ABSTRACT A number of young circumstellar discs show strikingly ordered (sub)millimetre polarization orientations along the minor axis, which is strong evidence for polarization due to scattering by ∼0.1 mm-sized grains. To test this mechanism further, we model the ALMA dust continuum and polarization data of HD 163296 using radmc-3d. We find that scattering by grains with a maximum size of 90 μm simultaneously reproduces the polarization observed at Band 7 and the unusually low spectral index (α ∼ 1.5) between Bands 7 and 6 in the optically thick inner disc as a result of more efficient scattering at the shorter wavelength.more »
Polarization-Dependent Theory of Two-Wave Mixing in Nonlinear Media, and Application to Dynamical Polarization Control
- Award ID(s):
- 1803874
- Publication Date:
- NSF-PAR ID:
- 10165818
- Journal Name:
- Physical Review X
- Volume:
- 10
- Issue:
- 2
- ISSN:
- 2160-3308
- Sponsoring Org:
- National Science Foundation