Comparison of properties of upstream whistlers at different planets

Orlowski, D. S.; Russell, C. T.

doi:10.1016/0273-1177(95)00220-9

Cited by 24 publications

(29 citation statements)

References 6 publications

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“…Similar monochromatic whistler waves have been observed in the upstream region of bow shocks of many solar system bodies including Mercury, Venus, Earth, Mars, and Saturn (Orlowski and Russell, 1995;Brain et al, 2002). These waves are called "upstream whistler waves" or simply "1 Hz waves".…”

Section: Reported That the Intense Monochromatic Whistlermentioning

confidence: 60%

Statistical analysis of monochromatic whistler waves near the Moon detected by Kaguya

et al. 2011

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Abstract.Observations are presented of monochromatic whistler waves near the Moon detected by the Lunar Magnetometer (LMAG) on board Kaguya. The waves were observed as narrowband magnetic fluctuations with frequencies close to 1 Hz, and were mostly left-hand polarized in the spacecraft frame. We performed a statistical analysis of the waves to identify the distributions of their intensity and occurrence. The results indicate that the waves were generated by the solar wind interaction with lunar crustal magnetic anomalies. The conditions for observation of the waves strongly depend on the solar zenith angle (SZA), and a high occurrence rate is recognized in the region of SZA between 40 • to 90 • with remarkable north-south and dawndusk asymmetries. We suggest that ion beams reflected by the lunar magnetic anomalies are a possible source of the waves.

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Section: Reported That the Intense Monochromatic Whistlermentioning

confidence: 60%

Statistical analysis of monochromatic whistler waves near the Moon detected by Kaguya

et al. 2011

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“…Other relevant wave-particle interactions involve whistlers generated by atmospheric lightening and electron plasma oscillations associated with suprathermal particles in the upstream solar wind. Such whistler mode waves have been observed in the magnetosphere of Jupiter and Uranus [4][5][6][7][8] and in the solar wind upstream of Mercury, Venus, Earth and Saturn [9]. Voyager 2 encounter of Uranus on 24 January 1986 revealed a strong planetary magnetic field, an associated magnetosphere and fully bipolar magnetic tail of Uranus.…”

Section: Introductionmentioning

confidence: 99%

Study of Whistler Mode Wave by Injection of Relativistic Hot Electrons Beam in the Magnetosphere of Uranus

Pandey¹,

Kaur²

2014

PIER M

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Abstract-In present paper, the effect of relativistic hot electron beam for field aligned Whistler mode waves has been studied theoretically in the presence of AC electric field perpendicular to magnetic field. Studies have been performed using perturbative approach along with the method of characteristic solutions and are valid for comparatively small ambient magnetic field of Uranus, of the order of nano Tesla, as observed by Voyager 2. The detailed derivation and calculations has been done for dispersion relation and growth rate for magnetosphere of Uranus. Analyses are done by changing various plasma parameters which are explained in result and discussions section of this paper. Extensive study of waveparticle interactions and numerical calculations concludes that in case of injection of a distribution of particles having a positive slope in v ⊥ , temperature anisotropy remains the main source of free energy. It is seen that other effective parameters for the growth of whistler mode waves are AC frequency and higher number density of hot electrons. We also learn that even the minimal presence of such energetic particles having a positive slope of distribution function and increasing power of perpendicular thermal velocity can increase the growth rate significantly in the magnetosphere of Uranus. The present work is basically based upon the theoretical investigation and mathematical analysis of the magnetosphere of Uranus, supported by satellite data.

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“…Even though the narrowband upstream whistler-mode waves have been observed for four decades around various bodies in the solar wind (Orlowski and Russell 1995), their harmonics have never been reported. It seems to be natural that the waves hardly steepen since their narrowband spectra in the spacecraft frame can be formed from waves in the plasma frame with a broader frequency band and smaller amplitudes than those of observed waves.…”

Section: Introductionmentioning

confidence: 99%

“…Upstream whistler-mode waves with narrowband spectra in the frequencies near 1 Hz have been observed in the solar wind around the Moon (Halekas et al 2006;Tsugawa et al 2011) and many solar system bodies (Orlowski and Russell 1995;Russell 2007). They are mostly left-hand polarized in the spacecraft frame due to large Doppler shift by the solar wind (Fairfield 1974).…”

Section: Introductionmentioning

confidence: 99%

“…They are mostly left-hand polarized in the spacecraft frame due to large Doppler shift by the solar wind (Fairfield 1974). The similarities of the wave properties throughout the solar system imply that the wave formation processes are independent of the shape and size of the obstacle (Orlowski and Russell 1995). Recently, Tsugawa et al (2014) proposed that the waves are group-standing, i.e., they are nearly stagnated in the spacecraft frame.…”

Section: Introductionmentioning

confidence: 99%

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Harmonics of whistler-mode waves near the Moon

Tsugawa

Katoh

Terada

et al. 2015

Earth, Planets and Space

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Harmonic spectral features of electromagnetic waves in the frequencies of several Hz around the Moon have been identified by Kaguya. The waves have steepened waveforms peculiarly in the compressional component. The fundamental waves have almost the same properties as narrowband whistler-mode waves with the frequencies near 1 Hz, which have been observed around the Moon. The waves are observed around the terminator region in the solar wind near the lunar magnetic anomalies at the altitudes under 120 km. We suggest that the harmonic spectra are a result of the nonlinear steepening of narrowband whistler-mode waves. Although the narrowband whistler-mode waves have been observed in the upstream region of many planetary bow shocks, such harmonics have rarely been observed there. Since the harmonics are more frequently observed at lower altitudes of the Moon, they are possibly caused by lunar intrinsic environments including lunar dusts and local structures of lunar magnetic anomalies.

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Comparison of properties of upstream whistlers at different planets

Cited by 24 publications

References 6 publications

Statistical analysis of monochromatic whistler waves near the Moon detected by Kaguya

Statistical analysis of monochromatic whistler waves near the Moon detected by Kaguya

Study of Whistler Mode Wave by Injection of Relativistic Hot Electrons Beam in the Magnetosphere of Uranus

Harmonics of whistler-mode waves near the Moon

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