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| Main Authors: | , |
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| Format: | Preprint |
| Published: |
2025
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| Online Access: | https://arxiv.org/abs/2506.13580 |
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| _version_ | 1866913945476923392 |
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| author | Xiao, Guang-Yao Feng, Fabo |
| author_facet | Xiao, Guang-Yao Feng, Fabo |
| contents | The mutual inclination $ψ$ between orbits within multi-planetary systems is difficult to measure directly. Through a joint analysis of RVs, Hipparcos-Gaia absolute astrometry and relative astrometry of JWST, \citet{Bardalez2025} recently found two possible values of $ψ_{bc}={32_{-15.1}^{+13.6}}^{\circ}$ and $ψ_{bc}={145.0_{-11.1}^{+15.8}}^{\circ}$ for the nearby, non-transit planet system, 14\,Her. By incorporating additional astrometry from Gaia second data release (DR2), we have further constrained the orbital orientation of 14\,Her\,b, resulting in a definitive and unambiguous mutual inclination of $ψ_{bc}={35.3_{-7.3}^{+6.8}}^{\circ}$. The unusual misaligned orbital architecture of 14\,Her system may serve as a benchmark for dynamical studies. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_13580 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Updated Mutual Inclination Measurement for 14 Her b and c Xiao, Guang-Yao Feng, Fabo Earth and Planetary Astrophysics The mutual inclination $ψ$ between orbits within multi-planetary systems is difficult to measure directly. Through a joint analysis of RVs, Hipparcos-Gaia absolute astrometry and relative astrometry of JWST, \citet{Bardalez2025} recently found two possible values of $ψ_{bc}={32_{-15.1}^{+13.6}}^{\circ}$ and $ψ_{bc}={145.0_{-11.1}^{+15.8}}^{\circ}$ for the nearby, non-transit planet system, 14\,Her. By incorporating additional astrometry from Gaia second data release (DR2), we have further constrained the orbital orientation of 14\,Her\,b, resulting in a definitive and unambiguous mutual inclination of $ψ_{bc}={35.3_{-7.3}^{+6.8}}^{\circ}$. The unusual misaligned orbital architecture of 14\,Her system may serve as a benchmark for dynamical studies. |
| title | Updated Mutual Inclination Measurement for 14 Her b and c |
| topic | Earth and Planetary Astrophysics |
| url | https://arxiv.org/abs/2506.13580 |