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http://purl.org/net/epubs/work/31656864
Record Status
Checked
Record Id
31656864
Title
Separating Nightside Interplanetary and Ionospheric Scintillation with LOFAR
Contributors
RA Fallows
,
MM Bisi
,
B Forte
,
T Ulich
,
AA Konovalenko
,
G Mann
,
C Vocks
Abstract
Observation of interplanetary scintillation (IPS) beyond Earth-orbit can be challenging due to the necessity to use low radio frequencies at which scintillation due to the ionosphere could confuse the interplanetary contribution. A recent paper by Kaplan et al. presenting observations using the Murchison Widefield Array (MWA) reports evidence of nightside IPS on two radio sources within their field of view. However, the low time cadence of 2 s used might be expected to average out the IPS signal, resulting in the reasonable assumption that the scintillation is more likely to be ionospheric in origin. To check this assumption, this Letter uses observations of IPS taken at a high time cadence using the Low Frequency Array (LOFAR). Averaging these to the same as the MWA observations, we demonstrate that the MWA result is consistent with IPS, although some contribution from the ionosphere cannot be ruled out. These LOFAR observations represent the first of nightside IPS using LOFAR, with solar wind speeds consistent with a slow solar wind stream in one observation and a coronal mass ejection expected to be observed in another.
Organisation
STFC
,
RALSP
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Language
English (EN)
Type
Details
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Year
Journal Article
Astrophys J Lett
828, no. 1 (2016): L7.
http://iopscienceā¦1-8205/828/1/L7/meta
2016
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