【最近这颗恒星在天文界火了,它的变暗意味着什么】

【最近这颗恒星在天文界火了,它的变暗意味着什么】KIC 8462852恒星最近正在变暗,这让科学家们很惊奇。他们立即捕捉了变暗中的恒星光谱,从中可以推测,如果是光谱是持续变暗的,说明这是由星球一样的固体物质导致的。如果是不均匀,可能是由尘埃或气体导致。当然,只有进一步的观察和研究才能得出准确答案,而这颗恒星的变暗或将成为宇宙探索的又一突破口。

Live look at the 'alien megastructure' star may solve mysteries

It's a rare chance to look at the star's strange behavior while it's happening.

Astronomers may have ruled out an alien megastructure as the likely cause behind KIC 8462852's strange dimming, but it's still mysterious -- and that's partly due to the lack of live data (as live as you can get for a star 1,277 light years away, at least). How do you understand what's going on when you have to rely solely on historical info that doesn't even account for the star's spectrum? Thankfully, researchers are getting that big chance: they've caught the star in mid-dimming, and they have numerous telescopes trained on it. If they can record the spectrum before and after the oddball behavior, they may have a better idea of the root cause.

Scientists don't expect to find comets. They've mostly ruled that out given that the dimming has taken place for several decades or more. However, the spectral data could at least point them in the right direction. If there's consistent spectral dimming, it would point to a solid object like a planet. More uneven dimming, meanwhile, could point to dust or gas as the culprit.

A definitive answer isn't all that likely, at least not without extended analysis. With that said, just having a general idea of what's involved could be enough to shoot down wilder theories and narrow the focus. That, in turn, could improve humanity's overall understanding of the cosmos and prepare for the next time researchers spot something they can't immediately explain.

https://www.engadget.com/2017/05/20/live-look-at-alien-megastructure-star/


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