Locating the solar source of 13 April 2006 magnetic cloud

Mostrar todas las versiones(3)

Using Advanced Composition Explorer (ACE) in situ data we identify and describe an interplanetary magnetic cloud (MC) observed near Earth on 13 April 2006. We also use multi-instrument and multi-wavelength observations from the Solar and Heliospheric Observatory (SOHO), the Transition Region and Cor...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Steed, K., Owen, C.J., Harra, L.K., Green, L.M., Dasso, S., Walsh, A.P., Démoulin, P., Van Driel-Gesztelyi, L.
Formato: Artículo publishedVersion
Publicado: 2008
Materias:
Earth
magnetic field
spacecraft
wavelength
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_09927689_v26_n10_p3159_Steed
https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_09927689_v26_n10_p3159_Steed_oai
Aporte de:
Repositorio Digital de la Universidad de Buenos Aires (UBA) de Universidad de Buenos Aires
id I28-R145-paper_09927689_v26_n10_p3159_Steed_oai
record_format dspace
spelling I28-R145-paper_09927689_v26_n10_p3159_Steed_oai2024-08-16 Steed, K. Owen, C.J. Harra, L.K. Green, L.M. Dasso, S. Walsh, A.P. Démoulin, P. Van Driel-Gesztelyi, L. 2008 Using Advanced Composition Explorer (ACE) in situ data we identify and describe an interplanetary magnetic cloud (MC) observed near Earth on 13 April 2006. We also use multi-instrument and multi-wavelength observations from the Solar and Heliospheric Observatory (SOHO), the Transition Region and Coronal Explorer (TRACE) and ground-based solar observatories to determine the solar source of this magnetic cloud. A launch window for the MC between 9 and 11 April 2006 was estimated from the propagation time of the ejecta observed near Earth. A number of large active regions (ARs) were present on the Sun during this period, which were initially considered to be the most likely candidate source regions of the MC. However, it was determined that the solar source of the MC was a small, spotless active region observed in the Northern Hemisphere. Following an eruption from this region on 11 April 2006, the ACE spacecraft detected, 59 h later, the passage of the MC, preceded by the arrival of a weak, forward fast shock. The link between the eruption in this active region and the interplanetary MC is supported by several pieces of evidence, including the location of the solar source near to the disk centre and to the east of the central meridian (in agreement with the spacecraft trajectory through the western leg of the magnetic cloud), the propagation time of the ejecta, the agreement between the amount of flux in the magnetic cloud and in the active region, and the agreement between the signs of helicity of the magnetic cloud and the active region (which differs from the sign of helicity of each of the other active regions on the Sun at this time). In addition, the active region is located on the boundary of a coronal hole, and a high speed solar wind stream originating from this region is observed near Earth shortly after the passage of the magnetic cloud. Fil:Dasso, S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. application/pdf http://hdl.handle.net/20.500.12110/paper_09927689_v26_n10_p3159_Steed info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar Ann. Geophys. 2008;26(10):3159-3168 Earth magnetic field spacecraft wavelength Locating the solar source of 13 April 2006 magnetic cloud info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_09927689_v26_n10_p3159_Steed_oai
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-145
collection Repositorio Digital de la Universidad de Buenos Aires (UBA)
topic Earth
magnetic field
spacecraft
wavelength
spellingShingle Earth
magnetic field
spacecraft
wavelength
Steed, K.
Owen, C.J.
Harra, L.K.
Green, L.M.
Dasso, S.
Walsh, A.P.
Démoulin, P.
Van Driel-Gesztelyi, L.
Locating the solar source of 13 April 2006 magnetic cloud
topic_facet Earth
magnetic field
spacecraft
wavelength
description Using Advanced Composition Explorer (ACE) in situ data we identify and describe an interplanetary magnetic cloud (MC) observed near Earth on 13 April 2006. We also use multi-instrument and multi-wavelength observations from the Solar and Heliospheric Observatory (SOHO), the Transition Region and Coronal Explorer (TRACE) and ground-based solar observatories to determine the solar source of this magnetic cloud. A launch window for the MC between 9 and 11 April 2006 was estimated from the propagation time of the ejecta observed near Earth. A number of large active regions (ARs) were present on the Sun during this period, which were initially considered to be the most likely candidate source regions of the MC. However, it was determined that the solar source of the MC was a small, spotless active region observed in the Northern Hemisphere. Following an eruption from this region on 11 April 2006, the ACE spacecraft detected, 59 h later, the passage of the MC, preceded by the arrival of a weak, forward fast shock. The link between the eruption in this active region and the interplanetary MC is supported by several pieces of evidence, including the location of the solar source near to the disk centre and to the east of the central meridian (in agreement with the spacecraft trajectory through the western leg of the magnetic cloud), the propagation time of the ejecta, the agreement between the amount of flux in the magnetic cloud and in the active region, and the agreement between the signs of helicity of the magnetic cloud and the active region (which differs from the sign of helicity of each of the other active regions on the Sun at this time). In addition, the active region is located on the boundary of a coronal hole, and a high speed solar wind stream originating from this region is observed near Earth shortly after the passage of the magnetic cloud.
format Artículo
Artículo
publishedVersion
author Steed, K.
Owen, C.J.
Harra, L.K.
Green, L.M.
Dasso, S.
Walsh, A.P.
Démoulin, P.
Van Driel-Gesztelyi, L.
author_facet Steed, K.
Owen, C.J.
Harra, L.K.
Green, L.M.
Dasso, S.
Walsh, A.P.
Démoulin, P.
Van Driel-Gesztelyi, L.
author_sort Steed, K.
title Locating the solar source of 13 April 2006 magnetic cloud
title_short Locating the solar source of 13 April 2006 magnetic cloud
title_full Locating the solar source of 13 April 2006 magnetic cloud
title_fullStr Locating the solar source of 13 April 2006 magnetic cloud
title_full_unstemmed Locating the solar source of 13 April 2006 magnetic cloud
title_sort locating the solar source of 13 april 2006 magnetic cloud
publishDate 2008
url http://hdl.handle.net/20.500.12110/paper_09927689_v26_n10_p3159_Steed
https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_09927689_v26_n10_p3159_Steed_oai
work_keys_str_mv AT steedk locatingthesolarsourceof13april2006magneticcloud
AT owencj locatingthesolarsourceof13april2006magneticcloud
AT harralk locatingthesolarsourceof13april2006magneticcloud
AT greenlm locatingthesolarsourceof13april2006magneticcloud
AT dassos locatingthesolarsourceof13april2006magneticcloud
AT walshap locatingthesolarsourceof13april2006magneticcloud
AT demoulinp locatingthesolarsourceof13april2006magneticcloud
AT vandrielgesztelyil locatingthesolarsourceof13april2006magneticcloud
_version_ 1809357011144409088

Ejemplares similares