Has JWST Already Falsified Dark-matter-driven Galaxy Formation?

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Has JWST Already Falsified Dark-matter-driven Galaxy Formation?

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Has JWST Already Falsified Dark-matter-driven Galaxy Formation?

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Astrophysical Journal Letters

ISSN

2041-8205

e-ISSN

2041-8213

Svazek periodika

939

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

7

Strana od-do

L31

Kód UT WoS článku

000884672700001

EID výsledku v databázi Scopus

2-s2.0-85142474123