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Astronomers from Lund University in Sweden believe they have solved a mystery discovered at the center of the Milky Way galaxy last spring.
The conundrum was the apparent finding of high levels of chemicals scandium, vanadium and yttrium near the galaxy's giant black hole – and scientists did not know where it came from.
They even went out and published a study on the apparent presence of the dramatically high level of the world, at the center of our galaxy.
At the time, various possible explanations were presented. For example, the high levels were a result of the stars being broken down into the black hole or a result of collisions of neutron stars.
However, the researchers revealed that the so-called spectral lines were actually an optical illusion.
"These giant red stars have been used most of their hydrogen fuel and their temperatures are therefore half of the sun's," said Brian Thorsbro, lead author of the study and a doctoral student in astronomy at Lund University.
According to the report, the temperature of the giant stars has been increased by the optical illusion. This means that the electrons in the elements behave different at different temperatures, which in turn can be misleading when measuring the spectral lines of elements in different stars.
The conclusion is the result of a close collaboration between astronomers and atomic physicists. The findings were uncovered thanks to the world's largest telescope at the W. Keck Observatory on Mauna Kea, Hawaii.
Using this telescope, the research team is now conducting a comprehensive mapping of the central areas of the Milky Way, exploring the spectral lines in the light of different stars.
The purpose, they say, is not to gain understanding of the events that have occurred in the history of the Milky Way, but also to understand how galaxies, in general, have formed.
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