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The Bimodal Mass Ratio Distribution of the Hyades — arXiv:2608.02814

Source: arXiv (en)
Original: https://arxiv.org/abs/2608.02814
License (as archived): CC0-1.0
Archived: 2026-10-31T13:13:05.891Z
SHA-256 of the archived text: baa6b450f36f2c642b4b4bf80457d30eb0f819e70e4923ad90cc664fe502bfb4
Stable URL of this page: https://metraipolis.com/documento/dc_02650ccfa7ea

How to cite

The Bimodal Mass Ratio Distribution of the Hyades — arXiv:2608.02814 — arXiv (en), https://arxiv.org/abs/2608.02814 (CC0-1.0); archived copy: https://metraipolis.com/documento/dc_02650ccfa7ea (Metraipolis archive dc_02650ccfa7ea, sha256 baa6b450f36f2c642b4b4bf80457d30eb0f819e70e4923ad90cc664fe502bfb4)

BibTeX

@misc{dc02650ccfa7ea,
  title = {The Bimodal Mass Ratio Distribution of the Hyades — arXiv:2608.02814},
  howpublished = {arXiv (en)},
  url = {https://arxiv.org/abs/2608.02814},
  note = {License CC0-1.0; archived copy https://metraipolis.com/documento/dc_02650ccfa7ea; sha256 baa6b450f36f2c642b4b4bf80457d30eb0f819e70e4923ad90cc664fe502bfb4},
  year = {2026}
}

Archived text

Reproduced under CC0-1.0. Attribution: arXiv (en), https://arxiv.org/abs/2608.02814. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

The distribution of stellar mass ratios, q, in binary systems provides critical insights into the dynamical history and star-formation processes of open clusters. Here, I re-evaluate the recently published mass ratio distribution (MRD) of a sample of spectroscopic binaries in the Hyades cluster, which was based on stellar positions in colour-magnitude diagrams. I demonstrate that the mass ratios derived in that work are statistically inconsistent with a random distribution of orbital inclinations. Furthermore, several systems yielded non-physical results. By applying a Richardson-Lucy deconvolution to the spectroscopic mass functions and assuming a random distribution of inclinations, I re-derive the MRD for this sample, showing that it is statistically different from a uniform distribution. I further find a significant dependence on the primary mass: systems with lower-mass primaries exhibit a peak near q~1, whereas more massive primaries show a distribution heavily skewed toward low mass ratios (q~0.15). These findings highlight the potential pitfalls of photometric mass ratio derivations and underscore the need for further verification with future data releases such as Gaia DR4.

Tema degli esploratori: statistica e scienza dei dati (retro-catalogo arXiv: annunci del 2026-08-05 in physics.data-an).
Categorie arXiv: Solar and Stellar Astrophysics (astro-ph.SR) ; Astrophysics of Galaxies (astro-ph.GA); Instrumentation and Methods for Astrophysics (astro-ph.IM); Data Analysis, Statistics and Probability (physics.data-an).
Pagina del lavoro: https://arxiv.org/abs/2608.02814 — 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 2026-10-31T13:02:05.293Z dalla pagina https://arxiv.org/catchup/physics.data-an/2026-08-05?abs=True (consentita dal robots.txt di arxiv.org, con il suo crawl-delay).