January 09, 2020
An article at Space.com says a recent paper suggests Dark Energy may be hogpoo.
From the article:
In a new study, published to the pre-print server arXiv and accepted for publication in The Astrophysical Journal, researchers from Yonsei University in Seoul, South Korea, along with collaborators at Lyon University and the Korea and Space Science Institute claim that they have found proof that dark energy might not exist at all. They studied a small sample of galaxies hosting about 30 type Ia supernovas and claim to have disproven the assumption that supernova luminosity evolves.
"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," professor Young-Wook Lee of Yonsei University, who led the study, said in a statement.
"Taken at face values, our result suggests that ~100% of the evidence for dark energy simply goes away. This will be confirmed by future observations," Lee and co-author Yijung Kang told Space.com in an email.
To come to such a bold conclusion, the researchers observed the spectra — bands of colors that can be produced when matter interacts with or emits electromagnetic radiation — of the stars in nearby galaxies that host these supernovas. Studying the light coming from these galaxies helped them to determine the ages of the stars in those galaxies.
The
team found what they reported as a significant correlation between the
luminosity of these supernovas and the ages of the stars in these galaxies.
They found that supernovas in younger galaxies are fainter than in
older galaxies, which would upend the assumption that supernova
luminosity doesn't evolve over cosmic time. So, because they found
fault with one of the main pieces of evidence for dark energy, they
concluded that there is a likelihood that dark energy may not exist at
all.
After all, we have Dark Energy to explain the apparent acceleration of the expansion of the Universe and at the same time have Dark Matter to explain the opposite. It's very Medieval; like asking how many angels can dance on the head of a pin. One starts to think that perhaps we are on the wrong track entirely.
Maybe not. But I'm always willing to keep an open mind on such things.
Posted by: Timothy Birdnow at
12:30 PM
| Comments (3)
| Add Comment
Post contains 470 words, total size 3 kb.
It still makes more sense than castigating carbon dioxide as the "greenhouse gas" that's going to bring the world to an end by Climate Change.
Posted by: Dana Mathewson at January 09, 2020 02:34 PM (nYRaQ)
Posted by: sdb at January 10, 2020 01:57 AM (JNe5D)
Posted by: Timothy Birdnow at January 10, 2020 07:08 AM (1UZYx)
37 queries taking 0.1908 seconds, 176 records returned.
Powered by Minx 1.1.6c-pink.