Scientific Colloquium
March 27, 2019, 3:30 p.m.
Building 3, Goett Auditorium
JOHN D.
RICHARDSON
MASACHUSETTS INSTITUTE OF
TECHNOLOGY
"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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