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A remote galaxy might harbor a type of black hole that arises directly from a massive cloud of gas rather than forming after the death of a star. This rare specimen could explain how some galaxies built gargantuan black holes in the first billion years or so after the Big Bang.
The galaxy,
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, known as CR7,
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, is unusual (SN: 7/25/2015,
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, p. . It blasts out more ultraviolet radiation than other galaxies that lived at the same time, roughly 13 billion years ago (about 800 million years after the Big Bang). The gas in CR7 also appears to lack elements such as carbon and oxygen, which are forged within stars and then ejected into space.? One idea is that CR7 is giving birth to first-generation stars,
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, similar to the first stars ever created in the universe. Another hypothesis is that CR7 harbors the first known “direct collapse” black hole,
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, one that forms when a blob of interstellar gas collapses under its own weight without first forming stars.
A black hole is more likely,
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, suggest Aaron Smith of the University of Texas at Austin and colleagues in the Aug. 11 Monthly Notices of the Royal Astronomical Society. The researchers developed computer simulations that explore how interstellar gas interacts with the harsh radiation from primordial stars or a large black hole. Smith and colleagues find that the light from a cache of hot, young stars can’t explain why a parcel of gas is racing away from CR7 at about 580,
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,000 kilometers per hour. What

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