Evidence that the key assumption made in discovery of dark energy is in error
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Re: Evidence that the key assumption made in discovery of dark energy is in error
#2"...Prof. Young-Wook Lee (Yonsei Univ., Seoul), who led the project said, "Quoting Carl Sagan, extraordinary claims require extraordinary evidence, but I am not sure we have such extraordinary evidence for dark energy. Our result illustrates that dark energy from SN cosmology, which led to the 2011 Nobel Prize in Physics, might be an artifact of a fragile and false assumption.""
Is he implying that other cosmologists have proceeded as if dark energy is well evidenced?
Re: Evidence that the key assumption made in discovery of dark energy is in error
#3> Taken at face values, the luminosity evolution of SN is significant enough to question the very existence of dark energy. When the luminosity evolution of SN is properly taken into account, the team found that the evidence for the existence of dark energy simply goes away
Cosmology is great because there's still so much in flux. There are so many fundamental things that are still in active research. I find it all very exciting.
Re: Evidence that the key assumption made in discovery of dark energy is in error
#4So... Big Rip is postponed indefinitely?
Re: Evidence that the key assumption made in discovery of dark energy is in error
#5"...Prof. Young-Wook Lee (Yonsei Univ., Seoul), who led the project said, "Quoting Carl Sagan, extraordinary claims require extraordinary evidence, but I am not sure we have such extraordinary evidence for dark energy. Our result illustrates that dark energy from SN cosmology, which led to the 2011 Nobel Prize in Physics, might be an artifact of a fragile and false assumption."" Is he implying that other cosmologists…
It is my impression that dark energy is generally accepted in cosmology. Whether that counts as "proceeding as if dark energy is well evidenced" is perhaps a different question. If everyone believes it's there, but nobody knows what it is, well... there was still something that convinced them that it was there. That something should be evidence. Is it enough to count as "well evidenced"? Perhaps not, especially if this new study is correct that one piece of the evidence does not actually support dark energy.
Re: Evidence that the key assumption made in discovery of dark energy is in error
#6So... Big Rip is postponed indefinitely?
I thought there was little reason to expect a big rip, because it requires assumptions about an increasing cosmological constant, which there’s no evidence for.
Re: Evidence that the key assumption made in discovery of dark energy is in error
#7https://xkcd.com/955/ comes to mind.
I am going to wait to get excited about this until it is replicated by others.
Re: Evidence that the key assumption made in discovery of dark energy is in error
#8"...Prof. Young-Wook Lee (Yonsei Univ., Seoul), who led the project said, "Quoting Carl Sagan, extraordinary claims require extraordinary evidence, but I am not sure we have such extraordinary evidence for dark energy. Our result illustrates that dark energy from SN cosmology, which led to the 2011 Nobel Prize in Physics, might be an artifact of a fragile and false assumption."" Is he implying that other cosmologists…
This doesn't really address your point, but the 2011 physics Nobel [1] said that "What is known is that dark energy constitutes about three quarters of the Universe."
Not saying the Nobel write-ups constitute evidence, but dark energy has certainly been popular, at least.
1 = https://www.nobelprize.org/prizes/physics/2011/press-release...
Re: Evidence that the key assumption made in discovery of dark energy is in error
#9So... Big Rip is postponed indefinitely?
I thought there was little reason to expect a big rip, because it requires assumptions about an increasing cosmological constant, which there’s no evidence for.
What do you mean? There's lots of evidence that the expansion of the universe is accelerating and that's the whole reason we believe that dark energy exists. Most cosmologists do believe we're heading for a big rip.
Re: Evidence that the key assumption made in discovery of dark energy is in error
#10Read more about the Primer Fields.