I JWST breaks another Redshift record

[Oldman too]

TL;DR

A new paper puts a Galaxy's Redshift at z = 16.7

A paper just out seems to describe a galaxy formed ~250 myr after the BB. One of many records that JWST will be both setting and breaking as the data pours in. With the papers focus on UV, this is probably going to be a Pop 3 star search. Section 6.2 of the paper describes the studies findings on the object in question.

https://arxiv.org/pdf/2207.12356.pdf
"Finally in addition to the other sources discussed earlier in this
work we highlight the apparent discovery of an object with a well
constrained photometric redshift of 𝑧 = 16.7L corresponding to a
time just ' 250 myr after the big bang"

 

[pinball1970]

Summary: A new paper puts a Galaxy's Redshift at z = 16.7

A paper just out seems to describe a galaxy formed ~250 myr after the BB. One of many records that JWST will be both setting and breaking as the data pours in. With the papers focus on UV, this is probably going to be a Pop 3 star search. Section 6.2 of the paper describes the studies findings on the object in question.

https://arxiv.org/pdf/2207.12356.pdf
"Finally in addition to the other sources discussed earlier in this
work we highlight the apparent discovery of an object with a well
constrained photometric redshift of 𝑧 = 16.7L corresponding to a
time just ' 250 myr after the big bang"

Wow!
What are limitations? Presumably these images are no where near the exposure time of Hubble?
Hubble took a few weeks on the famous deep field and Webb produced far higher resolution/detail of the same area in 12 hours.
Does this mean Webb spending 4 weeks on one spot will produce the deepest that can be achieved?

 

[Oldman too]

Wow!

That's what I said too!

What are limitations?

I think Webb just may push limitations to the limit, what would z = 20 look like on the cosmological timeline? https://arxiv.org/abs/2207.11558

Does this mean Webb spending 4 weeks on one spot will produce the deepest that can be achieved?

Not really sure, it doesn't look like 4 weeks of exposure would accomplish anything that 12 to 24 hours total time won't do. As for one spot, with the micro-shutter system, this is one multitasking telescope, roughly 250,000 independent shutters means a lot of targets can be simultaneously studied.
https://jwst-docs.stsci.edu/jwst-ne...nstrumentation/nirspec-micro-shutter-assembly