Tenuous solar winds: Insights on solar wind-magnetosphere interactions

During solar cycle 23 quasi-dropouts of the solar wind (density < 1 cm- 3) were observed. These tenuous winds allow us to probe properties of the magnetosphere and its coupling to the solar wind which would otherwise be obscured by the effect of high density. We focus on five areas which prov...

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Autor principal: Farrugia, C.J
Otros Autores: Gratton, Fausto Tulio Livio, Jordanova, V.K, Matsui, H., Mühlbachler, S., Torbert, R.B, Ogilvie, K.W, Singer, H.J
Formato: Capítulo de libro
Lenguaje:Inglés
Publicado: 2008
Acceso en línea:Registro en Scopus
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100 1 |a Farrugia, C.J. 
245 1 0 |a Tenuous solar winds: Insights on solar wind-magnetosphere interactions 
260 |c 2008 
270 1 0 |m Farrugia, C.J.; Space Science Center, University of New Hampshire, Durham, NH, United States; email: charlie.farrugia@unh.edu 
504 |a Anderson, B.J., 1995. In: Song, P., Sonnerup, B.U.O., Thomsen, M. (Eds.), Physics of the Magnetopause Geophysical Monograph, vol. 90, p. 269; Fairfield, D.H., Scudder, J.D., (1985) Journal of Geophysical Research, 90, p. 4055 
504 |a Farrugia, C.J., Singer, H.J., Evans, D.S., (2000) Geophysical Research Letters, 27, p. 3773 
504 |a Farrugia, C.J., Mühlbachler, S., Biernat, H.K., Torbert, R.B., (2001) Journal of Geophysical Research, 106, pp. 25,517 
504 |a Farrugia, C.J., Gratton, F.T., Gnavi, G., (2005) Annales de Geophysique, 23, p. 1317 
504 |a Jordanova, V., Farrugia, C.J., Quinn, J.M., (1999) Journal of Geophysical Research, 104, p. 429 
504 |a Jordanova, V., Farrugia, C.J., Fennell, J.F., Scudder, J.D., (2001) Journal of Geophysical Research, 106, pp. 25,529 
504 |a Jorgensen, A.M., Spence, H.E., Hughes, W.J., Singer, H.J., 2004. Journal of Geophysical Research 109, A12204 doi:10.1029/2003JA010090; Le, G., Chi, P.J., Goedecke, W., (2000) Geophysical Research Letters, 27, p. 2165 
504 |a Maynard, N.C., Chen, A.J., (1975) Journal of Geophysical Research, 80, p. 1009 
504 |a Nakagawa, T., Nishida, A., Saito, T., (1989) Journal of Geophysical Research, 94, p. 11761 
504 |a Ogilvie, K.W., (1995) Space Science Reviews, 71, p. 55 
504 |a Ogilvie, K.W., Fitzenreiter, R., Desch, M., (2000) Journal of Geophysical Research, 105 (A12), pp. 27,277 
504 |a Richardson, I.G., Berdichevsky, D., Desch, M.D., Farrugia, C.J., (2001) Geophysical Research Letters, 27, p. 3761 
504 |a Scudder, J.D., (1995) Space Science Reviews, 71, p. 459 
504 |a Sibeck, D.G., (1994) Journal of Geophysical Research, 99, p. 8513 
504 |a Sonnerup, B.U.O., Cahill, L.J., (1967) Journal of Geophysical Research, 72, p. 171 
504 |a Stern, D.P., (1975) Journal of Geophysical Research, 80, p. 595 
504 |a Volland, H., (1973) Journal of Geophysical Research, 78, p. 171 
506 |2 openaire  |e Política editorial 
520 3 |a During solar cycle 23 quasi-dropouts of the solar wind (density < 1 cm- 3) were observed. These tenuous winds allow us to probe properties of the magnetosphere and its coupling to the solar wind which would otherwise be obscured by the effect of high density. We focus on five areas which provided new insights into the response of geospace to solar wind variations: (i) the magnetospheric magnetic configuration; (ii) the polar rain; (iii) dayside flux erosion; (iv) magnetosheath waves; and (v) ring current constants. We find: (i) the geostationary field had dipolar strength and was inclined by ≤ 5{ring operator} to the dipolar direction; (ii) the solar wind strahl, and consequently the polar rain, were intensified; (iii) the depression of the geostationary field (Δ BGS) due to dayside flux erosion could be measured and was related to IMF Bz by Δ BGS = - 2.8 + 2.3 Bz (nT); (iv) right-hand electromagnetic ion cyclotron waves were excited alone in the magnetosheath and were generated directly from the temperature anisotropy of the solar wind; (v) ring and magnetopause currents decreased to asymptotic values of 5 and 3 nT, respectively, which are substantially smaller than quiet-time values obtained from statistics. © 2007 Elsevier Ltd. All rights reserved.  |l eng 
536 |a Detalles de la financiación: National Aeronautics and Space Administration, NNG06GD41G, NNG05GC75G, NAG5–13512 
536 |a Detalles de la financiación: University of New Hampshire 
536 |a Detalles de la financiación: We thank T. Nagai for the Geotail magnetometer data This work is supported in part by NASA Grants NNG05GC75G, NNG06GD41G, WIND-SWE and NAG5–13512 and MFI Analysis and STEREO grant to UNH. F.T.G. acknowledges supports of Argentinian grants, CONICET PIP5291, and UBACyT X291. 
593 |a Space Science Center, University of New Hampshire, Durham, NH, United States 
593 |a INFIP, CONICET-FCEyN, UBA, Buenos Aires, Argentina 
593 |a Los Alamos National Lab, Los Alamos, NM, United States 
593 |a Max-Planck Institut fuer Sonnensystemforschung, Kathlenburg, Lindau, Germany 
593 |a NASA Goddard Space Flight Center, Greenbelt, MD, United States 
593 |a NOAA Space Environment Center, Boulder, CO, United States 
690 1 0 |a DAYSIDE EROSION 
690 1 0 |a LOW DENSITY SOLAR WIND 
690 1 0 |a MAGNETOSHEATH WAVES 
690 1 0 |a QUIET-TIME RING CURRENT CONSTANTS 
690 1 0 |a ELECTROMAGNETIC WAVES 
690 1 0 |a GEOMAGNETISM 
690 1 0 |a MAGNETIC ANISOTROPY 
690 1 0 |a MAGNETIC FIELDS 
690 1 0 |a MAGNETOSPHERE 
690 1 0 |a STATISTICS 
690 1 0 |a MAGNETOSHEATH WAVE 
690 1 0 |a RING CURRENT CONSTANT 
690 1 0 |a SOLAR WIND 
700 1 |a Gratton, Fausto Tulio Livio 
700 1 |a Jordanova, V.K. 
700 1 |a Matsui, H. 
700 1 |a Mühlbachler, S. 
700 1 |a Torbert, R.B. 
700 1 |a Ogilvie, K.W. 
700 1 |a Singer, H.J. 
773 0 |d 2008  |g v. 70  |h pp. 371-376  |k n. 2-4  |p J. Atmos. Sol.-Terr. Phys.  |x 13646826  |w (AR-BaUEN)CENRE-5432  |t Journal of Atmospheric and Solar-Terrestrial Physics 
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