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The IACOB project. VII. The rotational properties of Galactic massive O-type stars revisited

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arxiv 2207.12776 v1 pith:UMIJWOS7 submitted 2022-07-26 astro-ph.SR astro-ph.GA

G. Holgado , S. Simón-Díaz , A. Herrero , R. H. Barbá This is my paper · ORCID
classification astro-ph.SRastro-ph.GA
keywords starsbinarydistributionevolutionarygalacticiacobmassiveo-type
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Stellar rotation is of key importance for the formation process, evolution, and final fate of massive stars. In this paper we review results from the study of the spin rate properties of a sample of more than 400 Galactic O-type stars surveyed by the IACOB and OWN projects. By combining vsini, Teff, and logg estimates (resulting from a detailed quantitative spectroscopic analysis) with information about the spectroscopic binarity status for an important fraction of the stars in the sample, we provide a renewed overview about how the empirical distribution of projected rotational velocities in the O-star domain depends on mass, evolutionary and binary status. The obtained distributions are then compared with predictions of several state-of-the-art evolutionary models for single stars, as well as from population synthesis simulations including binary interaction, and used to provide hints about the initial velocity distribution of stars with masses in the range ~15-80 Msol.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. The IACOB project XIX. Revisiting massive-star evolution with empirical TAMS constraints: updated models, overshoot calibration, and the population of blue supergiants

    astro-ph.SR 2026-07 conditional novelty 6.0 of 10

    Massive-star models require mass-dependent core overshoot (α_ov ≈ 0.18–0.45) to match the empirical TAMS, but still fail to explain the velocity dependence of the TAMS and the observed blue supergiant population.

  2. The IACOB project XVIII. Prevalence of short-period binaries among Galactic helium rich O-type stars

    astro-ph.SR 2026-08 conditional novelty 5.0 of 10

    In 45 O-type binaries, all seven helium-rich systems are short-period runaways, suggesting binary interaction is the main cause of helium enrichment.

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