JWST/MIRI coronagraphic search for planets in systems with gapped exoKuiper belts and proper motion anomalies
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| Format: | Preprint |
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2026
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| author | Bendahan-West, R. Marino, S. Carter, A. L. Squicciarini, V. James, A. D. Sefilian, A. A. Pearce, T. D. Friebe, M. F. Lazzoni, C. Lakeland, B. Ray, S. Wyatt, M. C. Matrà, L. Milli, J. Faramaz, V. C. Henning, Th. Hinkley, S. Kennedy, G. M. Mesa, D. Zurlo, A. |
| author_facet | Bendahan-West, R. Marino, S. Carter, A. L. Squicciarini, V. James, A. D. Sefilian, A. A. Pearce, T. D. Friebe, M. F. Lazzoni, C. Lakeland, B. Ray, S. Wyatt, M. C. Matrà, L. Milli, J. Faramaz, V. C. Henning, Th. Hinkley, S. Kennedy, G. M. Mesa, D. Zurlo, A. |
| contents | Over the past decade, ALMA has uncovered a range of substructures within exoKuiper belts, pointing to a population of undetected planets. With JWST's sensitivity, we now have the opportunity to identify these planets thought to be responsible for the observed substructures in debris discs. We present Cycle 1 JWST/MIRI 11.4 μm coronagraphic observations of three exoKuiper belts that exhibit gaps in their radial structures: HD 92945, HD 107146, and HD 206893, to determine whether planets are responsible for carving these structures, as seen in our Solar System with the gas giants. We reduce the JWST/MIRI data using spaceKLIP, and introduce new routines to mitigate the Brighter-Fatter effect and persistence. We do not detect any planet candidates, and all detected objects in the field-of-view are consistent with background stars or galaxies. However, by combining JWST mass limits, archival observational constraints, and astrometric accelerations, we rule out a significant portion of planet parameter space, placing tight constraints on the planets possibly responsible for these gaps. To interpret these results, we explore multiple gap-carving scenarios in discs, either massless or with non-zero mass, including clearing by in-situ planet(s), as well as shaping by inner planets through mean-motion or secular apsidal resonances. Finally, we conclude that the planets causing the proper motion anomaly in these systems must reside within the inner 20 au. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_02156 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | JWST/MIRI coronagraphic search for planets in systems with gapped exoKuiper belts and proper motion anomalies Bendahan-West, R. Marino, S. Carter, A. L. Squicciarini, V. James, A. D. Sefilian, A. A. Pearce, T. D. Friebe, M. F. Lazzoni, C. Lakeland, B. Ray, S. Wyatt, M. C. Matrà, L. Milli, J. Faramaz, V. C. Henning, Th. Hinkley, S. Kennedy, G. M. Mesa, D. Zurlo, A. Earth and Planetary Astrophysics Over the past decade, ALMA has uncovered a range of substructures within exoKuiper belts, pointing to a population of undetected planets. With JWST's sensitivity, we now have the opportunity to identify these planets thought to be responsible for the observed substructures in debris discs. We present Cycle 1 JWST/MIRI 11.4 μm coronagraphic observations of three exoKuiper belts that exhibit gaps in their radial structures: HD 92945, HD 107146, and HD 206893, to determine whether planets are responsible for carving these structures, as seen in our Solar System with the gas giants. We reduce the JWST/MIRI data using spaceKLIP, and introduce new routines to mitigate the Brighter-Fatter effect and persistence. We do not detect any planet candidates, and all detected objects in the field-of-view are consistent with background stars or galaxies. However, by combining JWST mass limits, archival observational constraints, and astrometric accelerations, we rule out a significant portion of planet parameter space, placing tight constraints on the planets possibly responsible for these gaps. To interpret these results, we explore multiple gap-carving scenarios in discs, either massless or with non-zero mass, including clearing by in-situ planet(s), as well as shaping by inner planets through mean-motion or secular apsidal resonances. Finally, we conclude that the planets causing the proper motion anomaly in these systems must reside within the inner 20 au. |
| title | JWST/MIRI coronagraphic search for planets in systems with gapped exoKuiper belts and proper motion anomalies |
| topic | Earth and Planetary Astrophysics |
| url | https://arxiv.org/abs/2601.02156 |