October Speaker: Coronal mass ejection evolution and their effects on galactic cosmic rays and planetary magnetospheres.

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Dr. Reka Winslow
Wednesday October 10th, 2018 at 7:30 PM

Room A104 Bob Wright Centre UVic


Coronal mass ejections (CMEs) are large eruptions of plasma and magnetic field into interplanetary space originating in the Sun’s atmosphere. CMEs interact with the environment that they propagate through; for example, they are the most common cause of planetary space weather, and they also modulate the flux of galactic cosmic rays. Because CMEs can be associated with strong southward magnetic fields of long duration, high velocities, enhanced dynamic pressures, and solar energetic particles, they are strong drivers of geomagnetic storm activity at Earth. The effects of CMEs on Earth’s magnetosphere have been studied for many decades; on the other hand, studies of CME effects on other planets are only now becoming possible with a number of spacecraft in orbit around inner solar system planets. This new data enables us, for the first time, to directly observe how CMEs cause space weather on other planets, and also how CMEs change during propagation from the Sun to Earth. In this talk, I will present efforts to investigate how CMEs evolve as they propagate outward from the Sun, in order to better predict their effects on planetary magnetospheres. I will also showcase how CMEs affect Mercury’s magnetosphere as well as the flux of galactic cosmic rays in the inner solar system.

Dr. Reka Winslow is a research scientist in the Space Science Center at University of New Hampshire, where she also conducted her postdoctoral work. She holds a Ph.D. in geophysics, having specialized in space physics and planetary science at UBC. She has over 10 years of experience conducting research in space physics. Her work bridges the fields of heliophysics and planetary science, by focusing on observational studies of coronal mass ejections, interplanetary shocks, galactic cosmic rays, and solar energetic particle events to better understand their evolution in the inner heliosphere and their interaction with different planetary magnetospheres in the solar system. She is a member of the science team for the CRaTER instrument onboard the Lunar Reconnaissance Orbiter, and was a member of the MESSENGER science team while the spacecraft was orbiting Mercury.

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