High resolution spectrograms of ion-acoustic waves in the solar wind. Progress report

Technical Report · Wed Mar 01 04:00:00 EST 1978

OSTI ID:6587602

Kurth, W S; Gurnett, D A; Scarf, F L

Ion-acoustic waves, similar to those detected by the helios spacecraft from 0.3 to 1.0 AU, have now been detected by the Voyager spacecraft in the solar wind out to heliocentric radial distances of 1.7 AU. High bit rate waveform measurements provide the first high resolution, frequency-time spectrograms of these waves. The Voyager spectrograms show that the ion-acoustic waves consist of narrow-band bursts which last for a few seconds or less. The center frequency of the bursts can fluctuate rapidly in frequency, usually in the range between the electron and ion plasma frequency f sub p(-) and f sub p(+). (These waves have been previously referred to as f sub p(+) < f < f sub p(-) noise.)

• Research Organization: Iowa Univ., Iowa City (USA). Dept. of Physics and Astronomy
• OSTI ID: 6587602
• Report Number(s): AD-A-054912; U.ofIowa-78-15
• Country of Publication: United States
• Language: English

Related Subjects

640104* -- Astrophysics &amp; Cosmology-- Solar Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ION ACOUSTIC WAVES
ION DENSITY
ION WAVES
PLASMA WAVES
SOLAR ACTIVITY
SOLAR WIND