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https://utoronto.zoom.us/j/88002112316

Meeting ID: 880 0211 2316
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Meeting ID: 880 0211 2316
Find your local number: https://utoronto.zoom.us/u/k3MpKGV4s Location: MP 15th Floor Conference Room

The schedule of speakers: https://tinyurl.com/cosmo-rota  
Location: MP1318A

Location: MP1422

Virtual

Title: CMB Experiments as Wide Field Astrophysics Surveys

Abstract: There is still a lot of fundamental physics to learn from ongoing and future CMB experiments, but they now have sufficient depth that they can reasonably be thought of as mm-wave wide-area sky surveys, providing mm-wave perspectives on similar science themes traditionally done at visible wavelengths. This includes searches for interesting rare objects, like galaxy clusters and strong lenses, mapping the mass distribution with weak lensing, and tracking the time variable sky for solar system objects, stellar flares, and possible extragalactic transients.

Location: 1318A

NOTE: July 25th meeting will be in MP1318A

Topic: Scintillometry Meeting
Time: This is a recurring meeting Meet anytime

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https://utoronto.zoom.us/j/88185994556

Meeting ID: 881 8599 4556
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+16475580588,,88185994556# Canada
+17789072071,,88185994556# Canada

Find your local number: https://utoronto.zoom.us/u/kbvvbvCIx
Location: MP 15th Floor Conference Room

Location: MP1422

https://us02web.zoom.us/j/88314648126?pwd=dmJaekkvWkJoWmxhc0J1blVIYWVnQT09 Location: MP 15th Floor

Location: MP1422

Location: MP1422

Location: Virtual

Join Zoom Meeting
https://utoronto.zoom.us/j/88002112316

Meeting ID: 880 0211 2316
One tap mobile
+16475580588,,88002112316# Canada
+17789072071,,88002112316# Canada

Dial by your location
Meeting ID: 880 0211 2316
Find your local number: https://utoronto.zoom.us/u/k3MpKGV4s Location: MP 15th Floor Conference Room

Open discussion of stars- and planets-related topics or more specialized discussion of dynamics-related papers on alternating weeks. See here for details. Location: MP 1318A

The schedule of speakers: https://tinyurl.com/cosmo-rota  
Location: MP1318A

Location: MP1422

Virtual

Title: Supersonic magnetohydrodynamic turbulence at extreme Reynolds numbers

Abstract: Supersonic magnetohydrodynamic (MHD) turbulence is a ubiquitous state for many astrophysical plasmas, including thin, cool accretion disks and the interstellar medium of our galaxy. However, even the basic statistics of this type of turbulence remains uncertain. In this talk I will present results from supersonic MHD turbulence simulations at unparalleled resolutions, with plasma Reynolds numbers of over a million and grids up to 10080^3. In the kinetic energy spectrum we find a break between the scales that are supersonic and dominated by kinetic energy, with spectral index -2 (Burgers turbulence), and those that become strongly magnetized and subsonic, with spectral index -3/2. At magnetic Reynolds number of greater than 10^5, we find a power law emerging in the magnetic energy spectrum with spectral index -9/5, unexplained by any modern, asymptotic turbulence theory. On the strongly magnetized scales, the plasma tends to self-organize into locally relaxed states, depleting the nonlinearities and highlighting that plasma relaxation is a fundamental feature of supersonic MHD turbulence. We coin the term competitive relaxation to describe the competition between the turbulent nonlinearities and the depletion of these nonlinearities through relaxation. Both of these aspects challenge profoundly the tenets of magnetohydrodynamic turbulence theories and describe a new paradigm for supersonic turbulence.

Host: Claire She Ye

Location: 1318A

NOTE: July 25th meeting will be in MP1318A

Topic: Scintillometry Meeting
Time: This is a recurring meeting Meet anytime

Join Zoom Meeting
https://utoronto.zoom.us/j/88185994556

Meeting ID: 881 8599 4556
One tap mobile
+16475580588,,88185994556# Canada
+17789072071,,88185994556# Canada

Find your local number: https://utoronto.zoom.us/u/kbvvbvCIx
Location: MP 15th Floor Conference Room

Location: MP1422

https://us02web.zoom.us/j/88314648126?pwd=dmJaekkvWkJoWmxhc0J1blVIYWVnQT09 Location: MP 15th Floor

Location: MP1422

Location: MP1422

Location: Virtual

Title: TBD

Abstract: TBD

Location: 1318A