When
3:30 p.m., Feb. 21, 2012
Where
Kuiper Space Sciences 308
Dr. Edward C. Stone
David Morrisroe Professor of Physics
California Institute of Technology
"The Voyager Journey to Interstellar Space"
Abstract:
Launched in 1977 on a journey to the giant outer planets and beyond, Voyager 1 and 2 are now at 119 and 97 AU, exploring the spatial and dynamical properties of the heliosheath as the subsonic solar wind approaches the boundary of the heliosphere. Voyager 1 is in a stagnation region in the northern heliosheath, with a slow wind speed, enhanced magnetic field, and continuing changes in the intensities of particles accelerated in the outer heliosphere and of cosmic ray electrons and nuclei that are diffusing in from nearby regions of the Galaxy. In contrast, at Voyager 2 in the southern heliosheath the flow is faster and slowly turning tailward. These and other observations will be discussed in the context of models of the interaction of the solar and interstellar winds that are evolving as the Voyager journey to interstellar space continues.
Dr. Stone's host is Dr. Randy Jokipii
David Morrisroe Professor of Physics
California Institute of Technology
"The Voyager Journey to Interstellar Space"
Abstract:
Launched in 1977 on a journey to the giant outer planets and beyond, Voyager 1 and 2 are now at 119 and 97 AU, exploring the spatial and dynamical properties of the heliosheath as the subsonic solar wind approaches the boundary of the heliosphere. Voyager 1 is in a stagnation region in the northern heliosheath, with a slow wind speed, enhanced magnetic field, and continuing changes in the intensities of particles accelerated in the outer heliosphere and of cosmic ray electrons and nuclei that are diffusing in from nearby regions of the Galaxy. In contrast, at Voyager 2 in the southern heliosheath the flow is faster and slowly turning tailward. These and other observations will be discussed in the context of models of the interaction of the solar and interstellar winds that are evolving as the Voyager journey to interstellar space continues.
Dr. Stone's host is Dr. Randy Jokipii
General
LPL Colloquium
Undergraduate
Graduate