Scientific Colloquium
March 27, 2019, 3:30 p.m.
Building 3, Goett Auditorium

"Voyager Observations of the Outer Heliosphere and Interstellar Medium" 


Voyager 1 and 2 are both in the local interstellar medium (LISM). This paper will describe recent data from both spacecraft with emphasis on the recent Voyager 2 crossing of the heliopause. Both spacecraft saw increases in the galactic cosmic ray (GCR) intensities several months before the heliopause. Voyager 2 is making the first plasma measurements in this region and observed and increase in density and decrease in speed which seems associated with the GCR increase. We give the best estimates for the plasma parameters in the LISM. We will also discuss similarities and differences between the V1 and V2 heliopause crossings.
 
About the Speaker:

John D. Richardson is a Principal Research Scientist at the Kavli Center for Astrophysics and Space Science at the Massachusetts Institute of Technology. He has worked with Voyager data since 1979 and is now the P.I. of the Voyager plasma experiments.  
                   
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