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.

arXiv commentApJ, accepted

References in corpus (37)

• The Disk Substructures at High Angular Resolution Project (DSHARP): I. Motivation, Sample, Calibration, and Overview
• On the Submillimeter Opacity of Protoplanetary Disks
• Radial Flow of Dust Particles in Accretion Disks
• Radiative torques: Analytical Model and Basic Properties
• Planck intermediate results. XIX. An overview of the polarized thermal emission from Galactic dust
• Radiative Torques on Interstellar Grains: I. Superthermal Spinup
• Hi-GAL, the Herschel infrared Galactic Plane Survey: photometric maps and compact source catalogues. First data release for Inner Milky Way: +68°> l > -70°
• Radiative Torques on Interstellar Grains: II. Grain Alignment
• Millimeter-wave polarization of protoplanetary disks due to dust scattering
• Planck 2018 results. XII. Galactic astrophysics using polarized dust emission
• Radiative transfer with POLARIS: I. Analysis of magnetic fields through synthetic dust continuum polarization measurements
• G0.253+0.016: a molecular cloud progenitor of an Arches-like cluster
• 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
• Observational Constraints on the Physical Properties of Interstellar Dust in the Post-Planck Era
• Balloon-Borne Submillimeter Polarimetry of the Vela C Molecular Cloud: Systematic Dependence of Polarization Fraction on Column Density and Local Polarization-Angle Dispersion
• Subsonic Mechanical Alignment of Irregular Grains
• HAWC+/SOFIA Multiwavelength Polarimetric Observations of OMC-1
• 350 micron Polarimetry from the Caltech Submillimeter Observatory
• Planck intermediate results. XXI. Comparison of polarized thermal emission from Galactic dust at 353 GHz with interstellar polarization in the visible
• The Dielectric Function of "Astrodust" and Predictions for Polarization in the 3.4$\mu$m and 10$\mu$m Features
• Alignment of Irregular Grains by Mechanical Torques
• Nonsticky Ice at the Origin of the Uniformly Polarized Submillimeter Emission from the HL Tau Disk
• Radiative Torques on Interstellar Grains. III. Dynamics with Thermal Relaxation
• What Produces Dust Polarization in the HH 212 Protostellar Disk at 878 μm: Dust Self-Scattering or Dichroic Extinction?
• Does HL Tau Disk Polarization in ALMA Band 3 Come from Radiatively Aligned Grains?
• 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
• Using the Starlight Polarization Efficiency Integral to Constrain Shapes and Porosities of Interstellar Grains
• 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
• Alignment of interstellar grains by mechanical torques: suprathermally rotating Gaussian random spheres
• Evidence that widespread star formation may be underway in G0.253+016, "The Brick"
• 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
• Circular Polarimetry and the Line of Sight to the BN Object
• 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