“Game changing” release of Type Ia Supernovae data may hold key to the history of the Universe
https://www.eurekalert.org/news-releases/1073761
“Game changing” release of Type Ia Supernovae data may hold key to the history of the Universe
https://www.eurekalert.org/news-releases/1073761
2 Comments
This is exciting. I’m ready to never hear about it again.
>ZTF’s depth and survey strategy enable researchers to detect nearly four per night. In only two and a half years, ZTF has doubled the number available Type Ia Supernovae for cosmology acquired for the last 30 years to almost three thousand.
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>”With this large and homogeneous dataset, we can explore Type Ia supernovae with an unprecedented level of precision and accuracy. This is a crucial step toward honing the use of Type Ia Supernovae in cosmology and assess if current deviations in cosmology are due to new fundamental physics or unknown problem in the way we derive distances.”
>[…]
>One of the key outcomes of these studies is that Type Ia Supernovae intrinsically vary as a function of their host environment, more so than expected before, and the correction mechanism assumed so far has to be revisited. This could change how we measure the expansion history of the Universe and may have important consequences for current deviation observed in the standard model of cosmology.
This will take some time to be analyzed, but may be used in another measurement of the Hubble Constant to avert (or deepen) the “Crisis in Cosmology”, discrepancies between measurement methods of the universe’s expansion rate.