4.3.6 Interplanetary particles and magnetic fields

Klecker, B.

doi:10.1007/978-3-540-88055-4_33

Cited by 2 publications

(2 citation statements)

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“…The dust larger than 10 −15 kg is in Keplerian orbits. Further discussion can be found in the reference Mann et al (2010b). 0.038N p < N α < 0.048N p (Klecker, 2009;Schwenn, 1983) for the alpha particle density, we get 0.15 < S α < 0.19. In the simple model of Eq.…”

Section: An Extended Version Of the Treumann And Baumjohann Modelmentioning

confidence: 65%

Dust dynamic pressure and magnetopause displacement: reasons for non-detection

Mann

Hamrin

2013

Ann. Geophys.

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Abstract. In a recent paper, Treumann and Baumjohann (2011) propose that the contribution of dust particles to the solar wind dynamic pressure can cause large compressions of the Earth's magnetopause and suggest that this occurs when Earth encounters meteoroid streams. In this paper we estimate the contribution from charged dust particles to the solar wind dynamical pressure, and we exclude that the dust associated to meteoroid streams can influence the extension of the magnetopause according to the proposed model. A sufficient coupling to the solar wind is only expected for so-called nanodust. However, the dynamic pressure of the nanodust is orders of magnitudes below that of the solar wind, making it unlikely that its variation can be observed in displacements of the magnetopause. We also discuss the equation that the authors use for estimating the extension of the Earth's magnetopause, and conclude that this is not applicable due to the large gyroradius of the nanodust. We finally note that an influence of dust on the extension of a magnetosphere might be quite possible in other astrophysical systems and based on other processes.

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