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Location
SHL215
Speaker
Michael Daniel, Center for Astrophysics | Harvard & Smithsonian, Fred Lawrence Whipple Observatory
Host
Holder

Stars visible to the naked eye typically have angular diameters on the order of one milliarcsecond (mas) or less. Therefore directly measuring their size, let alone revealing details across and outside stellar surfaces such as starspots or transiting exoplanets, requires imaging with an angular resolution measured down to tens of microarcseconds. The Rayleigh criterion implies kilometer-scale telescopes to achieve this level of angular resolution in the visible waveband.

Location
SHL215
Speaker
Dr. Francesco Pucci, University of Calabria
Host
Matthaeus
Turbulence and reconnection are two phenomena that go hand in hand in astrophysical plasmas. On the one hand, magnetic reconnection is part of the turbulent cascade dynamics, being triggered at the interface of two different magnetic islands. On the other hand, the magnetic reconnection process ejects plasma jets that trigger turbulence in the reconnection exhausts. This talk will be devoted to this second aspect of the relationship between turbulence and reconnection. Two numerical studies are presented.
Location
SHL215
Speaker
Kyle Augustson, CEA Saclay-Paris
Host
Owocki
Massive stars as with all stars possess convective regions, from the PMS to their explosive demise. These regions likely participate in vigorous dynamo action, leading to the construction of magnetic fields that can be in superequipartition with respect to the convection when in a rapidly rotating regime. Moreover, near surface regions of sufficiently massive stars can be convectively unstable, producing the so-called iron-bump convection zone. This region too will likely be running a dynamo.
Location
SHL215
Speaker
Adebanjo Oriade, University of Delaware
Host
Gizis
The activity presented here is inspired primarily by a division A Science Olympiad event I supervise, "Chopper Challenge". The elementary school student groups are provided with tools, including a sheet of card stock paper and their task is to build three structures: (1) rotating clockwise as viewed from above as it falls, (2) rotating counter-clockwise, and (3) rotating in a vertical plane as it falls. The groups with the largest total time of flight with proper rotations win. Now I am adapting that game for college students.
Location
SHL215
Speaker
Stanley Owocki, University of Delaware
Host
Owocki
Eta Carinae is one of the most massive and most luminous stars in our galaxy. In the 1840’s it had a "Great Eruption” that resulted in the bipolar Homunculus nebula we see today. But recent studies show there have also been prior “sprays” of mass ejected in distinct directions, with kinematic ages indicating several century intervals for eruptions dating back nearly a thousand years.
Location
SHL215
Speaker
Dr. Christopher Russell, Pontificia Universidad Católica de Chile
Host
Owocki
360-degree videos are unique movies that are rendered all around you. No matter where you look - in front, behind, left, right, up, or down - you are watching the movie, though exactly what you see depends on where you look and when. Investments driven by 360-degree cameras have made these videos as easily shareable as regular movies: via the YouTube webpage on a computer, with the YouTube app on a smartphone, or get the most immersive experience in virtual reality (VR) goggles.