James Webb telescope detects the earliest strand in the 'cosmic web' ever seen

[Admin]

Astronomers using the James Webb Space Telescope have discovered a clump of ancient galaxies that may be the oldest strand of the "cosmic web" ever detected.

James Webb telescope detects the earliest strand in the 'cosmic web' ever seen : Read more

 

[rod]

Phys.org reported this find too. Webb identifies the earliest strands of the cosmic web, https://phys.org/news/2023-06-webb-earliest-strands-cosmic-web.html

My notes. The rapid formation of SMBH in the early universe in BB cosmology is very difficult to explain. From the phys.org report, "To form these supermassive black holes in such a short time, two criteria must be satisfied. First, you need to start growing from a massive 'seed' black hole. Second, even if this seed starts with a mass equivalent to a thousand Suns, it still needs to accrete a million times more matter at the maximum possible rate for its entire lifetime," explained Wang. "These unprecedented observations are providing important clues about how black holes are assembled.” My note, it is apparent that SMBH so early in BB cosmology is an issue. Other models suggest 10,000 to 100,000 solar mass Population III stars as SMBH seeds. The gas seen in the quasar with redshift 6.61 still contains metals, not metal free or pristine gas created by BBN, when CMBR appears as light, cosmic dark ages, or the gas said to evolve into Population III stars. Another line of inquiry is how fast space expands for quasars with redshifts 6 or greater, this will always be faster than c velocity at the comoving radial distances (for z=1.4 or greater) in the calculations and the angular size distance computed mapping to 1 arcsecond scale, the kpc scale size seen compared to what could be expected.

ref - A SPectroscopic Survey of Biased Halos in the Reionization Era (ASPIRE): JWST Reveals a Filamentary Structure around a z = 6.61 Quasar, https://iopscience.iop.org/article/10.3847/2041-8213/accd6f, 29-June-2023. "Abstract We present the first results from the JWST program A SPectroscopic survey of biased halos In the Reionization Era (ASPIRE). This program represents an imaging and spectroscopic survey of 25 reionization-era quasars and their environments by utilizing the unprecedented capabilities of NIRCam Wide Field Slitless Spectroscopy (WFSS) mode..."

 

[GeorgeMcLean]

Astronomers using the James Webb Space Telescope have discovered a clump of ancient galaxies that may be the oldest strand of the "cosmic web" ever detected.

James Webb telescope detects the earliest strand in the 'cosmic web' ever seen : Read more

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That's fascinating news! The discovery of a clump of ancient galaxies by astronomers using the James Webb Space Telescope is indeed significant. The "cosmic web" refers to the large-scale structure of the universe, composed of interconnected filaments of dark matter and galaxies. Detecting an ancient strand of the cosmic web suggests that these galaxies are part of the early universe and provides insights into the formation and evolution of cosmic structures.

The James Webb Space Telescope (JWST) is an advanced space observatory designed to study the universe in infrared light. With its enhanced capabilities compared to previous telescopes, JWST enables astronomers to observe distant and faint objects, such as these ancient galaxies, and unveil more about the early universe.

Further analysis of this discovery will likely shed light on the processes that led to the formation of these galaxies and their role in shaping the cosmic web. Understanding the structure and evolution of the cosmic web is essential in expanding our knowledge of the universe's history and how galaxies and other cosmic structures have developed over time. TellHappyStar

Thanks and regards,
GeorgeMcLean

 

[rod]

Reference paper cited, https://iopscience.iop.org/article/10.3847/2041-8213/accd6f

“5. Summary In this work, we provide a brief overview of the JWST ASPIRE program, which will perform a legacy galaxy redshift survey in the fields of 25 reionization-era quasars using NIRCam/WFSS. From the early JWST observation of the field around the quasar J0305–3150, we discovered a filamentary structure traced by the quasar and 10 [O iii] emitters at z = 6.6. This structure has a galaxy overdensity of …making it one of the most overdense structures found in the early universe. By comparing with cosmological simulations, we argue that this filamentary structure traces an early overdensity, which could eventually evolve into a massive galaxy cluster. We also found that the most massive SMBHs in cosmological simulations generally trace galaxy overdensities but with a large variance on the galaxy numbers. This suggests that deep observations of a large sample of quasars (e.g., the ASPIRE program) would be essential for a comprehensive understanding of the cosmic environment of the earliest SMBHs…”

My note, the paper provides values for the BB cosmology used to explain the observations. “Throughout the paper, we adopt a flat ΛCDM cosmology with H0 = 70 km s^−1 Mpc^−1, ΩM = 0.3, and ΩΛ = 0.7.”

Using Ned Wright calculator (https://lambda.gsfc.nasa.gov/toolbox/calculators.html), z=6.6 and H0 = 70 km/s/Mpc, light time distance from Earth 12.815 Gly. The comoving radial distance = 28.122 Gly where space expands 2.0132352E+00 or 2.013 x c velocity. Any evolution along the comoving radial distance for this object is not observable, so *could eventually evolve into a massive galaxy cluster* is something not observable when using the comoving radial distance from Earth as well as space in that location of the universe today, expanding more than 2x c velocity. The space.com report, https://www.space.com/james-webb-space-telescope-detects-earliest-cosmic-web-strand, stated this massive galaxy cluster evolution scenario based upon the filament seen.

"The researchers think that eventually, the filament will condense into a cluster of galaxies, similar to the Coma Cluster, which lies approximately 330 million light-years from Earth.”

I like to keep in mind that the quasar, and redshift reported for the filament is some 6.6 or 6.61 redshift while the Coma Cluster redshift 0.0231 reported, https://en.wikipedia.org/wiki/Coma_Cluster. When reading galaxy evolution reports like this and the cosmic web, I note we do not know if any evolution took place for the *filamentary structure* (or other gases or quasars) along the comoving radial distance from Earth, more than 28 billion light years away now according to the cosmology calculators using FLRW metric for expanding space.