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May 15, 2015 06:00 am
Original Link: http://rss.slashdot.org/~r/Slashdot/slashdot/~3/diaS7rYJQnY/keplers-superflare-stars-sport-huge-angry-starspots
Kepler's "Superflare" Stars Sport Huge, Angry Starspots
astroengine writes: Astronomers studying stars like our sun that are known to generate powerful "superflares" have also discovered that these superflares are likely associated with monster "starspots." In 2012, using Kepler Space Telescope data — which is usually associated with the detection of exoplanets as they drift (or transit) in front of their host stars — astronomers were able to identify several hundred superflare events on a number of sun-like stars. These gargantuan events kicked out flares 10-10,000 times more energy than our sun is able to muster. Keeping in mind that these stars are sun-like stars, what makes them such superflare powerhouses? Why is our sun such a featherweight in comparison? In an effort to understand the dynamics of superflare stars and perhaps answer these questions, astronomers from Kyoto University, University of Hyogo, the National Astronomical Observatory of Japan (NAOJ) and Nagoya University turned to the High Dispersion Spectrograph on the Subaru Telescope, located atop Mauna Kea in Hawaii, to carry out spectroscopic measurements of 50 of Kepler's superflare targets. And they found that all the superflare stars possessed huge starspots that completely dwarf our sun's sunspots.Read more of this story at Slashdot.
Original Link: http://rss.slashdot.org/~r/Slashdot/slashdot/~3/diaS7rYJQnY/keplers-superflare-stars-sport-huge-angry-starspots
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