科學家發現一個巨大的黑洞,否定增長理論

SYDNEY (Reuters) - Scientists say they have discovered a black hole so big that it challenges the theory about how they grow.

悉尼（路透社）——科學家們說，他們發現了一個非常巨大的黑洞，以至於挑戰了舊的增長理論。

But with measurements indicating it is 12 billion times the size of the Sun, the black hole challenges a widely accepted hypothesis of growth rates.

但是，測量數據表明，它的體積相當於120億個太陽，這個黑洞挑戰了已被接受的黑洞增長假說。

"Based on previous research, this is the largest black hole found for that period of time," Dr Fuyan Bian, Research School of Astronomy and Astrophysics, Australian National University (ANU), told Reuters on Wednesday.

澳大利亞國家大學天文學與天體物理學研究員邊富陽博士說，"基於先前的研究，這是在那個時間點發現的最大的黑洞，"

"Current theory is for a limit to how fast a black hole can grow, but this black hole is too large for that theory."

"依據當前的理論，黑洞的增長速度是有極限的，但是，這個黑洞太大了，以致超越了這個極限。"

The creation of supermassive black holes remains an open topic of research. However, many scientists have long believed the growth rate of black holes was limited.

這個特大黑洞的發現在科研界得到持續的關注。然而，很多科學家依然相信黑洞增長速度存在極限。

Black holes grow, scientific theory suggests, as they absorb mass. However, as mass is absorbed, it will be heated creating radiation pressure, which pushes the mass away from the black hole.

黑洞會增長，科學理論認爲，是來自於他吸引物質的能力。然而，物質被吸收，會導致高溫，產生輻射壓強，反而導致物質遠離黑洞。

"Basically, you have two forces balanced together which sets up a limit for growth, which is much smaller than what we found," said Bian.

"基本上，由於引力斥力最終平衡，從而使體積增長存在上限，這個上限比我們發現的這個黑洞要小得多。"

The black hole was discovered a team of global scientists led by Xue-Bing Wu at Peking University, China, as part of the Sloan Digital Sky Survey, which provided imagery data of 35 percent of the northern hemisphere sky.

這個黑洞是被北京大學吳學兵所領導的國際科研團隊發現的，這個團隊是史隆數位巡天計劃的一部分，這個計劃提供了整個北星空35%的影像數據。

The ANU is leading a comparable project, known as SkyMapper, to carry out observations of the Southern Hemisphere sky.

澳大利亞國立大學也在主導一個類似的工程，叫做SkyMapper，製作整個南星空的影像數據。

Bian expects more black holes to be observed as the project advances.

邊博士希望在這個工程中會發現更多黑洞。