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Journal Article

The Sun is less active than other solar-like stars

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Reinhold,  Timo
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;
ERC Starting Grant: Connecting Solar and Stellar Variabilities (SOLVe), Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons189132

Shapiro,  Alexander
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;
ERC Starting Grant: Connecting Solar and Stellar Variabilities (SOLVe), Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons104218

Solanki,  Sami K.
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons104034

Krivova,  Natalie A.
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons103859

Cameron,  Robert H.
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

Amazo-Gómez, ,  Eliana M.
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

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Citation

Reinhold, T., Shapiro, A., Solanki, S. K., Montet, B. T., Krivova, N. A., Cameron, R. H., et al. (2020). The Sun is less active than other solar-like stars. Science, 368(6490), 518-521. doi:10.1126/science.aay3821.


Cite as: https://hdl.handle.net/21.11116/0000-0006-53B7-E
Abstract
The magnetic activity of the Sun and other stars causes their brightness to vary. We investigated how typical the Sun’s variability is compared with other solar-like stars, i.e., those with near-solar effective temperatures and rotation periods. By combining 4 years of photometric observations from the Kepler space telescope with astrometric data from the Gaia spacecraft, we were able to measure photometric variabilities of 369 solar-like stars. Most of those with well-determined rotation periods showed higher variability than the Sun and are therefore considerably more active. These stars appear nearly identical to the Sun except for their higher variability. Therefore, we speculate that the Sun could potentially also go through epochs of such high variability.