Eine neue Art, das Universum zu lesen, könnte das Verständnis der kosmischen Expansion und der dunklen Energie schärfen

From the article:

„An international team led by researchers at the Institute of Cosmos Sciences of the University of Barcelona (ICCUB) has developed a new method that could significantly improve our understanding of the expansion of the universe and the nature of dark energy.

The study, published in Nature Astronomy, presents a powerful framework called CIGaRS that allows scientists to extract more information from exploding stars known as Type Ia supernovae, primarily through imaging rather than costly spectroscopic observations. The results pave the way for making the most of the vast amount of data expected from the next generation of astronomical surveys, especially from the Vera C. Rubin Observatory.

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Type Ia supernovae are the explosive deaths of white dwarf stars. Since they tend to explode with almost the same intrinsic brightness, astronomers use them as „standard candles“: by comparing their known true brightness with their apparent brightness from Earth, scientists can measure cosmic distances.

This technique was key to discovering that the expansion of the universe is accelerating, a phenomenon attributed to dark energy, one of the biggest mysteries of modern physics. However, there is a catch: not all Type Ia supernovae are exactly the same.“