2y ago

Article proposes variant of current ΛCDM cosmological model that makes the universe twice as old

JWST early Universe observations and ΛCDM cosmology

cross-posted from: https://lemmy.ca/post/1721793

The article introduces a dynamic cosmological constant in the current ΛCDM cosmological model to account for some data from the James Webb telescope. The new model would have the age of the universe at ~27 billion years.
This is interesting. Unfortunately some popular science magazines are already presenting it as a fact...

Science @beehaw.org

stravanasu @lemmy.ca

2y ago

Article proposes variant of current ΛCDM cosmological model that makes the universe twice as old

doi.org /10.1093/mnras/stad2032

5 comments

Use this as a tool to distinguish good science sources from bad science sources. Any source that refers to this as fact should be considered unethical and untrustworthy.
I'm still waiting for a thorough breakdown from my favorite working astrophysicist, as she has promised:
https://youtube.com/shorts/EuEp8qGO5QA?feature=share
Age estimation is a tricky thing - there are no brass labels on distant galaxies showing their age, or if there are, the letters are too small to see. There are several different methods, and while there's some disagreement between them, it's on the magnitude of 0.1Gyr, not 13.7+/-13.
- Feel free to give more references about these points, I'm always happy to read more.
  
  Wikipedia is a good starting point: https://en.m.wikipedia.org/wiki/Age_of_the_universe . I'm not an expert on the topic, but if I'd like to dig deeper, I'd visit Amazon, look for cosmology books, pick something that's expansive, looks like a textbook, plus point if the title contains the word 'introduction' (you'll see the irony inside). It's the best if you find something from after 2010 (after Planck and WMAP missions). I found Weinberg: Cosmology, but that's from 2008. If you have your favorite textbook, check it out from the local library, but make sure NOT to download it from Library Genesis (http://libgen.is/ is the site to avoid) because that would cause the publisher financial losses.