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On the Inference of a Star's Inclination Angle from its Rotation Velocity and Projected Rotation Velocity

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arxiv 2001.04973 v2 pith:MUEGUMH6 submitted 2020-01-14 astro-ph.IM astro-ph.EPastro-ph.SR

On the Inference of a Star's Inclination Angle from its Rotation Velocity and Projected Rotation Velocity

classification astro-ph.IM astro-ph.EPastro-ph.SR
keywords rotationstarvelocityaxisinclinationinferenceangleappear
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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It is possible to learn about the orientation of a star's rotation axis by combining measurements of the star's rotation velocity ($v$) and its projection onto our line of sight ($v\sin i$). This idea has found many applications, including the investigation of the obliquities of stars with transiting planets. Here, we present a method for the probabilistic inference of the inclination of the star's rotation axis based on independent data sets that constrain $v$ and $v\sin i$. We also correct several errors and misconceptions that appear in the literature.

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Cited by 4 Pith papers

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

  1. Warm Sub-Saturns Orbiting Single Stars Are Spin-Orbit Aligned

    astro-ph.EP 2026-07 conditional novelty 6.0

    Warm sub-Saturns around single cool stars are predominantly aligned whereas hot sub-Saturns are frequently misaligned (3.2σ), a separation-dependent transition the authors attribute to high-eccentricity migration.

  2. Understanding eccentric temperate giants: an in-depth study of the architecture and stellar obliquity of the TOI-2134 system

    astro-ph.EP 2026-07 accept novelty 5.0

    New data break the eccentricity multimodality of TOI-2134 c to e=0.31±0.01, refine both planets' masses and radii, and yield a 4.7σ RM obliquity of 59±31° for planet c.

  3. Understanding eccentric temperate giants: an in-depth study of the architecture and stellar obliquity of the TOI-2134 system

    astro-ph.EP 2026-07 unverdicted novelty 4.0

    Updated analysis of TOI-2134 with new TESS sectors and spectra confirms an inner mini-Neptune and outer eccentric sub-Saturn, measures their masses and radii, and reports a 59 degree obliquity for the outer planet via...

  4. Understanding eccentric temperate giants: an in-depth study of the architecture and stellar obliquity of the TOI-2134 system

    astro-ph.EP 2026-07 unverdicted novelty 3.0

    New observations confirm a mini-Neptune (9.23 d, circular) and eccentric sub-Saturn (95.85 d, e=0.31) around TOI-2134 with 59 deg obliquity for the outer planet.