ALMA telescope unveils rapid formation of new stars in distant galaxies
Galaxies forming stars at extreme rates nine billion years ago were more efficient than average galaxies today, researchers find.
A galaxy will display a burst of newly-formed stars that shine brighter than the rest. The question astronomers have been asking is whether such starbursts in the early universe were the result of having an overabundant gas supply, or whether galaxies converted gas more efficiently. A new study lead by John Silverman at the Kavli Institute for the Physics and Mathematics of the Universe, used ALMA to study carbon monoxide (CO) gas content in seven starburst galaxies far away.
The researchers found the amount of CO-emitting gas was already diminished even though the galaxy continued to form stars at high rates. These observations are similar to those recorded for starburst galaxies near Earth today, but the amount of gas depletion was not quite as rapid as expected. This led researchers to conclude there might be a continuous increase in the efficiency.
This research was published on October 2015 in The Astrophysical Journal Letters.
- ALMA telescope unveils rapid formation of new stars in distant galaxies (ALMA)
- ALMA TELESCOPE UNVEILS RAPID FORMATION OF NEW STARS IN DISTANT GALAXIES (Kavli Institute for the Physics and Mathematics of the Universe)
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