| DOI | Trouver le DOI : https://doi.org/10.3847/1538-3881/aac268 |
|---|
| Auteur | Rechercher : Volk, Kathryn; Rechercher : Murray-Clay, Ruth A.; Rechercher : Gladman, Brett J.1; Rechercher : Lawler, Samantha M.1; Rechercher : Yu, Tze yeung Mathew; Rechercher : Alexandersen, Mike; Rechercher : Bannister, Michele T.1; Rechercher : Chen, Ying-Tung; Rechercher : Dawson, Rebekah I.; Rechercher : Greenstreet, Sarah; Rechercher : Gwyn, Stephen D. J.1; Rechercher : Kavelaars, J. J.1; Rechercher : Lin, Hsing Wen2; Rechercher : Lykawka, Patryk Sofia; Rechercher : Petit, Jean-Marc |
|---|
| Affiliation | - Conseil national de recherches du Canada. Herzberg en astronomie et en astrophysique
- Conseil national de recherches du Canada. Institut Herzberg d'astrophysique du CNRC
|
|---|
| Format | Texte, Article |
|---|
| Résumé | We discuss the detection in the Outer Solar System Origins Survey (OSSOS) of two objects in Neptune's distant 9:1 mean motion resonance at semimajor axis a ≈ 130 au. Both objects are securely resonant on 10 Myr timescales, with one securely in the 9:1 resonance's leading asymmetric libration island and the other in either the symmetric or trailing asymmetric island. These objects are the largest semimajor axis objects with secure resonant classifications, and their detection in a carefully characterized survey allows for the first robust resonance population estimate beyond 100 au. The detection of these objects implies a 9:1 resonance population of 1.1 × 104 objects with H r < 8.66 (D gsim 100 km) on similar orbits (95% confidence range of ~(0.4–3) × 104). Integrations over 4 Gyr of an ensemble of clones spanning these objects' orbit-fit uncertainties reveal that they both have median resonance occupation timescales of ~1 Gyr. These timescales are consistent with the hypothesis that these objects originate in the scattering population but became transiently stuck to Neptune's 9:1 resonance within the last ~1 Gyr of solar system evolution. Based on simulations of a model of the current scattering population, we estimate the expected resonance sticking population in the 9:1 resonance to be 1000–4500 objects with H r < 8.66; this is marginally consistent with the OSSOS 9:1 population estimate. We conclude that resonance sticking is a plausible explanation for the observed 9:1 population, but we also discuss the possibility of a primordial 9:1 population, which would have interesting implications for the Kuiper Belt's dynamical history. |
|---|
| Date de publication | 2018-06-01 |
|---|
| Maison d’édition | American Astronomical Society |
|---|
| Dans | |
|---|
| Langue | anglais |
|---|
| Publications évaluées par des pairs | Oui |
|---|
| Numéro NPARC | 23003819 |
|---|
| Exporter la notice | Exporter en format RIS |
|---|
| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
|---|
| Identificateur de l’enregistrement | 3b930bd1-a3f4-43ea-a770-466b82fc3cc3 |
|---|
| Enregistrement créé | 2018-08-13 |
|---|
| Enregistrement modifié | 2020-03-16 |
|---|
