The effort to understand red dwarf flaring and variability continues. There's a lot we don't know about these plentiful stars.
But there’s still a lot astronomers don’t know about red dwarfs and their wild nature. A new study examined 177 M-dwarfs to better understand their long-term variability. The researchers found that red dwarf behaviour is more complex than thought, and even the calmest red dwarfs are wilder than the Sun.” The paper will be published in the journal Astronomy and Astrophysics.
An artist’s illustration of the Parker Solar Probe approaching the Sun. Spacecraft like this one mean we understand our Sun and its activity in much greater detail than we do red dwarfs. Image Credit: NASA This artist’s illustration shows a red dwarf emitting an extremely powerful X-ray flare. Astronomers want to know more about red dwarfs and their flaring to see how it affects the potential habitability of exoplanets around red dwarfs. In this study, the researchers looked at red dwarf chromospheric activity for signs of variability. Image Credit: NASA’s Goddard Space Flight Center
The researchers found cycles in their sample ranging from several years to more than 20 years. But they’re quick to point out that their findings have limitations and that their study is just an initial step towards a better understanding of red dwarfs. For many of the stars, there’s a strong indication that long-term variability exists. “… better-sampled stars might exhibit a more complex behaviour if they had been better sampled,” they write.
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