2020
Tuesday Lunch Seminar: Richard Anantua (CfA, Harvard): "Towards Understanding Near-Horizon Physics of Sgr A* from Movies and Polarization Maps"
1:00–2:00 pm Zoom
Recent radio observations of emitting magnetized plasma in the vicinity of Sagittarius A* (Sgr A*) in our Galactic Center are linked to simple electron temperature parametric models based on turbulent heating and conversion of magnetic to particle energy in general relativistic magnetohydrodynamic (GRMHD) simulations and related analytic models. GRMHD-based intensity map movies simulating hourly timescales show that these models aggregate into at least four morphological types: 1.) Thin, asymmetric photon ring; 2.) Coronal boundary layer with thin photon ring; 3.) Thick photon ring; and 4.) Extended outflow. Positrons are added in a semi-analytic, radiatively inefficient accretion flow model for which polarization maps are sensitive to positron effects of decreasing intrinsic circular polarization and increasing Faraday conversion.
KICP Seminar: Cynthia Chiang (McGil Universityl)
12:00–1:00 pm Zoom Room
Cynthia Chiang, McGill University, “Illuminating the Dark Universe with Radio Observations”
A&A Colloquium: Lisa Kewley (Australian National University)
3:30–4:30 pm Zoom - for link please contact lrebeles@oddjob.uchicago.edu
“ASTRO 3D”
The ARC Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) isa $40M Centre of Excellence, which is producing a comprehensive picture of the build up of mass, angular momentum, and the chemical elements from the first stars, to (and including) the Milky Way. Our surveys include the measurement of the power spectrum at the Epoch of Reionization with the Murchison Widefield Array (MWA), large HI surveys with the Square Kilometre Array Pathfinder (ASKAP), the ongoing Australian optical integral field surveys of 10^5 galaxies (SAMI, followed by HECTOR), a large galaxy evolution program combining HST, Keck, and ESO spectroscopy of galaxies from z=6 to z=0.5, and the major Australian Galactic Archaeology program (GALAH) to track the chemical history and accretion history of our Milky Way through GAIA and the HERMES instrument on the Anglo Australian Telescope. I will describe the recent discoveries made in ASTRO 3D, as well as providing an update on our ambitious equity and diversity programs, and our nationwide education and public outreach programs.
KICP seminar: Igor Andreoni (Caltech)
12:00–1:00 pm Zoom Room
Igor Andreoni, Caltech, “Results from triggered and un-triggered searches for counterparts to neutron star mergers”
KICP Colloquium: Lindsey Bleem (Argonne)
3:30–4:30 pm Zoom Room (online)
Lindsey Bleem, Argonne, “Galaxy Cluster Cosmology with the South Pole Telescope”
Tuesday Lunch Seminar: Josh Frieman (UChicago/Fermilab): A "Tail" of Two Cities: Modeling COVID-19 Evolution in New York City and Cook County
12:00–1:00 pm Zoom
Tuesday Lunch Seminar: A “Tail” of Two Cities: Modeling COVID-19 Evolution in New York City and Cook County
Joshua Frieman, Fermilab/UChicago
A&A and KICP Outreach Symposium
2:00–5:00 pm Zoom Room (online)
A&A Colloquium: Mariska Kriek (University of California - Berkeley)
3:30–4:30 pm Zoom - for link, please contact, Laticia Rebeles, lrebeles@oddjob.uchicago.edu
“The Many Phases of Massive Galaxies”
In past years, large and deep photometric and spectroscopic surveys have significantly advanced our understanding of galaxy growth, from the most active time in the universe (z~2) to the present day. In particular, the evolution in stellar mass, star formation rate, and structure of complete galaxy samples have provided independent and complementary insights into their formation histories. In addition, detailed studies of the properties of individual distant galaxies have lead to a better apprehension of the physical processes which govern galaxy growth. Nonetheless, many outstanding questions remain. In this talk I will give an overview of our current picture of galaxy growth over the past 11 billion years, discuss current challenges and outstanding questions, and introduce new and ongoing efforts to further unravel the formation histories of massive galaxies.
Autumn Quarter Begins
All day
KICP Coffee, Cookies and Conversation
3:00–3:30 pm Zoom Room (online)