Accession Number:

ADA102785

Title:

The Control of Saturn's Kilometric Radio Emission by Dione.

Descriptive Note:

Progress rept.,

Corporate Author:

IOWA UNIV IOWA CITY DEPT OF PHYSICS AND ASTRONOMY

Personal Author(s):

Report Date:

1981-05-21

Pagination or Media Count:

28.0

Abstract:

Observations of Saturns kilometric radio emissions obtained by the voyager 1 plasma wave receiver during the encounter of the Saturnian system in late 1980 reveal a strong but apparently transitory control by the orbital phase angle of Dione. At 56 kHz the effect of the Dione control is particularly evident during a two-week period centered roughly on closet approach. The intensity of the Saturnian emission is suppressed sharply when Dione is in the local dust sector. We propose that the transitory nature of the Dione control is actually a geometric effect and that a time-variable plasma torus associated with Dione can explain most of the observed details of the Dione modulation by creating a shadow zone near the equatorial plane. Author

Subject Categories:

  • Astrophysics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE