I JWST breaks another Redshift record

  • I
  • Thread starter Thread starter Oldman too
  • Start date Start date
  • Tags Tags
    jwst Redshift
AI Thread Summary
A recent paper highlights the discovery of a galaxy with a photometric redshift of z = 16.7, indicating its formation approximately 250 million years after the Big Bang. This finding is part of a series of records being set by the James Webb Space Telescope (JWST) as new data emerges. The study focuses on ultraviolet observations, suggesting a potential search for Population III stars. Discussions also touch on the capabilities of JWST, noting that its efficiency allows for high-resolution imaging in significantly shorter exposure times compared to the Hubble Space Telescope. Overall, JWST's advancements may redefine our understanding of early cosmic structures.
Oldman too
Messages
259
Reaction score
489
TL;DR 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"
 
  • Like
  • Love
Likes afmayer, Drakkith, ohwilleke and 3 others
Space news on Phys.org
Oldman too said:
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?
 
  • Like
Likes Oldman too and vanhees71
pinball1970 said:
Wow!
That's what I said too!
pinball1970 said:
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
pinball1970 said:
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
 
  • Like
  • Informative
Likes ohwilleke, vanhees71 and pinball1970
Abstract The Event Horizon Telescope (EHT) has significantly advanced our ability to study black holes, achieving unprecedented spatial resolution and revealing horizon-scale structures. Notably, these observations feature a distinctive dark shadow—primarily arising from faint jet emissions—surrounded by a bright photon ring. Anticipated upgrades of the EHT promise substantial improvements in dynamic range, enabling deeper exploration of low-background regions, particularly the inner shadow...
what is the current status of the field for quantum cosmology, are there any observations that support any theory of quantum cosmology? is it just cosmology during the Planck era or does it extend past the Planck era. what are the leading candidates into research into quantum cosmology and which physics departments research it? how much respect does loop quantum cosmology has compared to string cosmology with actual cosmologists?
Back
Top