4 ms·
Can we measure things like metallicity? My impression is that this shows mature looking galaxy structures indicating that those types of structures can form ver
by api 4y ago
Can we measure things like metallicity? My impression is that this shows mature looking galaxy structures indicating that those types of structures can form very early, but the stars should be very low metallicity right?
You'd also expect very few rocky planets, but that's firmly beyond the ability of JWST (and maybe anything else) to directly measure.
- negativelambda 4y agoGood point! It seems that they do not mention metallicity in this paper. However they have spectroscopic redshifts from a previous Hubble Space Telescope (HST) survey [1]. So maybe from that data the metallicity can be estimated. [1] https://iopscience.iop.org/article/10.3847/0067-0049/225/2/27 https://iopscience.iop.org/article/10.3847/0067-0049/225/2/2...