Ion-cyclotron wave generation by planetary ion pickup

Russell, C. T.; Blanco‐Cano, X.

doi:10.1016/j.jastp.2007.02.014

Cited by 24 publications

(24 citation statements)

References 30 publications

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“…Ion‐cyclotron waves at the fundamental frequency of O + , H 3 O + , and O 2 + appear during ∼7 h for 24 December and 27 November observations, but details for only 5 h are shown for those dates. In contrast, the observation of 9 March shows ion‐cyclotron waves at the fundamental for a short interval of 3 h with a cutoff of ∼2 h between 09:30 UT and 11:30 UT corresponding to a distance of 3.8 R S from Saturn's center consistent with the distances reported by Russell and Blanco ‐ Cano [2007]. Finally the observation of 17 February shows the existence of ion‐cyclotron waves at the fundamental mode of O + , H 3 O + , and O 2 + ions in a similar range to the March observation but with a cutoff of ∼1.5 h between 00:30 UT and 02:00 UT for O + and H 3 O + .…”

Section: Observations Of Harmonic Mode Wavessupporting

confidence: 83%

“…The ion‐cyclotron instability in these regions is generated by water‐group ions (O + , OH + , H 2 O + , or H 3 O + ) picked up from the E‐ring neutral cloud that form rings in velocity space. Ion‐cyclotron waves are important as diagnostic of processes operating in the magnetosphere and can provide insight of the composition of the plasma producing the waves [ Russell and Blanco ‐ Cano , 2007].…”

Section: Introductionmentioning

confidence: 99%

“…In this case waves are seen at the gyrofrequency of SO 2 + , SO + , and S + ions with amplitudes approaching 100 nT peak to peak. The waves begin about 20 Io radii outward from Io [ Huddleston et al , 1999; Russell and Blanco‐Cano , 2007]. Observations during the Galileo J0 pass found waves with propagation angles of θ = 0°–20° and ellipticity between −0.6 and −0.8.…”

Section: Introductionmentioning

confidence: 99%

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Harmonic growth of ion‐cyclotron waves in Saturn's magnetosphere

et al. 2010

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[1] Ion-cyclotron waves have been observed by the Cassini spacecraft in Saturn's middle magnetosphere. Waves have frequencies near the gyrofrequencies of water-group ions, they are left handed, and in most regions they propagate at small angles to the ambient magnetic field. Their origin is explained in terms of the ion-cyclotron instability generated by water-group ions picked up from Saturn's neutral cloud. Additionally, in some regions dynamic spectra reveal the existence of fluctuations at approximately twice the value of the ion gyrofrequency. These waves have a significant compressional component and propagate at oblique angles to the magnetic field. Their characteristics suggest that these fluctuations can be identified as a harmonic mode (n = 2) generated by the ring distributions of pickup ions. In this work we study in detail the characteristics of these harmonic mode waves. We also evaluate growth rates using a kinetic dispersion analysis.

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Section: Observations Of Harmonic Mode Wavessupporting

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Harmonic growth of ion‐cyclotron waves in Saturn's magnetosphere

et al. 2010

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“…They have been observed in a variety of space environments, including those upstream of and those within planetary magnetospheres (e.g., Russell & Blanco-Cano 2007). These waves are often caused by newly created ions, accelerated by the electric field of a magnetized plasma flowing through a neutral gas from which the ions were produced (Gary 1991;Huddleston & Johnstone 1992).…”

Section: Introductionmentioning

confidence: 99%

ION CYCLOTRON WAVES IN THE SOLAR WIND OBSERVED BY STEREO NEAR 1 AU

Jian

Russell

Luhmann

et al. 2009

ApJ

143

148

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Using high-resolution magnetic field data from the STEREO mission, we have observed strong narrow-band ion cyclotron waves (ICWs) in the solar wind near 1 AU. The waves propagate nearly parallel to the magnetic field and are below the local proton gyrofrequency in the solar wind frame. Because the twin STEREO spacecraft were far away from any planet, including the Earth, the waves do not have a planetary source. The ICWs often appear when the interplanetary magnetic field is more radial than the nominal Parker spiral. Since the wave frequency in the spacecraft frame is higher than the local proton gyrofrequency, the waves are not locally generated by ion pickup. Observations are consistent with wave generation closer to the Sun and outward transport by the superAlfvénic solar wind. The waves are intrinsically left-hand polarized in the solar wind frame, but appear to be both left-and right-handed in the spacecraft frame, associated with outward and inward propagation, respectively. The relative amplitudes of the left-handed and right-handed waves support the closer-to-Sun generation scenario.

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“…It may be possible to detect these waves using the ARTEMIS vector magnetic field data. Waves from pickup ions have been identified in the plasma environments of many solar system bodies, including Venus, Mars, and even the moons of the giant planets (Russell et al 1990;Kivelson et al 1996;Paterson et al 1999;Grebowsky et al 2004;Dougherty et al 2006;Russell and Blanco-Cano 2007;Delva et al 2008), and their presence or absence can be used to constrain the local density of pickup ions, and therefore the source strength.…”

Section: Exospheric Ions and Plasma Pick-upmentioning

confidence: 99%

ARTEMIS Science Objectives

Sibeck¹,

Angelopoulos²,

Brain³

et al. 2011

The ARTEMIS Mission

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NASA's two spacecraft ARTEMIS mission will address both heliospheric and planetary research questions, first while in orbit about the Earth with the Moon and subsequently while in orbit about the Moon. Heliospheric topics include the structure of the Earth's magnetotail; reconnection, particle acceleration, and turbulence in the Earth's magnetosphere, at the bow shock, and in the solar wind; and the formation and structure of the D.G. Sibeck ( ) Code 674, GSFC/NASA,

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Ion-cyclotron wave generation by planetary ion pickup

Cited by 24 publications

References 30 publications

Harmonic growth of ion‐cyclotron waves in Saturn's magnetosphere

Harmonic growth of ion‐cyclotron waves in Saturn's magnetosphere

ION CYCLOTRON WAVES IN THE SOLAR WIND OBSERVED BY STEREO NEAR 1 AU

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