The planetary–exoplanetary environment: A nonlinear perspective

Chian, Abraham C.‐L.; Han, Maoan; Miranda, Rodrigo A.; Shu, C. G.; Valdivia, J. A.

doi:10.1016/j.asr.2009.07.031

Cited by 6 publications

(4 citation statements)

References 82 publications

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“…Our methodology can be readily applied to other turbulent boundary layers of astrophysical plasmas, such as termination and bow shocks of the heliosphere and astrospheres (Stone et al 2008;Sahai & Chronopoulos 2010). Further studies of the magnetic-cloud-solar-wind coupling will improve our understanding of the dynamics of star-planet relation and search for exoplanets (Kivelson 2007;Chian et al 2010a).…”

Section: Resultsmentioning

confidence: 99%

Detection of Current Sheets and Magnetic Reconnections at the Turbulent Leading Edge of an Interplanetary Coronal Mass Ejection

Chian

Muñoz

2011

ApJ

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The relation between current sheets, turbulence, and magnetic reconnections at the leading edge of an interplanetary coronal mass ejection detected by four Cluster spacecraft on 2005 January 21 is studied. We report the observational evidence of two magnetically reconnected current sheets in the vicinity of a front magnetic cloud boundary layer with the following characteristics: (1) a Kolmogorov power spectrum in the inertial subrange of the magnetic turbulence, (2) the scaling exponent of structure functions of magnetic fluctuations exhibiting multi-fractal scaling predicted by the She-Leveque magnetohydrodynamic model, and (3) bifurcated current sheets with the current density computed by both single-spacecraft and multi-spacecraft techniques.

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Section: Resultsmentioning

confidence: 99%

Detection of Current Sheets and Magnetic Reconnections at the Turbulent Leading Edge of an Interplanetary Coronal Mass Ejection

Chian

Muñoz

2011

ApJ

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“…. There is no room for citing all these papers here, but most of them are discussed in [Chian et al, 2010] (together with the role of plasma turbulence on radio emission generation in exoplanetary magnetospheres). The above scaling laws have been applied to the exoplanet census by Lazio et al [2004] (considering only the "radio-to-kinetic" scaling law) and by Griessmeier et al [2007] (considering several scaling laws including the "radio-tomagnetic" one).…”

Section: Tentative Optical Detection and More Theoretical Workmentioning

confidence: 99%

The Search for Exoplanetary Radio Emissions (invited)

Zarka¹

2011

Planetary Radio Emissions Vii

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A chronological review of this relatively recent subject is presented, from the discovery of the first exoplanet-orbiting a pulsar-to theoretical predictions and ongoing searches conducted with most large low-frequency radiotelescopes. The specific interest of radio observations is emphasized. 1 Historical Landmarks "Pre"-history of the field started with Yantis et al. [1977], Winglee et al. [1986], Lecacheux [1991], and Burke [1992], all making an analogy between Jupiter and putative exoplanets and suggesting to look for radio emissions of the latter. Most of them noticed that the high intensity of the galactic background is a serious drawback to the detectability of such emissions (see below). Winglee et al. [1986] conducted in addition a first search using the VLA at 330 MHz and 1.4 GHz, with negative results. The first exoplanet was discovered around the pulsar PSR1257+12, by pulse arrival timing, using the Arecibo radiotelescope at 430 MHz [Wolszczan and Frail, 1992]. In the same year, a Nançay-Meudon/Graz/Kharkov collaboration started around the use of the UTR-2 radiotelescope [Braude et al., 1978] together with modern Nançay receivers. The first tentative exoplanet search at UTR-2 started in 1995, in parallel with Jupiter studies, using an Acousto-Optical Spectrograph (AOS-[Raterron, 1985]) in the band 18-28 MHz. Its principles and method were presented at the first French workshop on exoplanet search, held at the Observatoire de Haute-Provence [Zarka, 1995]. In october 1995, the discovery of 51 Peg B around a solar type star [Mayor and Queloz, 1995] marked the true birth of a new field, which counts today >500 known exoplanets (see exoplanet.eu).

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“…The relevance of our study is to demonstrate the fact that a theoretical description requires an appropriate kappa model to study a physical process in solar flares and solar winds and generates magnetic field in plasma heating process. In closing, we wish to remark that our results may also apply to perpendicular propagation of ordinary wave excited by the cross field ion drift in the magnetotail region of planetary magnetospheres [ Lui et al , ] supported by in situ satellite observations, which is relevant for the understanding of chaotic nature of solar‐terrestrial environment and the onset of substorms in planets and exoplanets [ Chian et al , , ].…”

Section: Discussionmentioning

confidence: 93%

On the ordinary mode Weibel instability in space plasmas: A comparison of three‐particle distributions

2016

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Electromagnetic wave fluctuations driven by temperature anisotropy in plasmas are of interest for solar flare, solar corona, and solar wind studies. We investigate the dispersion characteristics of electromagnetic wave propagating perpendicular to the uniform magnetic field which is derived by using multiple particle distribution functions: Maxwellian, bi‐kappa, and product bi‐kappa. The presence of temperature anisotropy in which the parallel plasma kinetic energy density exceeding by a sufficient amount can lead to Weibel‐like electromagnetic instability. A general description is made to calculate the growth/damping rates of Weibel‐like modes when the temperature anisotropy and nonthermal features are associated with these distributions. We demonstrate that for the zeroth cyclotron harmonic, our results for bi‐Maxwellian and bi‐kappa overlap with each other, while the product bi‐kappa distribution shows some dependence on parallel kappa index. For higher harmonics, the growth rates vanish and the damping prevails.

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The planetary–exoplanetary environment: A nonlinear perspective

Cited by 6 publications

References 82 publications

Detection of Current Sheets and Magnetic Reconnections at the Turbulent Leading Edge of an Interplanetary Coronal Mass Ejection

Detection of Current Sheets and Magnetic Reconnections at the Turbulent Leading Edge of an Interplanetary Coronal Mass Ejection

The Search for Exoplanetary Radio Emissions (invited)

On the ordinary mode Weibel instability in space plasmas: A comparison of three‐particle distributions

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