On Far-Infrared and Submm Circular Polarization

Abstract

Interstellar dust grains are often aligned. If the grain alignment direction varies along the line of sight, the thermal emission becomes circularly-polarized. In the diffuse interstellar medium, the circular polarization at far-infrared and submm wavelengths is predicted to be very small, and probably unmeasurable. However, circular polarization may reach detectable levels in infrared dark clouds and protoplanetary disks. Measurement of circular polarization could help constrain the structure of the magnetic field in infrared dark clouds, and may shed light on the mechanisms responsible for grain alignment in protoplanetary disks.

ApJ, accepted

References in corpus (15)

• Radiative torques: Analytical Model and Basic Properties
• Planck intermediate results. XIX. An overview of the polarized thermal emission from Galactic dust
• The evidence of radio polarization induced by the radiative grain alignment and self-scattering of dust grains in a protoplanetary disk
• ALMA Reveals Transition of Polarization Pattern with Wavelength in HL Tau's Disk
• Subsonic Mechanical Alignment of Irregular Grains
• Planck intermediate results. XXI. Comparison of polarized thermal emission from Galactic dust at 353 GHz with interstellar polarization in the visible
• Nonsticky Ice at the Origin of the Uniformly Polarized Submillimeter Emission from the HL Tau Disk
• What Produces Dust Polarization in the HH 212 Protostellar Disk at 878 μm: Dust Self-Scattering or Dichroic Extinction?
• Star formation in 'the Brick': ALMA reveals an active proto-cluster in the Galactic centre cloud G0.253+0.016
• Millimeter-wave polarization due to grain alignment by the gas flow in protoplanetary disks
• The Atacama Cosmology Telescope: Microwave Intensity and Polarization Maps of the Galactic Center
• Near-Infrared Circular Polarization Survey in Star-Forming Regions: Correlations and Trends
• Modeling of the ALMA HL Tau Polarization by Mixture of Grain Alignment and Self-scattering
• Size limit of superparamagnetic inclusions in dust grains and difficulty of magnetic grain alignment in protoplanetary disks
• High circular polarization of near infrared light induced by micron-size dust grains

Cited by in corpus (2)

• On Internal and External Alignment of Dust Grains in Protostellar Environments
• Generation of high circular polarization of interstellar Lyman $\alpha$ radiation triggering biological homochirality