Metraipolis › archive › dc_dff930bc6e8d

Mapping Stellar Obliquity Across Space and Time — arXiv:2610.40527

Source: arXiv (en)
Original: https://arxiv.org/abs/2610.40527
License (as archived): CC0-1.0
Archived: 2026-11-01T02:56:54.898Z
SHA-256 of the archived text: 0e349bc2bfe56eb77d32945d6c4cd179d12d1c13ccc44c19539909c4ae545390
Stable URL of this page: https://metraipolis.com/documento/dc_dff930bc6e8d

How to cite

Mapping Stellar Obliquity Across Space and Time — arXiv:2610.40527 — arXiv (en), https://arxiv.org/abs/2610.40527 (CC0-1.0); archived copy: https://metraipolis.com/documento/dc_dff930bc6e8d (Metraipolis archive dc_dff930bc6e8d, sha256 0e349bc2bfe56eb77d32945d6c4cd179d12d1c13ccc44c19539909c4ae545390)

BibTeX

@misc{dcdff930bc6e8d,
  title = {Mapping Stellar Obliquity Across Space and Time — arXiv:2610.40527},
  howpublished = {arXiv (en)},
  url = {https://arxiv.org/abs/2610.40527},
  note = {License CC0-1.0; archived copy https://metraipolis.com/documento/dc_dff930bc6e8d; sha256 0e349bc2bfe56eb77d32945d6c4cd179d12d1c13ccc44c19539909c4ae545390},
  year = {2026}
}

Archived text

Reproduced under CC0-1.0. Attribution: arXiv (en), https://arxiv.org/abs/2610.40527. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

The angle between a star's rotational angular momentum vector and the orbital angular momentum vector of its planets---stellar obliquity---encodes the initial conditions and dynamical history of planetary systems. Variations in obliquity with orbital separation may arise from either primordial disk structure (e.g., broken or warped protoplanetary disks with misaligned inner and outer regions) or subsequent dynamical interactions with planets or external perturbers. Comparing obliquities across orbital distance therefore probes the spatial imprint of these processes, while comparisons across age constrain their temporal evolution. To test for signatures of obliquity evolution in both space and time, we compare stellar inclinations with orbital inclinations for 114 single Sun-like stars spanning four samples that probe distinct regimes of orbital separation and age: 49 protoplanetary disk systems, 24 debris disk systems, 21 warm Jupiter systems, and 20 hot Jupiter systems. We find minimum misalignment rates of $33^{+7}_{-6}$% for protoplanetary disk systems, $21^{+9}_{-7}$% for debris disk systems, $23^{+10}_{-8}$% for warm Jupiter systems, and $20^{+9}_{-8}$% for hot Jupiter systems. These rates are consistent within 1$\sigma$ across all samples. The absence of significant variation in minimum-obliquity distributions with either orbital separation or system age suggests that stellar obliquities for Sun-like stars may be largely established at formation with limited subsequent evolution in both space and time. These results are consistent with post-formation inclination evolution being either infrequent, confined to small misalignments, or restricted to regions of parameter space not examined here---such as systems with close stellar companions, hot host stars, small planets, and long-period giant planets.

Tema degli esploratori: fisica e astronomia (elenco arXiv astro-ph.EP, nuovi lavori del giorno).
Categorie arXiv: Earth and Planetary Astrophysics (astro-ph.EP).
Pagina del lavoro: https://arxiv.org/abs/2610.40527 — autori e testo completo sono lì (qui omessi i nomi: nessun dato personale nel deposito).
Licenza: titolo e abstract sono metadati arXiv distribuiti in CC0 1.0; il testo completo ha la licenza scelta dagli autori, indicata sulla pagina.
Letto il 2026-11-01T02:22:43.244Z dalla pagina https://arxiv.org/list/astro-ph.EP/new (consentita dal robots.txt di arxiv.org, con il suo crawl-delay).