New spectrograph shows how quasars were born in a young universe

The researchers hope that a new, deeper level of research will help answer questions about

the origin of not only metals in the Universe, but also the stars themselves.

Iron is one of the most important elements for life.But details of the exact origins of iron and other important metals such as magnesium remain unknown. The study of the origin of metals is associated with the birth of the first stars several hundred million years after the Big Bang.

Research Fellow Hiroaki Sameshima of the InstituteAstronomy University of Tokyo came to the conclusion that the existing instruments for studying this aspect of astronomy are not enough and a new instrument is needed. Previous studies in visible light were limited to astronomical bodies 4 billion years old. Their new instrument, sensitive to near infrared light, will open up possibilities for observing distant quasars - the high-energy, ancient galactic nuclei. They emitted light when the universe was only 2.4 billion years old.

With the WINERED instrument installed on a large telescope,we will be able to look into the distant past and observe more distant and ancient astronomical objects than those that were in previous studies. We have access to the details of quasars, which are already 10 billion. WINERED is a special kind of spectrograph that reads chemical signatures in the light of distant bodies. He showed traces of iron and magnesium in the light of distant quasars. This made it possible to calculate the number of these elements when the universe was much younger.

Hiroaki Sameshima of the University of Tokyo Astronomy Institute

Now that researchers have developed a newthe method of direct study of the content of metals in the early Universe, they face a new challenge. The methodology needs to be improved and empowered to collect more data. With them, astronomers can create theories that explain the origin of various metals in the universe.

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