why universe disintegrating itself dark energy may be more complex than we think research mkh | Why is the universe disintegrating itself? Dark energy may be more complex than we think
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The Dark Energy Survey is the largest effort to date to measure dark energy. More than 400 scientists from multiple continents worked together for nearly a decade to repeatedly observe parts of the southern sky.
With repeated observations we look for changes such as new exploding stars. The more often you observe, the better you can measure these changes, and the larger the area you search, the more supernovae you can find.
The first results indicating the existence of dark energy used only a few dozen supernovae. The latest results from the Dark Energy Survey used approximately 1,500 exploded stars, providing very high precision,
Using a specially built camera installed on the 4-meter Blanco telescope at the Cerro-Tololo Inter-American Observatory in Chile, the survey found thousands of supernovae of different types.
To find out which type IA is (the kind we need to measure distances), we used the 4-meter Anglo Australian Telescope at Siding Spring Observatory in New South Wales.
The Anglo Australian Telescope took measurements that broke down the colors of light from the supernova. This allows us to see the “fingerprint” of different elements in the explosion.
Type LA supernovae have some unique characteristics, such as it contains no hydrogen and silicon and with enough supernovae, machine learning helped us efficiently classify thousands of supernovae.
More complex than the cosmological constant Ultimately, after more than a decade of work and studying nearly 1,500 Type LA supernovae, the Dark Energy Survey has produced a new best measurement of W. We found that W = –0.80 ± 0.18. So it’s somewhere between –0.62 and –0.98.
This is a very interesting result. It’s close to -1, but not quite there. To be the cosmological constant, or the energy of empty space, it would need to be exactly -1.
Where does this leave us? With the idea that a more complex model of dark energy may be needed, perhaps one in which this mysterious energy is transformed into the life of the universe
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