Remember Those Impossibly Massive Galaxies? They May Be Even More Massive universetoday storybywill
The only problem is that Webb noticed more galaxies than was anticipated in this period, and some were more massive than what was thought possible. According to the LCDM model, there simply wasn’t enough time since the Big Bang for so many galaxies to have formed or become so massive. This led to all kinds of claims, including the notion that the
The stellar mass of the five galaxies, showing mass inferred using the two different methods. Credit: Giménez-Arteaga et al. , Peter Laursen . The team then compared the mass of the five galaxies using the two methods and found that the values were always much higher by analyzing them pixel-for-pixel . As for why this is the case, Arteaga and her team believe it has to do with the composition of galaxies, which is far from singular:
Proper resolution is very important for accurately estimating stellar mass, one of the main properties through which astronomers characterize galaxies. While this is relatively easy for galaxies that are relatively close to the Milky Way, it remains a challenge for far more distant ones. While the effect Arteaga and her colleagues emphasized has been noted before, it has only been with galaxies as they appear in later epochs of cosmic history.
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