surveys Invited Speaker: Elisabeth Krause |
Monday, April 20, 2020 4:42PM - 5:18PM Not Participating |
T03.00003: Why Galaxies Start Pickle-Shaped An Historical Introduction to Dark Matter and Galaxy Formation Invited Speaker: Joel Primack Newton’s laws explained why planetary orbits are elliptical, but not why the planetary orbits in the solar system are nearly circular, in the same plane, and in the same direction as the sun rotates. Laplace explained this as a consequence of angular momentum conservation as the sun and planets formed in a cooling and contracting protoplanetary gas cloud. For similar reasons, many astronomers once thought that galaxies would start as disks. But Hubble Space Telescope images of forming galaxies instead show that most of them are prolate – that is, pickle-shaped. This turns out to be a consequence of most galaxies forming in prolate dark matter halos oriented along massive dark matter filaments. This talk will include background on the 2020 Lilienfeld Prize of the American Physical Society to Joel Primack “for seminal contributions to our understanding of the formation of structure in the universe, and for communicating to the public the extraordinary progress in our understanding of cosmology.” [Preview Abstract] |
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