Dust distribution around low-mass planets on converging orbits
Abstract
Context: Super-Earths can form at large orbital radii and migrate inward due to tidal interactions with the circumstellar disk. In this scenario, convergent migration may occur and lead to the formation of resonant pairs of planets. Aim: We explore the conditions under which convergent migration and resonance capture take place, and what dynamical consequences can be expected on the dust distribution surrounding the resonant pair. Methods: We combine hydrodynamic planet–disk interaction models with dust evolution calculations to investigate the signatures produced in the dust distribution by a pair of planets in mean-motion resonances. Results: We find that convergent migration takes place when the outer planet is the more massive. However, convergent migration also depends on the local properties of the disk, and divergent migration may result as well. For similar disk parameters, the capture in low degree resonances (e.g., 2:1 or 3:2) is preferred close to the star where the resonance strength can more easily overcome the tidal torques exerted by the gaseous disk. Farther away from the star, convergent migration may result in capture in high degree resonances. The dust distribution shows potentially observable features typically when the planets are trapped in a 2:1 resonance. In other cases, withmore »
- Authors:
-
[1];
[2]
- Univ. of Padova (Italy)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Publication Date:
- Research Org.:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA); National Aeronautics and Space Administration (NASA)
- OSTI Identifier:
- 1711413
- Report Number(s):
- LA-UR-20-27037
Journal ID: ISSN 0004-6361; TRN: US2204660
- Grant/Contract Number:
- 89233218CNA000001; 80HQTR19T0086
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Astronomy and Astrophysics
- Additional Journal Information:
- Journal Volume: 641; Journal ID: ISSN 0004-6361
- Publisher:
- EDP Sciences
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS; planet-disk interactions; zodiacal dust
Citation Formats
Marzari, Francesco, and D’Angelo, Gennaro. Dust distribution around low-mass planets on converging orbits. United States: N. p., 2020.
Web. doi:10.1051/0004-6361/202038297.
Marzari, Francesco, & D’Angelo, Gennaro. Dust distribution around low-mass planets on converging orbits. United States. https://doi.org/10.1051/0004-6361/202038297
Marzari, Francesco, and D’Angelo, Gennaro. Fri .
"Dust distribution around low-mass planets on converging orbits". United States. https://doi.org/10.1051/0004-6361/202038297. https://www.osti.gov/servlets/purl/1711413.
@article{osti_1711413,
title = {Dust distribution around low-mass planets on converging orbits},
author = {Marzari, Francesco and D’Angelo, Gennaro},
abstractNote = {Context: Super-Earths can form at large orbital radii and migrate inward due to tidal interactions with the circumstellar disk. In this scenario, convergent migration may occur and lead to the formation of resonant pairs of planets. Aim: We explore the conditions under which convergent migration and resonance capture take place, and what dynamical consequences can be expected on the dust distribution surrounding the resonant pair. Methods: We combine hydrodynamic planet–disk interaction models with dust evolution calculations to investigate the signatures produced in the dust distribution by a pair of planets in mean-motion resonances. Results: We find that convergent migration takes place when the outer planet is the more massive. However, convergent migration also depends on the local properties of the disk, and divergent migration may result as well. For similar disk parameters, the capture in low degree resonances (e.g., 2:1 or 3:2) is preferred close to the star where the resonance strength can more easily overcome the tidal torques exerted by the gaseous disk. Farther away from the star, convergent migration may result in capture in high degree resonances. The dust distribution shows potentially observable features typically when the planets are trapped in a 2:1 resonance. In other cases, with higher degree resonances (e.g., 5:4 or 6:5) dust features may not be sufficiently pronounced to be easily observable. Conclusions: The degree of resonance established by a pair of super-Earths may be indicative of the location in the disk where capture occurred. There can be significant differences in the dust distribution around a single super-Earth and a pair of super-Earths in resonance.},
doi = {10.1051/0004-6361/202038297},
journal = {Astronomy and Astrophysics},
number = ,
volume = 641,
place = {United States},
year = {Fri Sep 18 00:00:00 EDT 2020},
month = {Fri Sep 18 00:00:00 EDT 2020}
}
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