The ULF wave foreshock boundary: Cluster observations

The interaction of backstreaming ions with the incoming solar wind in the upstream region of the bow shock gives rise to a number of plasma instabilities from which ultralow frequency (ULF) waves can grow. Because of their finite growth rate, the ULF waves are spatially localized in the foreshock re...

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Detalles Bibliográficos
Autores principales:	Andres, Nahuel, Bertucci, Cesar
Publicado:	2015
Materias:	Cluster spacecraft Earth's foreshock Interplanetary magnetic field Particle acceleration Solar wind ULF waves
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_21699380_v_n_p_Andres http://hdl.handle.net/20.500.12110/paper_21699380_v_n_p_Andres
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_21699380_v_n_p_Andres
record_format	dspace
spelling	paper:paper_21699380_v_n_p_Andres2023-06-08T16:34:51Z The ULF wave foreshock boundary: Cluster observations Andres, Nahuel Bertucci, Cesar Cluster spacecraft Earth's foreshock Interplanetary magnetic field Particle acceleration Solar wind ULF waves The interaction of backstreaming ions with the incoming solar wind in the upstream region of the bow shock gives rise to a number of plasma instabilities from which ultralow frequency (ULF) waves can grow. Because of their finite growth rate, the ULF waves are spatially localized in the foreshock region. Previous studies have reported observational evidence of the existence of a ULF wave foreshock boundary, whose geometrical characteristics are very sensitive to the interplanetary magnetic field (IMF) cone angle. The statistical properties of the ULF wave foreshock boundary (UWFB) are examined in detail using Cluster data. A new identification of the UWFB is presented using a specific and accurate criterion for identification of boundary crossings. This criterion is based on the degree of IMF rotation as Cluster crosses the boundary. The obtained UWFB is compared with previous results reported in the literature as well as with theoretical predictions. Also, we examined the possible connection between the foreshock boundary properties and the ion emission mechanisms at the bow shock. © 2015 American Geophysical Union. Fil:Andrés, N. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Bertucci, C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2015 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_21699380_v_n_p_Andres http://hdl.handle.net/20.500.12110/paper_21699380_v_n_p_Andres
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Cluster spacecraft Earth's foreshock Interplanetary magnetic field Particle acceleration Solar wind ULF waves
spellingShingle	Cluster spacecraft Earth's foreshock Interplanetary magnetic field Particle acceleration Solar wind ULF waves Andres, Nahuel Bertucci, Cesar The ULF wave foreshock boundary: Cluster observations
topic_facet	Cluster spacecraft Earth's foreshock Interplanetary magnetic field Particle acceleration Solar wind ULF waves
description	The interaction of backstreaming ions with the incoming solar wind in the upstream region of the bow shock gives rise to a number of plasma instabilities from which ultralow frequency (ULF) waves can grow. Because of their finite growth rate, the ULF waves are spatially localized in the foreshock region. Previous studies have reported observational evidence of the existence of a ULF wave foreshock boundary, whose geometrical characteristics are very sensitive to the interplanetary magnetic field (IMF) cone angle. The statistical properties of the ULF wave foreshock boundary (UWFB) are examined in detail using Cluster data. A new identification of the UWFB is presented using a specific and accurate criterion for identification of boundary crossings. This criterion is based on the degree of IMF rotation as Cluster crosses the boundary. The obtained UWFB is compared with previous results reported in the literature as well as with theoretical predictions. Also, we examined the possible connection between the foreshock boundary properties and the ion emission mechanisms at the bow shock. © 2015 American Geophysical Union.
author	Andres, Nahuel Bertucci, Cesar
author_facet	Andres, Nahuel Bertucci, Cesar
author_sort	Andres, Nahuel
title	The ULF wave foreshock boundary: Cluster observations
title_short	The ULF wave foreshock boundary: Cluster observations
title_full	The ULF wave foreshock boundary: Cluster observations
title_fullStr	The ULF wave foreshock boundary: Cluster observations
title_full_unstemmed	The ULF wave foreshock boundary: Cluster observations
title_sort	ulf wave foreshock boundary: cluster observations
publishDate	2015
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_21699380_v_n_p_Andres http://hdl.handle.net/20.500.12110/paper_21699380_v_n_p_Andres
work_keys_str_mv	AT andresnahuel theulfwaveforeshockboundaryclusterobservations AT bertuccicesar theulfwaveforeshockboundaryclusterobservations AT andresnahuel ulfwaveforeshockboundaryclusterobservations AT bertuccicesar ulfwaveforeshockboundaryclusterobservations
_version_	1768544155073511424

The ULF wave foreshock boundary: Cluster observations

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