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Compensating Farada...
Compensating Faraday Depolarization by Magnetic Helicity in the Solar Corona
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- Brandenburg, Axel (författare)
- Stockholms universitet,KTH,Nordic Institute for Theoretical Physics NORDITA,Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, CO 80303, USA; Department of Astrophysical and Planetary Sciences, University of Colorado, Boulder, CO 80303, USA; Department of Astronomy, AlbaNova University Center, Stockholm University, SE-10691 Stockholm, Sweden,Institutionen för astronomi,Nordiska institutet för teoretisk fysik (Nordita)
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Ashurova, Mohira B. (författare)
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Jabbari, Sarah (författare)
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(creator_code:org_t)
- 2017-08-17
- 2017
- Engelska.
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Ingår i: Astrophysical Journal Letters. - : IOP PUBLISHING LTD. - 2041-8205 .- 2041-8213. ; 845:2
- Relaterad länk:
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https://iopscience.i...
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visa fler...
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https://urn.kb.se/re...
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https://doi.org/10.3...
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https://urn.kb.se/re...
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visa färre...
Abstract
Ämnesord
Stäng
- A turbulent dynamo in spherical geometry with an outer corona is simulated to study the sign of magnetic helicity in the outer parts. In agreement with earlier studies, the sign in the outer corona is found to be opposite to that inside the dynamo. Line-of-sight observations of polarized emission are synthesized to explore the feasibility of using the local reduction of Faraday depolarization to infer the sign of helicity of magnetic fields in the solar corona. This approach was previously identified as an observational diagnostic in the context of galactic magnetic fields. Based on our simulations, we show that this method can be successful in the solar context if sufficient statistics are gathered by using averages over ring segments in the corona separately for the regions north and south of the solar equator.
Ämnesord
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Nyckelord
- dynamo
- magnetohydrodynamics (MHD)
- Sun: magnetic fields
- turbulence
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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