Microwave background signatures of a primordial stochastic magnetic field

Three-dimensional plasma simulations of interacting galactic-dimensioned current filaments show bursts of synchroton radiation of energy density 1·2 ×10−13 erg/cm3 which can be compared with the measured cosmic microwave background energy density of 1·5 × 10−13 erg/cm3. However, the synchrotron emission observed in the simulations is not blackbody. In this paper, we analyze the absorption of the synchrotron emission by the current filaments themselves (i.e., self-absorption) in order to investigate the thermalization of the emitted radiation. It is found that a large number of current filaments (>1031) are needed to make the radiation spectrum blackbody up to the observed measured frequency of 100 GHz. The radiation spectrum and the required number of current filaments is a strong function of the axial magnetic field in the filaments.

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Electron Heat Transport Measured in a Stochastic Magnetic Field

Physical Review Letters ◽

10.1103/physrevlett.91.045004 ◽

2003 ◽

Vol 91 (4) ◽

Cited By ~ 54

Author(s):

T. M. Biewer ◽

C. B. Forest ◽

J. K. Anderson ◽

G. Fiksel ◽

B. Hudson ◽

...

Keyword(s):

Magnetic Field ◽

Heat Transport ◽

Electron Heat ◽

Stochastic Magnetic Field

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Study on Electron Heat Diffusion Across Stochastic Magnetic Field Affected by Magnitude of Perturbed Magnetic Field in Tokomak

Journal of Fusion Energy ◽

10.1007/s10894-012-9551-3 ◽

2012 ◽

Vol 32 (2) ◽

pp. 203-207 ◽

Cited By ~ 2

Author(s):

Hong Gao

Keyword(s):

Magnetic Field ◽

Heat Diffusion ◽

Electron Heat ◽

Stochastic Magnetic Field ◽

Perturbed Magnetic Field

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Local Bubble contribution to the 353-GHz dust polarized emission

Astronomy and Astrophysics ◽

10.1051/0004-6361/201936547 ◽

2019 ◽

Vol 631 ◽

pp. L11 ◽

Cited By ~ 5

Author(s):

R. Skalidis ◽

V. Pelgrims

Keyword(s):

Magnetic Field ◽

Line Of Sight ◽

Optical Polarization ◽

Local Interstellar Medium ◽

Microwave Background ◽

Local Bubble ◽

Submillimeter Wavelengths ◽

Polarized Emission ◽

The Magnetic Field ◽

Robust Evidence

It has not been shown so far whether the diffuse Galactic polarized emission at frequencies relevant for cosmic microwave background (CMB) studies originates from nearby or more distant regions of our Galaxy. This questions previous attempts that have been made to constrain magnetic field models at local and large scales. The scope of this work is to investigate and quantify the contribution of the dusty and magnetized local interstellar medium to the observed emission that is polarized by thermal dust. We used stars as distance candles and probed the line-of-sight submillimeter polarization properties by comparing the emission that is polarized by thermal dust at submillimeter wavelengths and the optical polarization caused by starlight. We provide statistically robust evidence that at high Galactic latitudes (|b| ≥ 60°), the 353 GHz polarized sky as observed by Planck is dominated by a close-by magnetized structure that extends between 200 and 300 pc and coincides with the shell of the Local Bubble. Our result will assist modeling the magnetic field of the Local Bubble and characterizing the CMB Galactic foregrounds.

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