Hydromagnetic waves near O(+) (OR H2O/+/) ion cyclotron frequency observed by Sakigake at the closest approach to Comet Halley

Details Hydromagnetic waves near O(+) (OR H2O/+/) ion cyclotron frequency observed by Sakigake at the closest approach to Comet Halley Hydromagnetic waves near O(+) (OR H2O/+/) ion cyclotron frequency observed by Sakigake at the closest approach to Comet Halley

Aug 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986georl..13..825y&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 13, Aug. 1986, p. 825-828.

Physics

33

Halley'S Comet, Magnetohydrodynamic Waves, Positive Ions, Space Plasmas, Ion Cyclotron Radiation, Japanese Spacecraft, Oxygen Ions, Plasma-Particle Interactions, Transverse Waves, Water

Scientific paper

Long-period HM waves with 150-380 s periods were observed by Sakigake at 7 x 10 to the 6th km upstream from Comet Halley. The wave amplitudes were as great as approximately 2 nT peak to peak. The long-period waves were of an approximately linearly polarized transverse mode and propagated parallel to the ambient magnetic field. Dominant periods of the waves were found to be consistent with the local O(+) (or H2O/+/) cyclotron period and to change as a function of the ambient magnetic field. The long-period HM waves are believed to be excited by a resonant instability with high-energy cometary heavy ions. The necessary cometary ion density for excitation at a distance of 7 x 10 to the 6th km from the comet can be inferred to be of the order of .001-.0001/cu cm for .1-.01 keV O(+) (or H2O/+/) ions.

Affiliated with

Also associated with

No associations

Rating

Hydromagnetic waves near O(+) (OR H2O/+/) ion cyclotron frequency observed by Sakigake at the closest approach to Comet Halley does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Hydromagnetic waves near O(+) (OR H2O/+/) ion cyclotron frequency observed by Sakigake at the closest approach to Comet Halley, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydromagnetic waves near O(+) (OR H2O/+/) ion cyclotron frequency observed by Sakigake at the closest approach to Comet Halley will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-892896