Azimuthal Dust Polarization from Aerodynamically Aligned Grains as Evidence for the Streaming Instability in Protoplanetary Disks
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2026
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866908941272743936 |
|---|---|
| author | Lin, Zhe-Yu Daniel Lim, Jeonghoon Simon, Jacob B. Li, Zhi-Yun Carrera, Daniel Fernández-López, Manuel Harrison, Rachel Li, Rixin Looney, Leslie W. Stephens, Ian W. Yang, Haifeng |
| author_facet | Lin, Zhe-Yu Daniel Lim, Jeonghoon Simon, Jacob B. Li, Zhi-Yun Carrera, Daniel Fernández-López, Manuel Harrison, Rachel Li, Rixin Looney, Leslie W. Stephens, Ian W. Yang, Haifeng |
| contents | (Sub)millimeter dust polarization in protoplanetary disks has revealed the presence of large (~ 100 um) dust grains that are aligned along their long axis following the azimuthal direction of the disk. The novel Badminton Birdie-like Aerodynamic Alignment predicts large grains to align with their long axes following the direction of gas flow experienced by the dust, denoted as the A-field. With 3D streaming instability (SI) simulations, we find that the A-field is predominantly in the radial direction in regions of low dust-to-gas ratio, but in the azimuthal direction in regions of high dust-to-gas ratio. Through polarized radiation transfer, we find that the resulting polarization angle indeed follows the disk azimuthal direction in the high dust density regions. Therefore, the azimuthal dust polarization pattern, as observed in an increasing number of disks, especially at relatively long millimeter wavelengths, offers evidence of ongoing SI in protoplanetary disks. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_05122 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Azimuthal Dust Polarization from Aerodynamically Aligned Grains as Evidence for the Streaming Instability in Protoplanetary Disks Lin, Zhe-Yu Daniel Lim, Jeonghoon Simon, Jacob B. Li, Zhi-Yun Carrera, Daniel Fernández-López, Manuel Harrison, Rachel Li, Rixin Looney, Leslie W. Stephens, Ian W. Yang, Haifeng Earth and Planetary Astrophysics (Sub)millimeter dust polarization in protoplanetary disks has revealed the presence of large (~ 100 um) dust grains that are aligned along their long axis following the azimuthal direction of the disk. The novel Badminton Birdie-like Aerodynamic Alignment predicts large grains to align with their long axes following the direction of gas flow experienced by the dust, denoted as the A-field. With 3D streaming instability (SI) simulations, we find that the A-field is predominantly in the radial direction in regions of low dust-to-gas ratio, but in the azimuthal direction in regions of high dust-to-gas ratio. Through polarized radiation transfer, we find that the resulting polarization angle indeed follows the disk azimuthal direction in the high dust density regions. Therefore, the azimuthal dust polarization pattern, as observed in an increasing number of disks, especially at relatively long millimeter wavelengths, offers evidence of ongoing SI in protoplanetary disks. |
| title | Azimuthal Dust Polarization from Aerodynamically Aligned Grains as Evidence for the Streaming Instability in Protoplanetary Disks |
| topic | Earth and Planetary Astrophysics |
| url | https://arxiv.org/abs/2604.05122 |