The slower rotation of planet-hosting stars revisited

@misc{binnenfeld2026slower,
  title = {{The slower rotation of planet-hosting stars revisited}},
  author = {Avraham Binnenfeld and Amitay Sussholz and Simchon Faigler and Tsevi Mazeh},
  howpublished = {arXiv},
  year = {2026},
  month = nov,
  doi = {10.48550/arxiv.2611.08267},
  eprint = {2611.08267},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2611.08267},
  note = {CC BY 4.0},
}

TY  - UNPB
TI  - The slower rotation of planet-hosting stars revisited
AU  - Avraham Binnenfeld
AU  - Amitay Sussholz
AU  - Simchon Faigler
AU  - Tsevi Mazeh
PY  - 2026
DA  - 2026/11/05
PB  - arXiv
DO  - 10.48550/arxiv.2611.08267
UR  - https://arxiv.org/abs/2611.08267
AB  - Previous studies combined rotation periods derived from Kepler photometry, stellar parameters from previous Gaia Data Releases, and planet hosts from the NASA Exoplanet Archive to conclude that statistically planet-hosting stars rotate slower than stars without detected planets. Here, we revisit these studies by using similar Kepler rotational period sample, but with an updated Gaia DR3-based stellar parameter catalogue and an updated exoplanet catalogue. We apply minimal sample cuts in evolutionary state, metallicity, and distance, and then model the stellar rotation period as a function of effective temperature alone. For each star, we derive the ratio of its observed period to the temperature-expected period, and compare the ratio distributions for the planet-host and non-host stars. For periods shorter than 20 d, the planet-host distribution of this ratio is shifted towards longer periods; the period-ratio median is ~15% larger for hosts than for non-hosts (p_KS = 2.4 x 10^-4). We also examine the recently published TESS All-Sky Rotation Survey (TARS) and find a similar trend. However, the strongly structured period distribution precludes a robust comparison between the host and the non-host stars. Therefore, the updated analysis, using more robust stellar and planetary parameters, recovers the previously reported association, strengthening the case for a genuine connection between stellar rotation and planet occurrence.
ER  -