New evidence claims key assumption made in the discovery of dark energy is in error

[gary]

A 5 January 2020 press release (https://astro.yonsei.ac.kr/galaxy/galaxy01/research.do?mode=view&articleNo=78249&article.offset=0&articleLimit=10) from the Department of Astronomy
at Yonsei University in Seoul describes new observations that the
researchers claim puts doubt on the accelerating universe observations
and with it, the existence of dark energy.




Press Release and Figure 1 here :-
https://astro.yonsei.ac.kr/galaxy/galaxy01/research.do?mode=view&articleNo=78249&article.offset=0&articleLimit=10

"Early-type Host Galaxies of Type Ia Supernovae. II. Evidence for Luminosity Evolution in Supernova Cosmology" by Kang et. al. 20 Dec 2019
at arXiv :-
https://arxiv.org/pdf/1912.04903.pdf
https://arxiv.org/abs/1912.04903

[DarkArts]

Interesting reads. Thanks for posting. :thumbsup:

[multiweb]

That's a pretty big deal.

[foc]

Thanks for posting!
It would be great if we can soon have some consensus on dark matter and dark energy. I assume evidence dark matter is still fairly solid, if indirect with some supporting indications from recent new particle detection work, but I would be happy to 'see' the back of dark energy, as long as it is not replaced with another fudge factor quantity.

[Shiraz]

another great thread - thanks Gary.

so the Oxford group (your previous dark energy thread) are OK with the 1a expansion data (I guess), but think that the acceleration analysis was faulty. The Korean group (this thread) thinks that 4 different studies show that the standard 1a candles are evolving, so the expansion data itself may be faulty.

interesting times. thanks and cheers Ray

FWIW, this summary is a bit old, but it seems to give a glimpse into just how difficult studies can be at the cutting edge in this field. https://physicsworld.com/a/the-dark-energy-deniers/

[Shiraz]

FWIW, questions raised on the quality of the study..https://www.space.com/dark-energy-not-debunked.html

[gary]

Hi Ray,

Thanks for both links! :)

Best Regards

Gary

[multiweb]

+1 Good link Ray. It's so hard now to know or understand the validity of data.