The ULF wave foreshock boundary: Cluster observations

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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: Andrés, N., Meziane, K., Mazelle, C., Bertucci, C., Gõmez, D.
Formato: JOUR
Materias:
Cluster spacecraft
Earth's foreshock
interplanetary magnetic field
particle acceleration
solar wind
ULF waves
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_21699380_v120_n6_p4181_Andres
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_21699380_v120_n6_p4181_Andres
record_format dspace
spelling todo:paper_21699380_v120_n6_p4181_Andres2023-10-03T16:40:01Z The ULF wave foreshock boundary: Cluster observations Andrés, N. Meziane, K. Mazelle, C. Bertucci, C. Gõmez, D. 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. Key Points A new determination of the boundary for ULF waves in the Earth foreshock A specific, accurate, and robust criterion for crossings determination is present The boundary is compared with previous results and theoretical predictions ©2015. American Geophysical Union. All Rights Reserved. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_21699380_v120_n6_p4181_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
Andrés, N.
Meziane, K.
Mazelle, C.
Bertucci, C.
Gõmez, D.
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. Key Points A new determination of the boundary for ULF waves in the Earth foreshock A specific, accurate, and robust criterion for crossings determination is present The boundary is compared with previous results and theoretical predictions ©2015. American Geophysical Union. All Rights Reserved.
format JOUR
author Andrés, N.
Meziane, K.
Mazelle, C.
Bertucci, C.
Gõmez, D.
author_facet Andrés, N.
Meziane, K.
Mazelle, C.
Bertucci, C.
Gõmez, D.
author_sort Andrés, N.
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
url http://hdl.handle.net/20.500.12110/paper_21699380_v120_n6_p4181_Andres
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AT bertuccic theulfwaveforeshockboundaryclusterobservations
AT gomezd theulfwaveforeshockboundaryclusterobservations
AT andresn ulfwaveforeshockboundaryclusterobservations
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