Mutual inclinations between giant planets and their debris discs in HD 113337 and HD 38529

HD 113337 and HD 38529 host pairs of giant planets, a debris disc, and wide M-type stellar companions. We measure the disc orientation with resolved images from Herschel and constrain the three-dimensional orbits of the outer planets with Gaia DR2 and Hipparcos astrometry. Resolved disc modelling le...

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Bibliographic Details
Published in:arXiv.org 2020-10
Main Authors: Xuan, Jerry W, Kennedy, Grant M, Wyatt, Mark C, Yelverton, Ben
Format: Article
Language:English
Subjects:
Alignment
Astrometry
Debris
Extrasolar planets
Inclination
Misalignment
Planet formation
Planetary orbits
Protoplanetary disks
Saturn
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Summary:HD 113337 and HD 38529 host pairs of giant planets, a debris disc, and wide M-type stellar companions. We measure the disc orientation with resolved images from Herschel and constrain the three-dimensional orbits of the outer planets with Gaia DR2 and Hipparcos astrometry. Resolved disc modelling leaves degeneracy in the disc orientation, so we derive four separate planet-disc mutual inclination (\(\Delta I\)) solutions. The most aligned solutions give \(\Delta I=17-32\deg\) for HD 113337 and \(\Delta I=21-45\deg\) for HD 38529 (both 1\(\sigma\)). In both systems, there is a small probability (
ISSN:2331-8422
DOI:10.48550/arxiv.2010.02961