10:00 AM - 10:15 AM
[PEM15-29] Characteristics of slow-mode shocks in the dayside magnetopause observed by MMS
We investigated characteristics of slow-mode shocks in the dayside magnetopause based on MMS observations from September 2015 to February 2017. We analyzed 99 magnetopause crossings with reconnection jets and burst-mode (high time resolution) data, out of which 21 slow-mode shock signatures were found. 7 slow-mode shocks were observed on the magnetosphere side while 14 on the magnetosheath side. The detection probability of slow-mode shocks in the magnetopause (~20%) is greater than that reported in the magnetotail. We also found 12 rotational discontinuities in these slow-mode shock events. 9 of these rotational discontinuities were observed towards the magnetosheath side. The results also show that the observation of magnetosphere slow-mode shock is favored when the number densities of magnetosphere and magnetosheath are comparable. No clear dependence of existence of slow-mode shocks on other parameters such as, plasma beta, temperature anisotropy, jet velocity was found.
Biernat, H. K., et. al. (1989) J. Geophys. Res., 94(A1), 287–298. doi:10.1029/JA094iA01p00287
Eriksson, S., et al. (2004) J. Geophys. Res., 109, A10212. doi:10.1029/2004JA010534.
Feldman, W. C., et al. (1984) Geophys. Res. Lett., 11: 599–602. doi:10.1029/GL011i006p00599
Hau, L.-N., & Wang, B.-J. (2016) J. Geophys. Res., Space Physics, 121, 6245–6261. doi:10.1002/2016JA022722
Heyn, M. F., et. al. (1985) J. Geophys. Res., 90(A2), 1781–1785. doi:10.1029/JA090iA02p01781
Hoshino, M., & Nishida, A. (1983) J. Geophys. Res., , 88(A9), 6926–6936. doi:10.1029/JA088iA09p06926
Levy, R. H., et. al. (1964) AIAA Journal, Vol. 2, No. 12, pp. 2065-2076. doi:10.2514/3.2745
Petschek, H. E. (1964) NASA Special Publication 50, 425
Saito, Y., et al. (1995) J. Geophys. Res., , 100(A12), 23567–23581. doi:10.1029/95JA01675
Sonnerup, B., et al. (2016) J. Geophys. Res., 121, 3310–3332. doi:10.1002/2016JA022362
Walthour, D. W., et. al. (1994) J. Geophys. Res., 99(A12), 23705–23722. doi:10.1029/94JA01767