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Cluster Hot Flow Anomaly Observations During Solar Cycle Minimum

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Book cover The Cluster Active Archive

Part of the book series: Astrophysics and Space Science Proceedings ((ASSSP))

Abstract

Hot flow anomalies (HFAs) are studied using observations of the FGM magnetometer and the CIS plasma detector aboard the four Cluster spacecraft. Previously we studied several specific features of tangential discontinuities on the basis of Cluster measurements in February–April 2003 and discovered a new condition for forming HFAs that is the solar wind speed is higher than the average. However during the whole spring season of 2003, the solar wind speed was higher than average. In this study we analyse HFAs detected in 2007, the year of solar cycle minimum. Our earlier result was confirmed: the higher solar wind speed is a real condition for HFA formation; furthermore this constraint is independent of Schwartz et al.’s condition for HFA formation.

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Acknowledgements

The authors thank the OTKA grant K75640 of the Hungarian Scientific Research Fund for support and the Cluster FGM, CIS and ACE MAG, SWEPAM teams for providing data for this study.

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Authors and Affiliations

  1. KFKI Research Institute for Particle and Nuclear Physics, H-1525, Budapest, 49, Hungary

    G. Facskó, M. Tátrallyay & G. Erdős

  2. CESR, 9, Avenue du Colonel ROCHE, 31028, TOULOUSE CEDEX 4, France

    I. Dandouras

Authors
  1. G. Facskó
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  2. M. Tátrallyay
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  3. G. Erdős
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  4. I. Dandouras
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Corresponding author

Correspondence to G. Facskó .

Editor information

Editors and Affiliations

  1. European Space Research &, European Space Agency, Keplerlaan 1, Noordwijk, 2200 AG, Netherlands

    Harri Laakso

  2. ESTEC/SRE-S, European Space Agency, Noordwijk, 2200 AG, Netherlands

    Matthew Taylor

  3. ESTEC/SRE-S, European Space Agency, Noordwijk, 2200 AG, Netherlands

    C. Philippe Escoubet

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Facskó, G., Tátrallyay, M., Erdős, G., Dandouras, I. (2010). Cluster Hot Flow Anomaly Observations During Solar Cycle Minimum. In: Laakso, H., Taylor, M., Escoubet, C. (eds) The Cluster Active Archive. Astrophysics and Space Science Proceedings. Springer, Dordrecht. https://doi.org/10.1007/978-90-481-3499-1_25

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  • DOI: https://doi.org/10.1007/978-90-481-3499-1_25

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  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-90-481-3498-4

  • Online ISBN: 978-90-481-3499-1

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