English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  E and B Polarizations from Inhomogeneous and Solar Surface Turbulence

Brandenburg, A., Bracco, A., Kahniashvili, T., Mandal, S., Pol, A. R., Petrie, G. J. D., et al. (2019). E and B Polarizations from Inhomogeneous and Solar Surface Turbulence. The Astrophysical Journal, 870(2): 87. doi:10.3847/1538-4357/aaf383.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/21.11116/0000-0006-5B9E-3 Version Permalink: http://hdl.handle.net/21.11116/0000-0006-5B9F-2
Genre: Journal Article

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Brandenburg, Axel, Author
Bracco, Andrea, Author
Kahniashvili, Tina, Author
Mandal, Sayan, Author
Pol, Alberto Roper, Author
Petrie, Gordon J. D., Author
Singh, Nishant K.1, Author              
Affiliations:
1Max Planck Research Group in Solar and Stellar Magnetic Activity, Max Planck Institute for Solar System Research, Max Planck Society, ou_2265638              

Content

show
hide
Free keywords: -
 Abstract: Gradient- and curl-type or E- and B-type polarizations have been routinely analyzed to study the physics contributing to the cosmic microwave background polarization and galactic foregrounds. They characterize the parity-even and parity-odd properties of the underlying physical mechanisms, such as, for example, hydromagnetic turbulence in the case of dust polarization. Here, we study spectral correlation functions characterizing the parity-even and parity-odd parts of linear polarization for homogeneous and inhomogeneous turbulence to show that only the inhomogeneous helical case can give rise to a parity-odd polarization signal. We also study nonhelical turbulence and suggest that a strong non-vanishing (here negative) skewness of the E polarization is responsible for an enhanced ratio of the EE to the BB (quadratic) correlation in both the helical and nonhelical cases. This could explain the enhanced EE/BB ratio observed recently for dust polarization. We close with a preliminary assessment of using the linear polarization of the Sun to characterize its helical turbulence without being subjected to the π ambiguity that magnetic inversion techniques have to address.

Details

show
hide
Language(s): eng - English
 Dates: 2019
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.3847/1538-4357/aaf383
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: The Astrophysical Journal
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Bristol; Vienna : IOP Publishing; IAEA
Pages: 11 Volume / Issue: 870 (2) Sequence Number: 87 Start / End Page: - Identifier: ISSN: 0004-637X
CoNE: https://pure.mpg.de/cone/journals/resource/954922828215_3