Has JWST Already Falsified Dark-matter-driven Galaxy Formation?
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F22%3A10456060" target="_blank" >RIV/00216208:11320/22:10456060 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=mHFfB_wBJx" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=mHFfB_wBJx</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3847/2041-8213/ac9a50" target="_blank" >10.3847/2041-8213/ac9a50</a>
Alternative languages
Result language
angličtina
Original language name
Has JWST Already Falsified Dark-matter-driven Galaxy Formation?
Original language description
The James Webb Space Telescope (JWST) discovered several luminous high-redshift galaxy candidates with stellar masses of M-* ? 10(9)M(?) at photometric redshifts z(phot) ? 10, which allows to constrain galaxy and structure formation models. For example, Adams et al. identified the candidate ID 1514 with log(10)(M-*/M-?) = 9.8(-0.2)(+0.2) located at z(phot) 9.85(-0.12)(+0.18) and Naidu et al. found even more distant candidates labeled as GL-z11 and GL-z13 0.18 with log(10)(M-*/M-?) = 9.4(-0.3)(+0.3 )at z(phot) = 10.9(-0.4)(+0.5) +and log(10)(M-*/M-?) = 9.0(-0.4)(+0.3 )at z(phot) = 13.1(-0.7)(+0.8), respectively. Assessing the computations of the IllustrisTNG (TNG50-1 and TNG100-1) and EAGLE projects, we investigate if the stellar mass buildup as predicted by the lambda CDM paradigm is consistent with these observations assuming that the early JWST calibration is correct and that the candidates are indeed located at z ? 10. Galaxies formed in the lambda CDM paradigm are by more than an order of magnitude less massive in stars than the observed galaxy candidates implying that the stellar mass buildup is more efficient in the early universe than predicted by the lambda CDM models. This in turn would suggest that structure formation is more enhanced at z ? 10 than predicted by the lambda CDM framework. We show that different star formation histories could reduce the stellar masses of the galaxy candidates alleviating the tension. Finally, we calculate the galaxy-wide initial mass function (gwIMF) of the galaxy candidates assuming the integrated galaxy IMF theory. The gwIMF becomes top-heavy for metal-poor star forming galaxies decreasing therewith the stellar masses compared to an invariant canonical IMF.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Astrophysical Journal Letters
ISSN
2041-8205
e-ISSN
2041-8213
Volume of the periodical
939
Issue of the periodical within the volume
2
Country of publishing house
US - UNITED STATES
Number of pages
7
Pages from-to
L31
UT code for WoS article
000884672700001
EID of the result in the Scopus database
2-s2.0-85142474123