Navegar

Colección

Datos Estadísticas

Artículo

Mandrini, C.H.; Démoulin, P.; Van Driel-Gesztelyi, L.; Schmieder, B.; Cauzzi, G.; Hofmann, A. "3D magnetic reconnection at an X-ray bright point" (1996) Solar Physics. 168(1):115-133
El editor solo permite decargar el artículo en su versión post-print desde el repositorio. Por favor, si usted posee dicha versión, enviela a
Consulte el artículo en la página del editor
Consulte la política de Acceso Abierto del editor

Abstract:

On May 1, 1993, a flaring X-ray bright point (XBP) was observed for about 16 hours in the old, disintegrating, bipolar active region (AR) NOAA 7493. During this period, a minor magnetic bipole (1020 Mx) emerged in the region. We have found observational evidence showing that the XBP brightenings were due to magnetic reconnection between the new bipole and pre-existing plage fields. The aim of the present work is to substantiate with magnetic modelling what has been shown by the observations. For this purpose we extrapolate the observed photospheric magnetic fields in the linear force-free approximation and follow its evolution during the lifetime of the XBP. From the computed coronal field lines we determine the location of regions of drastic change in field-line linkage, called 'quasi-separatrix layers' or QSLs. QSLs arc open layers that behave physically like separatrices: the break down of ideal magnetohydrodynamics and the release of free magnetic energy may occur at these locations when their thickness is small enough. The extrapolated field lines, with photospheric footpoints on both sides of QSLs, match the observed chromospheric and coronal structures (arch filament system, XBP and faint X-ray loops (FXL)). We study also the evolution of the width of the QSL located over the new negative polarity pore: the calculated QSL is very thin (typically less than 100 m) during the lifetime of the XBP, but becomes much thicker (≥ 104 m) after the XBP has faded. Furthermore we show that peaks in X-ray brightness propagate along the FXL with a velocity of ≈ 670 km s-1, starting from the XBP location, implying that the energy is released where the emerging bipole impacts against pre-existing coronal loops. We discuss the possible mechanism of energy transport and conclude that the energy is conducted to the remote footpoints of the FXL by a thermal front. These results strongly support the supposition that the XBP brightness and flaring are due to the interaction of different flux systems, through 3D magnetic reconnection, at QSLs. © 1996 Kluwer Academic Publishers.

Registro:

Documento: Artículo
Título:3D magnetic reconnection at an X-ray bright point
Autor:Mandrini, C.H.; Démoulin, P.; Van Driel-Gesztelyi, L.; Schmieder, B.; Cauzzi, G.; Hofmann, A.
Filiación:Instituto de Astronomía y Física del Espacio, IAFE-CONICET, CC.67, Suc. 28, 1428 Buenos Aires, Argentina
Observatoire de Paris, Section de Meudon, DASOP, URA 2080 (CNRS), F-92195 Meudon Cedex, France
Institute for Astronomy, University of Hawaii, Honolulu, HI 96822, United States
Astrophysikaliches Institut Potsdam, Sonnenobservatorium Einsteinturn, D-14473 Potsdam, Germany
Carrera del Investigador Cientifico, CONICET
Konkoly Observatory, Pf. 67, Budapest, H-1525, Hungary
Osservatorio Astronomico di Capodimonte, Napoli, Italy
Año:1996
Volumen:168
Número:1
Página de inicio:115
Página de fin:133
DOI: http://dx.doi.org/10.1007/BF00145829
Título revista:Solar Physics
Título revista abreviado:Sol. Phys.
ISSN:00380938
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00380938_v168_n1_p115_Mandrini

Referencias:

  • Alissandrakis, C.E., (1981) Astron. Astrophys., 100, p. 197
  • Bagalá, L.G., Mandrini, C.H., Rovira, M.G., Démoulin, P., Hénoux, J.C., (1995) Solar Phys., 161, p. 103
  • Bungey, T.N., Titov, V.S., Priest, E.R., (1996) Astron Astrophys., 308, p. 233
  • Campbell, P.M., (1984) Phys. Rev., 30, p. 365
  • Démoulin, P., Van Driel-Gesztelyi, L., Schmieder, B., Hénoux, J.C., Csepura, G., Hagyard, M.J., (1993) Astron. Astrophys., 271, p. 292
  • Démoulin, P., Hénoux, J.C., Mandrini, C.H., (1994) Astron. Astrophys., 285, p. 1023
  • Démoulin, P., Mandrini, C.H., Rovira, M.G., Hénoux, J.C., Machado, M.E., (1994) Solar Phys., 150, p. 221
  • Démoulin, P., Hénoux, J.C., Priest, E.R., Mandrini, C.H., (1996) Astron. Astrophys., 308, p. 643
  • Démoulin, P., Bagalá, L.G., Mandrini, C.H., Hénoux, J.C., Rovira, M.G., (1996) Astron. Astrophys., , submitted
  • Golub, L., Krieger, A.S., Vaiana, G.S., (1976) Solar Phys., 49, p. 79
  • Golub, L., Harvey, J.W., Webb, D.F., (1986) Coronal and Prominence Plasmas, p. 365. , A. I. Poland (ed.), NASA CP-2442
  • Golub, L., Krieger, A.S., Harvey, J.W., Vaiana, G.S., (1977) Solar Phys., 53, p. 111
  • Golub, L., Krieger, A.S., Silk, J.K., Timothy, A.F., Vaiana, G.S., (1974) Astrophys J., 189, pp. L93
  • Gorbachev, V.S., Somov, B.V., (1988) Solar Phys., 117, p. 77
  • Gorbachev, V.S., Somov, B.V., (1989) Soviet Astron., 33 (1), p. 57
  • Harvey, K.L., (1993), Ph.D. Thesis, University of Utrecht, The Netherlands; Harvey, K.L., Nitta, N., Strong, K.T., Tsuneta, S., (1994) X-ray Solar Physics from Yohkoh, p. 21. , Y. Uchida, T. Watanabe, K. Skibata, and H. S. Hudson (eds.), Frontiers Science Series, No. 10
  • Kundu, M.R., Strong, K.T., Pick, M., Harvey, K.L., Kane, S.R., White, S.M., Hudson, H.S., (1994) Proc. of Kofu Symposium, p. 343. , S. Enome and T. Hirayama (eds.). NRO Report No. 360
  • Lau, Y.T., (1993) Solar Phys., 148, p. 301
  • Lau, Y.T., Finn, J.M., (1990) Astrophys. J., 350, p. 672
  • Mandrini, C.H., Démoulin, P., Hénoux, J.C., Machado, M.E., (1991) Astron. Astrophys., 250, p. 541
  • Mandrini, C.H., Rovira, M.G., Démoulin, P., Hénoux, J.C., Machado, M.E., Wilkinson, L.K., (1993) Astron. Astrophys., 272, p. 609
  • Mandrini, C.H., Démoulin, P., Rovira, M.G., De La Beaujardière, J.F., Hénoux, J.C., (1995) Astron. Astrophys., 303, p. 927
  • Martin, S.F., Livi, S.H.B., Wang, J., Shi, Z., (1985) Measurements of Solar Vector Magnetic Fields, p. 403. , M. J. Hagyard (ed.), NASA CP-2374
  • Mickey, D.L., (1985) Solar Phys., 97, p. 223
  • Nolte, J.T., Solodyna, C.V., Gerassimenko, M., (1979) Solar Phys., 63, p. 113
  • Parnell, C.E., Priest, E.R., Golub, L., (1994) Solar Phys., 151, p. 57
  • Priest, E.R., Démoulin, P., (1995) J. Geophys. Res., 100 (A12), p. 23443
  • Priest, E.R., Forbes, T.G., (1992) J. Geophys. Res., 97 (A2), p. 1521
  • Priest, E.R., Titov, V.S., (1996) Phil Trans. Roy. Soc. London, 355. , in press
  • Rust, D.M., Simnett, G.M., Smith, D.F., (1985) Astrophys. J., 288, p. 401
  • Schindler, K., Hesse, M., Birn, J., (1988) J. Geophys. Res., 93, p. 5547
  • Staude, J., Hofmann, A., Bachmann, G., (1991) Solar Polarimetry, p. 49. , L. November (ed.), Sunspot, New Mexico
  • Strong, K.T., Harvey, K.L., Hirayama, T., Nitta, N., Shimizu, T., Tsuneta, S., (1992) Publ. Astron. Soc. Japan, 44, pp. L161
  • Tsuneta, S., Acton, L., Bruner, M., Lemen, J., Brown, W., Caravalho, R., Catura, R., Owens, J., (1991) Solar Phys., 136, p. 37
  • Van Driel-Gesztelyi, L., Hofmann, A., Démoulin, P., Schmieder, B., Csepura, G., (1994) Solar Phys., 149, p. 309
  • Van Driel-Gesztelyi, L., Schmieder, B., Cauzzi, G., Mein, N., Hofmann, A., Nitta, N., Kurokawa, H., Staiger, J., (1996) Solar Phys., 163, p. 145. , Paper 1
  • Van Speybroek, L.P., Krieger, A.S., Vaiana, G.S., (1970) Nature, 227, p. 818
  • Webb, D.F., Martin, S.F., Moses, D., Harvey, J.W., (1993) Solar Phys., 144, p. 15

Citas:

---------- APA ----------
Mandrini, C.H., Démoulin, P., Van Driel-Gesztelyi, L., Schmieder, B., Cauzzi, G. & Hofmann, A. (1996) . 3D magnetic reconnection at an X-ray bright point. Solar Physics, 168(1), 115-133.
http://dx.doi.org/10.1007/BF00145829
---------- CHICAGO ----------
Mandrini, C.H., Démoulin, P., Van Driel-Gesztelyi, L., Schmieder, B., Cauzzi, G., Hofmann, A. "3D magnetic reconnection at an X-ray bright point" . Solar Physics 168, no. 1 (1996) : 115-133.
http://dx.doi.org/10.1007/BF00145829
---------- MLA ----------
Mandrini, C.H., Démoulin, P., Van Driel-Gesztelyi, L., Schmieder, B., Cauzzi, G., Hofmann, A. "3D magnetic reconnection at an X-ray bright point" . Solar Physics, vol. 168, no. 1, 1996, pp. 115-133.
http://dx.doi.org/10.1007/BF00145829
---------- VANCOUVER ----------
Mandrini, C.H., Démoulin, P., Van Driel-Gesztelyi, L., Schmieder, B., Cauzzi, G., Hofmann, A. 3D magnetic reconnection at an X-ray bright point. Sol. Phys. 1996;168(1):115-133.
http://dx.doi.org/10.1007/BF00145829