首页|Application of novel interplanetary scintillation visualisations using LOFAR: A case study of merged CMEs from September 2017

Application of novel interplanetary scintillation visualisations using LOFAR: A case study of merged CMEs from September 2017

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  • Elsevier
Observations of interplanetary scintillation (IPS - the scintillation of compact radio sources due to density variations in the solar wind) enable the velocity of the solar wind to be determined, and its bulk density to be estimated, throughout the inner heliosphere. A series of observations using the Low Frequency Array (LOFAR - a radio telescope centred on the Netherlands with stations across Europe) were undertaken using this technique to observe the passage of an ultra-fast CME which launched from the Sun following the X-class flare of 10 September 2017. LOFAR observed the strong radio source 3C147 at an elongation of 82 degrees from the Sun over a period of more than 30 h and observed a strong increase in speed to 900 km s~(-1) followed two hours later by a strong increase in the level of scintillation, interpreted as a strong increase in density. Both speed and density remained enhanced for a period of more than seven hours, to beyond the period of observation. Further analysis of these data demonstrates a view of magnetic-field rotation due to the passage of the CME, using advanced IPS techniques only available to a unique instrument such as LOFAR.

Interplanetary scintillationCoronal mass ejectionSolar wind

R.A. Fallows、K. Iwai、B.V. Jackson、P. Zhang、M.M. Bisi、P. Zucca

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ASTRON - the Netherlands Institute for Radio Astronomy, Oude Hoogeveensedijk 4, 7991 PD Dwingeloo, the Netherlands||RAL Space, United Kingdom Research and Innovation - Science & Technology Facilities Council - Rutherford Appleton Laboratory, Harwell Campus, Oxfordshire OX11 0QX, UK

Institute for Space-Earth Environmental Research, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan

Center for Astrophysics and Space Sciences, University of California, San Diego, LaJolla, CA 92093-0424, USA

Institute of Astronomy and National Astronomical Observatory, Bulgarian Academy of Sciences, Sofia 1784, Bulgaria||ASTRON - the Netherlands Institute for Radio Astronomy, Oude Hoogeveensedijk 4, 7991 PD Dwingeloo, the Netherlands

RAL Space, United Kingdom Research and Innovation - Science & Technology Facilities Council - Rutherford Appleton Laboratory, Harwell Campus, Oxfordshire OX11 0QX, UK

ASTRON - the Netherlands Institute for Radio Astronomy, Oude Hoogeveensedijk 4, 7991 PD Dwingeloo, the Netherlands

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2023

10.1016/j.asr.2022.08.076

Advances in space research: The official journal of the Committee on Space Research

Advances in space research: The official journal of the Committee on Space Research

EI
ISSN：0273-1177
年,卷(期)：2023.72(12)
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