University of Minnesota
School of Physics & Astronomy

MN Institute for Astrophysics Colloquium

Friday, October 26th 2018
Speaker: Bin Chen,Center for Solar Terrestrial Research, New Jersey Institute of Technology
Subject: Solar Flare Observations with the Karl G. Jansky Very Large Array

Known as one of the most capable radio telescopes for studying various astronomical objects in the universe, the Karl G. Jansky Very Large Array (JVLA) is also commissioned to observe the Sun in a wide range of radio wavelengths from <1 GHz to 18 GHz. Thanks to the Sun’s proximity, the JVLA can be configured as a powerful data machine when observing the Sun, capable of generating over one billion (1,000,000,000) radio images per hour of observing at an ultra-high time cadence (10 milliseconds), spectral resolution (~1%), and spatial resolution (~21”/f GHz). JVLA’s powerful dynamic spectroscopic imaging capability, combined with its high sensitivity, offer unique means for studying various radio emission from the Sun, particularly radio bursts emitted by energetic electrons accelerated in solar flares. We have recorded dozens of flare events with various sizes since 2011. The study of a subset of these flare events has yielded new insights on the magnetic energy release, particle acceleration and transport processes, which are not only important in solar flare physics, but also relevant in space physics and astrophysics contexts that involve magnetized plasma. I will discuss recent results based on these JVLA flare observations.

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