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Quantum Suppression of Alignment in Ultrasmall Grains: Microwave Emission from Spinning Dust will be Negligibly Polarized

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TLDR
In this article, the quantization of energy levels in very nanoparticles suppresses dissipative processes that convert grain rotational kinetic energy into heat, and the suppression of dissipation can be extreme.
Abstract
The quantization of energy levels in very nanoparticles suppresses dissipative processes that convert grain rotational kinetic energy into heat. For grains small enough to have GHz rotation rates, the suppression of dissipation can be extreme. As a result, alignment of such grains is suppressed. This applies both to alignment of the grain body with its angular momentum J, and to alignment of J with the local magnetic field B_0. If the anomalous microwave emission is rotational emission from spinning grains, it will be negligibly polarized at GHz frequencies, with P < 10^{-6} at frequencies above 10 GHz.

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Journal ArticleDOI

Planck 2018 results: XI. Polarized dust foregrounds

Yashar Akrami, +183 more
TL;DR: In this paper, a power-law fit to the angular power spectra of dust polarization at 353 GHz for six nested sky regions covering from 24 to 71 % of the sky is presented.

Magnetic Dipole Microwave Emission from Dust Grains

TL;DR: In this article, the Kramers-Kronig relations for a dusty medium are generalized to include the possibility of magnetic grains, and the magnetic permeability as a function of frequency is discussed for several candidate grain materials.
Journal ArticleDOI

Exploring cosmic origins with CORE: B-mode component separation

Mathieu Remazeilles, +133 more
TL;DR: In this article, the CORE satellite mission was designed to detect the primordial cosmic microwave background (CMB) B-mode polarization with the desired accuracy at both reionization and recombination scales, for tensor-to-scalar ratio values of r.5×-10−3.
Journal ArticleDOI

Probing Cosmic Inflation with the LiteBIRD Cosmic Microwave Background Polarization Survey

LiteBIRD Collaboration E. Allys, +185 more
TL;DR: LiteBIRD as discussed by the authors , a satellite for the study of B-mode polarization and inflation from cosmic background radiation detection, is a space mission for primordial cosmology and fundamental physics, which is planned to orbit the Sun-Earth Lagrangian point L2, where it will map the cosmic microwave background (CMB) polarization over the entire sky for three years, with three telescopes in 15 frequency bands between 34 and 448 GHz, achieving an unprecedented total sensitivity of 2.2
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The State-of-Play of Anomalous Microwave Emission (AME) research

TL;DR: Anomalous microwave emission (AME) is a component of diffuse Galactic radiation observed at frequencies in the range of 10-60 GHz as discussed by the authors. But it cannot be explained by synchrotron or free-free emission mechanisms, and is far in excess of the emission contributed by thermal dust emission.
References
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Journal ArticleDOI

Interstellar Polycyclic Aromatic Hydrocarbon Molecules

TL;DR: In this paper, a review of the observed mid-IR spectral properties of polycyclic aromatic hydrocarbons (PAHs) is presented, emphasizing the contribution of these species to photoelectric heating and the ionization balance of the interstellar gas and to the formation of small hydrocarbon radicals and carbon chains.
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The Mid-Infrared Spectrum of Star-Forming Galaxies: Global Properties of PAH Emission

TL;DR: In this article, a sample of low-resolution 5-38um Spitzer IRS spectra of the inner few square kiloparsecs of 59 nearby galaxies spanning a large range of star formation properties is presented, and a robust method for decomposing mid-infrared galaxy spectra is described, and used to explore the behavior of PAH emission and the prevalence of silicate dust extinction.
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Infrared Emission from Interstellar Dust. I. Stochastic Heating of Small Grains

TL;DR: In this article, a method for calculating the infrared emission from a population of dust grains heated by starlight, including very small grains for which stochastic heating by star-light photons results in high temperature transients, is presented.
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