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I know the team that did this. In fact i was listening to their seminar just a few days ago. They are very careful and have been working on this a long time. On
by negativelambda 10mo ago
I know the team that did this. In fact i was listening to their seminar just a few days ago. They are very careful and have been working on this a long time. One caveat that they readily admit is that the sample used to create the luminosity age relation has some biases such as galaxy type and relatively lower redshift. They will be updating their results with the Rubin LSST data in the next few years.
Exciting times in cosmology after decades of a standard LCDM model.
- nabakin 10mo agoIs there a recording of their seminar anywhere?
- negativelambda 10mo agoIts not publicly available. Maybe for the best haha. The speaker at some point went on a bit of a tirade against many people in the supernovae cosmology community. I think he endured many years of being ignored or belittled.
- ChrisMarshallNY 10mo agoDid he yell "They LAUGHED at me at Heidelberg! They said I was mad. MAD!"? It is a very fundamental shift, though. The whole "Dark Energy/Matter" hypothesis has always seemed to me, to be a bit of a "Here, there be dragonnes" kind of thing, but I am nowhere near the level of these folks, so I have always assumed they know a lot that I don't.
- kulahan 10mo agoIt is, but that’s also kinda the point. It’s just a variable to stand in for “whatever tf mass we’ve been missing this whole time” or what-have-you.
- tekla 10mo agoI've never really gotten this criticism. Science has worked on "here be dragons" ever since it became a "thing". Neutrinos took like 40 years to discover after experiments earlier showed that either all of modern particle physics was wrong, or there was something that we couldn't see.
- ChrisMarshallNY 10mo agoIt wasn't a criticism. At least, not from me. It was just an observation.
- ngold 10mo agoJust curious, is this dark matter holding back the universal expansion?
- madaxe_again 10mo agoOur best guess is “maybe?”
- JumpCrisscross 10mo ago> after decades of a standard LCDM model Could you help me understand this sentence: "After correcting for this age bias as a function of redshift, the SN data set aligns more closely with the cold dark matter (CDM) model”?
- mr_mitm 10mo agoThe CDM model has no dark energy, unlike the LCDM model. The L stands for Lambda, which is the dark energy term in the Einstein equations. So they are saying when accounting for this effect, our universe looks more like a universe without dark energy, at least when only considering the supernovae probe.
- negativelambda 10mo agoThat's only if you consider the supernovae data alone. In combination with other probes like BAO, etc, the combined data are pointing to a Universe with a dynamical (or time varying) dark energy model.