# Dependence of stellar differential rotation on effective temperature and rotation: an analysis from starspot transit mapping

**Authors:**  Araújo,  Valio  
**arXiv:** [2309.10805](https://arxiv.org/abs/2309.10805)  
**Date:** 2023-09-19  
**Summary page:** https://www.summarizepaper.com/en/arxiv-id/2309.10805v1/

## Key points

- Study investigates relationship between rotational shear, effective temperature, and average rotation period in solar-type and M stars
- Stellar rotation provides insights into age, angular momentum transfer, and magnetic fields of stars
- Researchers used starspot transit mapping to detect differential shear in 13 slowly rotating stars observed by Kepler and CoRoT satellites
- Significant negative correlation found between rotational shear and mean period of stellar rotation (correlation coefficient of -0.77)
- Weak correlation observed between differential rotation and effective temperature of the stars
- Study provides valuable insights into complex relationship between stellar parameters and differential rotation using previously collected spot transit mapping data
- Findings enhance understanding of stellar evolution and magnetic dynamos
- Research contributes to advancing knowledge of how stellar rotation influences star formation and development

## Summary

In the study titled "Dependence of stellar differential rotation on effective temperature and rotation: an analysis from starspot transit mapping," Araújo and Valio investigate the relationship between rotational shear, effective temperature, and average rotation period in solar-type and M stars. Stellar rotation plays a crucial role in understanding stellar evolution as it provides insights into age, angular momentum transfer, and magnetic fields of stars. The researchers utilized starspot transit mapping to detect differential shear in 13 slowly rotating stars with spectral types ranging from M to F, which were observed by the Kepler and CoRoT satellites. The findings of the study reveal a significant negative correlation between rotational shear and the mean period of stellar rotation. This correlation coefficient of -0.77 suggests that the rotational shear may serve as an indicator of stellar age. On the other hand, a weak correlation was observed between differential rotation and the effective temperature of the stars. By analyzing previously collected spot transit mapping data, this study provides valuable insights into the complex relationship between stellar parameters and differential rotation. These findings enhance our understanding of stellar evolution and magnetic dynamos. Overall, this research contributes significantly to advancing our knowledge of how stellar rotation influences various aspects of star formation and development.