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Victorious dwarfs

Victorious dwarfs

作者:殷踣  时间:2019-03-08 07:15:05  人气:

A GALAXY in which stellar dwarfs seem to have conquered the giants has left astronomers puzzled about how large stars form. James Graham of the University of California at Berkeley and his colleagues used the Hubble Space Telescope to look at a galaxy that lies 40 million light years away in the constellation Draco. The galaxy has a similar shape to our own, with a dim halo surrounding a bright disc. The team expected to observe hundreds of individual, big stars in the halo. But they were in for a surprise. “We saw only one star,” Graham announced at this week’s meeting of the American Astronomical Society in Austin. He speculates that something in the halo—possibly dark matter—might somehow be stopping massive stars forming. “That’s astronomical heresy,