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1 in 10 Red Giants are Covered in Spots, and They Rotate Surprisingly Quickly

Discussion in 'Astronomy and Space News' started by Universe Today, Jul 14, 2020.

1 in 10 Red Giants are Covered in Spots, and They Rotate Surprisingly Quickly

Started by Universe Today on Jul 14, 2020 at 2:42 PM

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  1. Universe Today

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    Universe Today, Jul 14, 2020
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    1 in 10 Red Giants are Covered in Spots, and They Rotate Surprisingly Quickly
    by Evan Gough

    Sunspots are common on our Sun. These darker patches are cooler than their surroundings, and they’re caused by spikes in magnetic flux that inhibit convection. Without convection, those areas cool and darken. Lots of other stars have sunspots, too. But Red Giants (RGs) don’t. Or so astronomers thought. A new study shows that some RGs …

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