Artículo
Abstract:
Context: Observations of magnetic clouds (MCs) are consistent with the presence of flux ropes detected in the solar wind (SW) a few days after their expulsion from the Sun as coronal mass ejections (CMEs). Aims: Both the in situ observations of plasma velocity profiles and the increase of their size with solar distance show that MCs are typically expanding structures. The aim of this work is to derive the expansion properties of MCs in the inner heliosphere from 0.3 to 1 AU. Methods: We analyze MCs observed by the two Helios spacecraft using in situ magnetic field and velocity measurements. We split the sample in two subsets: those MCs with a velocity profile that is significantly perturbed from the expected linear profile and those that are not. From the slope of the in situ measured bulk velocity along the Sun-Earth direction, we compute an expansion speed with respect to the cloud center for each of the analyzed MCs. Results: We analyze how the expansion speed depends on the MC size, the translation velocity, and the heliocentric distance, finding that allMCs in the subset of non-perturbed MCs expand with almost the same non-dimensional expansion rate (ζ).We find departures from this general rule for ζ only for perturbed MCs, and we interpret the departures as the consequence of a local and strong SW perturbation by SW fast streams, affecting the MC even inside its interior, in addition to the direct interaction region between the SW and the MC. We also compute the dependence of the mean total SW pressure on the solar distance and we confirm that the decrease of the total SW pressure with distance is the main origin of the observed MC expansion rate. We found that ζ was 0.91 ± 0.23 for non-perturbed MCs while ζ was 0.48 ± 0.79 for perturbed MCs, the larger spread in the last ones being due to the influence of the solar wind local environment conditions on the expansion. © ESO 2010.
Registro:
| Documento: | Artículo |
| Título: | Global and local expansion of magnetic clouds in the inner heliosphere |
| Autor: | Gulisano, A.M.; Démoulin, P.; Dasso, S.; Ruiz, M.E.; Marsch, E. |
| Filiación: | Instituto de Astronomía y Física del Espacio, CONICET-UBA, CC. 67, Suc. 28, 1428 Buenos Aires, Argentina Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, 1428 Buenos Aires, Argentina Observatoire de Paris, LESIA, UMR 8109 (CNRS), 92195 Meudon Principal Cedex, France Max-Planck-Institut für Sonnensystemforschung, 37191 Katlenburg-Lindau, Germany |
| Palabras clave: | Coronal mass ejections (CMEs) - Solar wind - Interplanetary medium; Magnetic fields - Magnetohydrodynamics (MHD) - Sun; Astrophysics; Boundary layer flow; Clouds; Interplanetary spacecraft; Magnetic fields; Magnetohydrodynamics; Semiconductor counters; Solar wind; Sun; Velocity; Velocity measurement; Coronal mass ejection; Coronal mass ejections (CMEs) - Solar wind - Interplanetary medium; Interplanetary medium; Magnetohydrodynamics suns; Expansion |
| Año: | 2010 |
| Volumen: | 509 |
| Número: | 1 |
| DOI: | http://dx.doi.org/10.1051/0004-6361/200912375 |
| Título revista: | Astronomy and Astrophysics |
| Título revista abreviado: | Astron. Astrophys. |
| ISSN: | 00046361 |
| CODEN: | AAEJA |
| PDF: | https://bibliotecadigital.exactas.uba.ar/download/paper/paper_00046361_v509_n1_p_Gulisano.pdf |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046361_v509_n1_p_Gulisano |
Referencias:
- Berdichevsky, D.B., Lepping, R.P., Farrugia, C.J., (2003) Phys. Rev. e, 67, p. 036405
- Bothmer, V., Schwenn, R., (1998) Annales Geophys., 16, p. 1
- Burlaga, L., Berdichevsky, D., Gopalswamy, N., Lepping, R., Zurbuchen, T., (2003) J. Geophys. Res., 108, pp. A01425
- Burlaga, L., Sittler, E., Mariani, F., Schwenn, R., (1981) J. Geophys. Res., 86, p. 6673
- Burlaga, L.F., (1995) Interplanetary Magnetohydrodynamics, , New York: Oxford University Press
- Dasso, S., Mandrini, C.H., Démoulin, P., Luoni, M.L., (2006) A&A, 455, p. 349
- Dasso, S., Mandrini, C.H., Schmieder, B., (2009) J. Geophys. Res., 114, pp. A02109
- Dasso, S., Nakwacki, M.S., Démoulin, P., Mandrini, C.H., (2007) Sol. Phys., 244, p. 115
- Démoulin, P., Dasso, S., (2009) A&A, 498, p. 551
- Démoulin, P., Nakwacki, M.S., Dasso, S., Mandrini, C.H., (2008) Sol. Phys., 250, p. 347
- Farrugia, C.J., Burlaga, L.F., Osherovich, V.A., (1993) J. Geophys. Res., 98, p. 7621
- Farrugia, C.J., Osherovich, V.A., Burlaga, L.F., (1997) Annales Geophysicae, 15, p. 152
- Feng, H.Q., Wu, D.J., Chao, J.K., (2007) J. Geophys. Res., 112, pp. A02102
- Gosling, J.T., Bame, S.J., McComas, D.J., (1994) Geophys. Res. Lett., 21, p. 237
- Gosling, J.T., Bame, S.J., McComas, D.J., (1995) Space Sci. Rev., 72, p. 133
- Gulisano, A.M., Dasso, S., Mandrini, C.H., Démoulin, P., (2007) Adv. Spa. Res., 40, p. 1881
- Klein, L.W., Burlaga, L.F., (1982) J. Geophys. Res., 87, p. 613
- Leitner, M., Farrugia, C.J., Möstl, C., (2007) J. Geophys. Res., 112, pp. A06113
- Liu, Y., Richardson, J.D., Belcher, J.W., (2005) Planet. Space Sci., 53, p. 3
- Lynch, B.J., Zurbuchen, T.H., Fisk, L.A., Antiochos, S.K., (2003) J. Geophys. Res., 108, pp. A01239
- Mandrini, C.H., Nakwacki, M., Attrill, G., (2007) Sol. Phys., 244, p. 25
- Mariani, F., Neubauer, F.M., (1990) The Interplanetary Magnetic Field (Physics of the Inner Heliosphere I), 183
- Marsch, E., Yao, S., Tu, C.-Y., (2009) Annales Geophys., 27, p. 869
- Marsch, E., Schwenn, R., Rosenbauer, H., (1982) J. Geophys. Res., 87, p. 52
- Marsch, E., Thieme, K.M., Rosenbauer, H., Pilipp, W.G., (1989) J. Geophys. Res., 94, p. 6893
- Nakwacki, M., Dasso, S., Démoulin, P., Mandrini, C.H., (2008) Geof. Int., 47, p. 295
- Nakwacki, M., Dasso, S., Mandrini, C., Demoulin, P., (2008) J. Atmos. Sol. Terr. Phys., 70, p. 1318
- Neubauer, F.M., Beinroth, H.J., Barnstorf, H., Dehmel, G., (1977) J. Geophys., 42, p. 599
- Osherovich, V.A., Farrugia, C.J., Burlaga, L.F., (1993) J. Geophys. Res., 98, p. 13225
- Richardson, I.G., Cane, H.V., (1995) J. Geophys. Res., 100, p. 23397
- Richardson, I.G., Cane, H.V., (2004) J. Geophys. Res., 109, pp. A09104
- Rosenbauer, H., Schwenn, R., Marsch, E., (1977) J. Geophys., 42, p. 561
- Schwenn, R., (2006) Living Rev. Sol. Phys., 3, p. 2
- Shimazu, H., Vandas, M., (2002) Earth Planets, and Space, 54, p. 783
- Steed, K., Owen, C.J., Harra, L.K., (2008) Annales Geophys., 26, p. 3159
- Totten, T.L., Freeman, J.W., Arya, S., (1995) J. Geophys. Res., 100, p. 13
- Tripathi, D., Solanki, S.K., Schwenn, R., (2006) A&A, 449, p. 369
- Tsurutani, B.T., Gonzalez, W.D., Zhou, X.-Y., Lepping, R.P., Bothmer, V., (2004) J. Atmos. Sol. Terr. Phys., 66, p. 147
- Vandas, M., Romashets, E.P., Watari, S., (2005) Solar Wind 11/SOHO 16, Connecting Sun and Heliosphere, ESA SP-592, , ed. B. Fleck, T. H. Zurbuchen, & H. Lacoste, 159.1 (on CDROM)
- Wang, C., Du, D., Richardson, J.D., (2005) J. Geophys. Res., 110, pp. A10107
- Xiong, M., Zheng, H., Wu, S.T., Wang, Y., Wang, S., (2007) J. Geophys. Res., 112, pp. A011103
- Yurchyshyn, V., Liu, C., Abramenko, V., Krall, J., (2006) Sol. Phys., 239, p. 317
Citas:
---------- APA ----------
Gulisano, A.M., Démoulin, P., Dasso, S., Ruiz, M.E. & Marsch, E. (2010) . Global and local expansion of magnetic clouds in the inner heliosphere. Astronomy and Astrophysics, 509(1).http://dx.doi.org/10.1051/0004-6361/200912375
---------- CHICAGO ----------
Gulisano, A.M., Démoulin, P., Dasso, S., Ruiz, M.E., Marsch, E. "Global and local expansion of magnetic clouds in the inner heliosphere" . Astronomy and Astrophysics 509, no. 1 (2010).http://dx.doi.org/10.1051/0004-6361/200912375
---------- MLA ----------
Gulisano, A.M., Démoulin, P., Dasso, S., Ruiz, M.E., Marsch, E. "Global and local expansion of magnetic clouds in the inner heliosphere" . Astronomy and Astrophysics, vol. 509, no. 1, 2010.http://dx.doi.org/10.1051/0004-6361/200912375
---------- VANCOUVER ----------
Gulisano, A.M., Démoulin, P., Dasso, S., Ruiz, M.E., Marsch, E. Global and local expansion of magnetic clouds in the inner heliosphere. Astron. Astrophys. 2010;509(1).http://dx.doi.org/10.1051/0004-6361/200912375
