Navegar

Colección

Datos Estadísticas

Artículo

Huang, Z.; Frazin, R.A.; Landi, E.; Manchester, W.B.; Vásquez, A.M.; Gombosi, T.I. "Newly discovered global temperature structures in the quiet sun at solar minimum" (2012) Astrophysical Journal. 755(2)
Estamos trabajando para incorporar este artículo al repositorio
Consulte el artículo en la página del editor
Consulte la política de Acceso Abierto del editor

Abstract:

Magnetic loops are building blocks of the closed-field corona. While active region loops are readily seen in images taken at EUV and X-ray wavelengths, quiet-Sun (QS) loops are seldom identifiable and are therefore difficult to study on an individual basis. The first analysis of solar minimum (Carrington Rotation 2077) QS coronal loops utilizing a novel technique called the Michigan Loop Diagnostic Technique (MLDT) is presented. This technique combines Differential Emission Measure Tomography and a potential field source surface (PFSS) model, and consists of tracing PFSS field lines through the tomographic grid on which the local differential emission measure is determined. As a result, the electron temperature Te and density Ne at each point along each individual field line can be obtained. Using data from STEREO/EUVI and SOHO/MDI, the MLDT identifies two types of QS loops in the corona: so-called up loops in which the temperature increases with height and so-called down loops in which the temperature decreases with height. Up loops are expected, however, down loops are a surprise, and furthermore, they are ubiquitous in the low-latitude corona. Up loops dominate the QS at higher latitudes. The MLDT allows independent determination of the empirical pressure and density scale heights, and the differences between the two remain to be explained. The down loops appear to be a newly discovered property of the solar minimum corona that may shed light on the physics of coronal heating. The results are shown to be robust to the calibration uncertainties of the EUVI instrument. © © 2012. The American Astronomical Society. All rights reserved..

Registro:

Documento: Artículo
Título:Newly discovered global temperature structures in the quiet sun at solar minimum
Autor:Huang, Z.; Frazin, R.A.; Landi, E.; Manchester, W.B.; Vásquez, A.M.; Gombosi, T.I.
Filiación:Department of Atmospheric, Oceanic and Space Sciences, University of Michigan, Ann Arbor, MI 48109, United States
Instituto de Astronomía y Física Del Espacio, CONICET-University of Buenos Aires, Ciudad de Buenos Aires CC 67-Suc 28, Argentina
Palabras clave:Sun: corona; Sun: magnetic topology; Sun: UV radiation
Año:2012
Volumen:755
Número:2
DOI: http://dx.doi.org/10.1088/0004-637X/755/2/86
Título revista:Astrophysical Journal
Título revista abreviado:Astrophys. J.
ISSN:0004637X
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0004637X_v755_n2_p_Huang

Referencias:

  • Antiochos, S.K., Mikić, Z., Titov, V.S., Lionello, R., Linker, J.A., (2011) ApJ, 731 (2), p. 112. , 10.1088/0004-637X/731/2/112 0004-637X 112
  • Aschwanden, M.J., Boerner, P., (2011) ApJ, 732 (2), p. 81. , 10.1088/0004-637X/732/2/81 0004-637X 81
  • Aschwanden, M.J., Boerner, P., Schrijver, C.J., Malanushenko, A., (2011) Sol.Phys., p. 384. , 10.1007/s11207-011-9876-5
  • Aschwanden, M.J., Schrijver, C.J., Analytical approximations to hydrostatic solutions and scaling laws of coronal loops (2002) Astrophysical Journal, Supplement Series, 142 (2), pp. 269-283. , DOI 10.1086/341945
  • Barbey, N., Guennou, C., Auchère, F., (2011) Sol.Phys., p. 181. , 10.1007/s11207-011-9792-8
  • Butala, M.D., Hewett, R.J., Frazin, R.A., Kamalabadi, F., (2010) Sol.Phys., 262, p. 495. , 10.1007/s11207-010-9536-1
  • Craig, I.J.D., Brown, J.C., (1976) A&A, 49, p. 239. , 0004-6361
  • Dere, K.P., Landi, E., Mason, H.E., Monsignori Fossi, B.C., Young, P.R., (1997) A&AS, 125 (1), p. 149. , 10.1051/aas:1997368 0365-0138
  • Dere, K.P., Landi, E., Young, P.R., (2009) A&A, 498, p. 915. , 10.1051/0004-6361/200911712 0004-6361
  • Feldman, U., Doschek, G.A., Schühle, U., Wilhelm, K., (1999) ApJ, 518 (1), p. 500. , 10.1086/307252 0004-637X 500
  • Feldman, U., Landi, E., The temperature structure of solar coronal plasmas (2008) Physics of Plasmas, 15 (5), p. 056501. , DOI 10.1063/1.2837044
  • Feldman, U., Landi, E., Schwadron, N.A., On the sources of fast and slow solar wind (2005) Journal of Geophysical Research A: Space Physics, 110 (A7), pp. A07109. , DOI 10.1029/2004JA010918
  • Fisk, L.A., Zurbuchen, T.H., Schwadron, N.A., (1999) SpaceSci.Rev., 87, p. 43. , 10.1023/A:1005153730158
  • Frazin, R.A., Janzen, P., Tomography of the solar corona. II. Robust, regularized, positive estimation of the three-dimensional electron density distribution from LASCO-C2 polarized white-light images (2002) Astrophysical Journal, 570 (1), pp. 408-422. , DOI 10.1086/339572
  • Frazin, R.A., Kamalabadi, F., Weber, M.A., On the combination of differential emission measure analysis and rotational tomography for three-dimensional solar EUV imaging (2005) Astrophysical Journal, 628 (2), pp. 1070-1080. , DOI 10.1086/431295
  • Frazin, R.A., Vásquez, A.M., Kamalabadi, F., (2009) ApJ, 701 (1), p. 547. , 10.1088/0004-637X/701/1/547 0004-637X 547
  • Howard, R.A., Moses, J.D., Vourlidas, A., (2008) SpaceSci.Rev., 136, p. 67. , 10.1007/s11214-008-9341-4
  • Kohl, J.L., Esser, R., Gardner, L.D., (1995) Sol.Phys., 162, p. 313. , 10.1007/BF00733433
  • Landi, E., Feldman, U., Dere, K.P., CHIANTI - An atomic database for emission lines. V. Comparison with an isothermal spectrum observed with sumer (2002) Astrophysical Journal, Supplement Series, 139 (1), pp. 281-296. , DOI 10.1086/337949
  • Pasachoff, J.M., Rušin, V., Saniga, M., Druckmüllerová, H., Babcock, B.A., (2011) ApJ, 742 (1), p. 29. , 10.1088/0004-637X/742/1/29 0004-637X 29
  • Patsourakos, S., Klimchuk, J.A., Coronal loop heating by nanoflares: The impact of the field-aligned distribution of the heating on loop observations (2005) Astrophysical Journal, 628 (2), pp. 1023-1030. , DOI 10.1086/430662
  • Raymond, J.C., Kohl, J.L., Noci, G., Antonucci, E., Tondello, G., Huber, M.C.E., Gardner, L.D., Romoli, M., Composition of Coronal Streamers from the SOHO Ultraviolet Coronagraph spectrometer (1997) Solar Physics, 175 (2), pp. 645-665. , DOI 10.1023/A:1004948423169
  • Reale, F., Guarrasi, M., Testa, P., (2011) ApJ, 736 (1), pp. L16. , 10.1088/2041-8205/736/1/L16 2041-8205 L16
  • Schrijver, C.J., Sandman, A.W., Aschwanden, M.J., Derosa, M.L., The coronal heating mechanism as identified by full-sun visualizations (2004) Astrophysical Journal, 615 (1), pp. 512-525. , DOI 10.1086/424028
  • Schrijver, C.J., Van Den Oord, G.H.J., Mewe, R., (1994) A&A, 289, pp. L23. , 0004-6361
  • Serio, S., Peres, G., Vaiana, G.S., Golub, L., Rosner, R., (1981) ApJ, 243, p. 288. , 10.1086/158597
  • Tóth, G., Van Der Holst, B., Huang, Z., (2011) ApJ, 732 (2), p. 102. , 10.1088/0004-637X/732/2/102 0004-637X 102
  • Tripathi, D., Mason, H.E., Dwivedi, B.N., Del Zanna, G., Young, P.R., (2009) ApJ, 694 (2), p. 1256. , 10.1088/0004-637X/694/2/1256 0004-637X 1256
  • Vaiana, G.S., Davis, J.M., Giacconi, R., (1973) ApJ, 185, pp. L47. , 10.1086/181318
  • Vásquez, A.M., Huang, Z., Manchester, W.B., Frazin, R.A., (2011) Sol.Phys., p. 16. , 10.1007/s11207-010-9706-1
  • Viall, N.M., Klimchuk, J.A., (2011) ApJ, 738 (1), p. 24. , 10.1088/0004-637X/738/1/24 0004-637X 24
  • Wang, Y.-M., Sheeley, N.R., Walters, J.H., Brueckner, G.E., Howard, R.A., Michels, D.J., Lamy, P.L., Simnett, G.M., Origin of Streamer Material in the Outer Corona (1998) Astrophysical Journal, 498 (2), pp. L165-L168. , DOI 10.1086/311321
  • Warren, H.P., (1999) Sol.Phys., 190, p. 363. , 10.1023/A:1005289726676
  • Warren, H.P., Winebarger, A.R., Brooks, D.H., (2010) ApJ, 711 (1), p. 228. , 10.1088/0004-637X/711/1/228 0004-637X 228
  • Winebarger, A.R., Schmelz, J.T., Warren, H.P., Saar, S.H., Kashyap, V.L., (2011) ApJ, 740 (1), p. 2. , 10.1088/0004-637X/740/1/2 0004-637X 2

Citas:

---------- APA ----------
Huang, Z., Frazin, R.A., Landi, E., Manchester, W.B., Vásquez, A.M. & Gombosi, T.I. (2012) . Newly discovered global temperature structures in the quiet sun at solar minimum. Astrophysical Journal, 755(2).
http://dx.doi.org/10.1088/0004-637X/755/2/86
---------- CHICAGO ----------
Huang, Z., Frazin, R.A., Landi, E., Manchester, W.B., Vásquez, A.M., Gombosi, T.I. "Newly discovered global temperature structures in the quiet sun at solar minimum" . Astrophysical Journal 755, no. 2 (2012).
http://dx.doi.org/10.1088/0004-637X/755/2/86
---------- MLA ----------
Huang, Z., Frazin, R.A., Landi, E., Manchester, W.B., Vásquez, A.M., Gombosi, T.I. "Newly discovered global temperature structures in the quiet sun at solar minimum" . Astrophysical Journal, vol. 755, no. 2, 2012.
http://dx.doi.org/10.1088/0004-637X/755/2/86
---------- VANCOUVER ----------
Huang, Z., Frazin, R.A., Landi, E., Manchester, W.B., Vásquez, A.M., Gombosi, T.I. Newly discovered global temperature structures in the quiet sun at solar minimum. Astrophys. J. 2012;755(2).
http://dx.doi.org/10.1088/0004-637X/755/2/86