A Dust-Trapping Ring in the Planet-Hosting Disk of Elias 2-24
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| Natura: | Preprint |
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2024
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| author | Carvalho, Adolfo S. Perez, Laura M. Sierra, Anibal Mellado, Maria Jesus Hillenbrand, Lynne A. Andrews, Sean Benisty, Myriam Birnstiel, Tilman Carpenter, John M. Guzman, Viviana V. Huang, Jane Isella, Andrea Kurtovic, Nicolas Ricci, Luca Wilner, David J. |
| author_facet | Carvalho, Adolfo S. Perez, Laura M. Sierra, Anibal Mellado, Maria Jesus Hillenbrand, Lynne A. Andrews, Sean Benisty, Myriam Birnstiel, Tilman Carpenter, John M. Guzman, Viviana V. Huang, Jane Isella, Andrea Kurtovic, Nicolas Ricci, Luca Wilner, David J. |
| contents | Rings and gaps are among the most widely observed forms of substructure in protoplanetary disks. A gap-ring pair may be formed when a planet carves a gap in the disk, which produces a local pressure maximum following the gap that traps inwardly drifting dust grains and appears as a bright ring due to the enhanced dust density. A dust-trapping ring would provide a promising environment for solid growth and possibly planetesimal production via the streaming instability. We present evidence of dust trapping in the bright ring of the planet-hosting disk Elias 2-24, from the analysis of 1.3 mm and 3 mm ALMA observations at high spatial resolution (0.029 arcsec, 4.0 au). We leverage the high spatial resolution to demonstrate that larger grains are more efficiently trapped and place constraints on the local turbulence ($8 \times 10^{-4} < α_\mathrm{turb} < 0.03$) and the gas-to-dust ratio ($Σ_g / Σ_d < 30$) in the ring. Using a scattering-included marginal probability analysis we measure a total dust disk mass of $M_\mathrm{dust} = 13.8^{+0.7}_{-0.5} \times 10^{-4} \ M_\odot$. We also show that at the orbital radius of the proposed perturber, the gap is cleared of material down to a flux contrast of 10$^{-3}$ of the peak flux in the disk. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_12819 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | A Dust-Trapping Ring in the Planet-Hosting Disk of Elias 2-24 Carvalho, Adolfo S. Perez, Laura M. Sierra, Anibal Mellado, Maria Jesus Hillenbrand, Lynne A. Andrews, Sean Benisty, Myriam Birnstiel, Tilman Carpenter, John M. Guzman, Viviana V. Huang, Jane Isella, Andrea Kurtovic, Nicolas Ricci, Luca Wilner, David J. Earth and Planetary Astrophysics Solar and Stellar Astrophysics Rings and gaps are among the most widely observed forms of substructure in protoplanetary disks. A gap-ring pair may be formed when a planet carves a gap in the disk, which produces a local pressure maximum following the gap that traps inwardly drifting dust grains and appears as a bright ring due to the enhanced dust density. A dust-trapping ring would provide a promising environment for solid growth and possibly planetesimal production via the streaming instability. We present evidence of dust trapping in the bright ring of the planet-hosting disk Elias 2-24, from the analysis of 1.3 mm and 3 mm ALMA observations at high spatial resolution (0.029 arcsec, 4.0 au). We leverage the high spatial resolution to demonstrate that larger grains are more efficiently trapped and place constraints on the local turbulence ($8 \times 10^{-4} < α_\mathrm{turb} < 0.03$) and the gas-to-dust ratio ($Σ_g / Σ_d < 30$) in the ring. Using a scattering-included marginal probability analysis we measure a total dust disk mass of $M_\mathrm{dust} = 13.8^{+0.7}_{-0.5} \times 10^{-4} \ M_\odot$. We also show that at the orbital radius of the proposed perturber, the gap is cleared of material down to a flux contrast of 10$^{-3}$ of the peak flux in the disk. |
| title | A Dust-Trapping Ring in the Planet-Hosting Disk of Elias 2-24 |
| topic | Earth and Planetary Astrophysics Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2406.12819 |