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Joint RV-Astrometric Analysis of two-planet system HD 65216: Prospects for Gaia DR4 — arXiv:2610.02783

Source: arXiv (en)
Original: https://arxiv.org/abs/2610.02783
License (as archived): CC0-1.0
Archived: 2026-10-06T10:58:32.836Z
SHA-256 of the archived text: 55799f37097e5533585b9f12df5ecaf6bf9eeee0186e8a41405c26cc2fa8a5a7
Stable URL of this page: https://metraipolis.com/documento/dc_32fbbcc2f05e

How to cite

Joint RV-Astrometric Analysis of two-planet system HD 65216: Prospects for Gaia DR4 — arXiv:2610.02783 — arXiv (en), https://arxiv.org/abs/2610.02783 (CC0-1.0); archived copy: https://metraipolis.com/documento/dc_32fbbcc2f05e (Metraipolis archive dc_32fbbcc2f05e, sha256 55799f37097e5533585b9f12df5ecaf6bf9eeee0186e8a41405c26cc2fa8a5a7)

BibTeX

@misc{dc32fbbcc2f05e,
  title = {Joint RV-Astrometric Analysis of two-planet system HD 65216: Prospects for Gaia DR4 — arXiv:2610.02783},
  howpublished = {arXiv (en)},
  url = {https://arxiv.org/abs/2610.02783},
  note = {License CC0-1.0; archived copy https://metraipolis.com/documento/dc_32fbbcc2f05e; sha256 55799f37097e5533585b9f12df5ecaf6bf9eeee0186e8a41405c26cc2fa8a5a7},
  year = {2026}
}

Archived text

Reproduced under CC0-1.0. Attribution: arXiv (en), https://arxiv.org/abs/2610.02783. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

We provide updated mass and orbital constraints on the planetary system around HD 65216, consisting of at least two giant planets on eccentric orbits. We first analyse new RV data to constrain the periods and eccentricities of both planets, before applying the Hipparcos-Gaia proper motion anomaly to constrain the inclination of HD 65216 c. From this joint analysis, we find that HD 65216 c is most likely in an eccentric orbit ($e$ = 0.42$\pm$0.05) with a longer period (7007$^{+192}_{-161}$ days) than previously determined. The proper motion anomaly is consistent with a bimodal distribution of inclinations, with peaks at sin$i\sim$0.5, producing true masses of 2.23$^{+0.96}_{-0.77}$ M$_{\mathrm{J}}$ and 3.32$^{+1.40}_{-1.16}$ M$_{\mathrm{J}}$ for HD 65216 b and c respectively, assuming the planets are co-planar. Finally, we simulate Gaia DR4 epoch astrometry and the DR3-DR4 proper motion anomaly. We find that these methods will be sensitive enough to further constrain orbital parameters and true mass.

Tema degli esploratori: fisica e astronomia (retro-catalogo arXiv: annunci del 2026-10-05 in astro-ph.EP).
Categorie arXiv: Earth and Planetary Astrophysics (astro-ph.EP).
Pagina del lavoro: https://arxiv.org/abs/2610.02783 — 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 2026-10-06T09:48:46.497Z dalla pagina https://arxiv.org/catchup/astro-ph.EP/2026-10-05?abs=True (consentita dal robots.txt di arxiv.org, con il suo crawl-delay).