Скачать или смотреть The Heliospheric Magnetic Field & the Interstellar Medium | The von Kármán Lecture Series: 2008

NASA Project Scientist for the Ulysses Mission The solar corona accelerates into space to form the supersonic solar wind and push the interstellar medium out of the solar system to distances beyond 100 AU creating the Heliosphere. It also carries the Sun's dipole magnetic field into the Heliosphere filling it with magnetized plasma. The Heliospheric Magnetic Field (HMF) prevents the interstellar plasma and magnetic field from penetrating into the Heliosphere leading to a sharp boundary separating solar and interstellar plasmas. The magnetic dipole is tilted to the Sun's rotation axis and, as the Sun rotates, fast and slow winds interact introducing internal structure and dynamics. Helisopheric dynamics are further enhanced by the penetration of some interstellar constituents into the Heliosphere, namely, neutral gas, electrically- charged interstellar dust and Galactic Cosmic Rays. The structure and dynamics of the heliosphere are profoundly affected by the changes in the solar magnetic field that cause the solar cycle. These physical phenomena will be reviewed based on 17 years of 3D observations by Ulysses, the first spacecraft in a polar orbit that passes above the Sun's polar caps.

Speaker:
Dr. Edward J. Smith
NASA Project Scientist, Ulysses Mission

Credits: NASA/JPL-Caltech

Source: https://www.jpl.nasa.gov/events/lectu...

The von Kármán Lecture Series

General Information

The Theodore von Kármán Lecture Series, named after JPL's founder, and presented by JPL's Office of Communication and Education, brings the excitement of the space program's missions, instruments and other technologies to both JPL employees and the local community. Lectures take place twice per month, on consecutive Thursdays and Fridays. The Thursday lectures take place in JPL's Theodore von Kármán Auditorium and are streamed live via Ustream, and Friday lectures take place at Pasadena City College's Vosloh Forum. Both start at 7:00 PM. Admission and parking are free for all lectures, no reservations are required, and seating is limited.

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