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Superstar Is Remnant of Three-Star System Mangled by Black Hole

Here’s what scientists think happened, oh, about a hundred million years ago. There was this three-star system. The three linked stars were strolling through the galaxy but got too close to the giant black hole at the center. The hole swallowed one of those stars and hurled away the other two. Those two careening stars merged to form one super-hot, incredibly fast-moving blue star, which is now on the very outskirts of the Milky Way.

科學(xué)家們?nèi)缡钦f：約一億年前，有這么一個(gè)三恒星系。這三顆親密無(wú)間的恒星在銀河系里遨游，不過它們離銀心太近，一不小心遭遇了那里的黑洞。黑洞吞沒了其中一顆恒星，甩飛了另外兩顆。這兩顆恒星跌跌撞撞，最終合體形成了一個(gè)超熱量、超高速的藍(lán)色星球，現(xiàn)如今已在遙遠(yuǎn)的銀河系盡頭。

And here’s how scientists came up with that dramatic tale, which they just published in Astrophysical Journal Letters. [Warren Brown et al., SLafm]

科學(xué)家們是如何編織出這么奇幻的故事的呢？《天文物理期刊通訊》就有記載。

They discovered what they call a hypervelocity star, which moves three times faster than our sun does through the galaxy. According to new information provided by the Hubble telescope, the star originated deep within the Milky Way.

科學(xué)家們發(fā)現(xiàn)了一顆以太陽(yáng)的3倍速度劃過銀河系的恒星，他們稱之為超高速恒星。通過哈勃望遠(yuǎn)鏡觀察得來(lái)的最新資料顯示，這顆恒星衍生于銀河系深處。

The scientists used the Hubble to figure out the direction of the star’s travels and the distance from the galactic center, along with the star’s mass, age and speed. Its unusual attributes give rise to the idea that one star was swallowed and transferred its momentum to the other two, which transformed into a blue superstar. Hurtling through the galaxy, faster than a speeding sun.

科學(xué)家們借助哈勃望遠(yuǎn)鏡測(cè)算出超高速恒星的運(yùn)行方向、與銀心的距離以及該恒星的質(zhì)量、年齡和速度。它超乎尋常的屬性讓科學(xué)家們萌生了這樣的想法：一顆恒星被吞沒時(shí)，將它的沖量轉(zhuǎn)移給另外兩顆恒星，這兩顆恒星遂合成一顆藍(lán)色超級(jí)恒星，暢游太空，這速度，居然比太陽(yáng)公公還彪悍啊~

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