Resolving Moving Heliospheric Structures Using Interplanetary Scintillation Observations With the Murchison Widefield Array Article Swipe
A. Waszewski
,
John Morgan
,
Rajan Chhetri
,
R. D. Ekers
,
Mark C. M. Cheung
,
N. D. R. Bhat
,
M. Johnston‐Hollitt
·
YOU?
·
· 2023
· Open Access
·
· DOI: https://doi.org/10.1029/2023sw003570
YOU?
·
· 2023
· Open Access
·
· DOI: https://doi.org/10.1029/2023sw003570
We have conducted a blind search in 49 consecutive days of interplanetary scintillation observations made by the Murchison Widefield Array from mid‐2019, with overlapping daily observations approximately East and South‐East of the Sun at an elongation of ∼30° and a field of view of 30°. These observations detect an unprecedented density of sources. In spite of these observations being taken at sunspot minimum, this search has revealed several interesting transitory features characterized by elevated scintillation levels. One solar wind enhancement is captured in two observations several hours apart, allowing its radial movement away from the Sun to be measured. We present here a methodology for measuring the plane‐of‐sky velocity for the moving heliospheric structure. The plane‐of‐sky velocity was inferred as 0.66 ± 0.147 hr −1 , or 480 ± 106 kms −1 assuming a distance of 1AU. After cross‐referencing our observed structure with multiple catalogs of heliospheric events, we propose that the likely source of our observed structure is a stream‐interaction region originating from a low‐latitude coronal hole. This work demonstrates the power of widefield interplanetary scintillation observations to capture detailed features in the heliosphere which are otherwise unresolvable and go undetected.
Related Topics
Concepts
Interplanetary scintillation
Physics
Heliosphere
Scintillation
Sky
Solar wind
Coronal mass ejection
Interplanetary spaceflight
Interplanetary medium
Astronomy
Astrophysics
Optics
Magnetic field
Detector
Quantum mechanics
Metadata
- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.1029/2023sw003570
- https://onlinelibrary.wiley.com/doi/pdfdirect/10.1029/2023SW003570
- OA Status
- diamond
- Cited By
- 1
- References
- 52
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W4387336080
All OpenAlex metadata
Raw OpenAlex JSON
- OpenAlex ID
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https://openalex.org/W4387336080Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.1029/2023sw003570Digital Object Identifier
- Title
-
Resolving Moving Heliospheric Structures Using Interplanetary Scintillation Observations With the Murchison Widefield ArrayWork title
- Type
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articleOpenAlex work type
- Language
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enPrimary language
- Publication year
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2023Year of publication
- Publication date
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2023-10-01Full publication date if available
- Authors
-
A. Waszewski, John Morgan, Rajan Chhetri, R. D. Ekers, Mark C. M. Cheung, N. D. R. Bhat, M. Johnston‐HollittList of authors in order
- Landing page
-
https://doi.org/10.1029/2023sw003570Publisher landing page
- PDF URL
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https://onlinelibrary.wiley.com/doi/pdfdirect/10.1029/2023SW003570Direct link to full text PDF
- Open access
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YesWhether a free full text is available
- OA status
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diamondOpen access status per OpenAlex
- OA URL
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https://onlinelibrary.wiley.com/doi/pdfdirect/10.1029/2023SW003570Direct OA link when available
- Concepts
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Interplanetary scintillation, Physics, Heliosphere, Scintillation, Sky, Solar wind, Coronal mass ejection, Interplanetary spaceflight, Interplanetary medium, Astronomy, Astrophysics, Optics, Magnetic field, Detector, Quantum mechanicsTop concepts (fields/topics) attached by OpenAlex
- Cited by
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1Total citation count in OpenAlex
- Citations by year (recent)
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2025: 1Per-year citation counts (last 5 years)
- References (count)
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52Number of works referenced by this work
- Related works (count)
-
10Other works algorithmically related by OpenAlex
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