Stress testing ΛCDM with high-redshift galaxy candidates.
Stress testing ΛCDM with high-redshift galaxy candidates.
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DOI:
10.1038/s41550-023-01937-7
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发表时间:
2023
期刊:
影响因子:
14.1
通讯作者:
中科院分区:
文献类型:
--
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Early data from the James Webb Space Telescope (JWST) have revealed a bevy of high-redshift galaxy candidates with unexpectedly high stellar masses. An immediate concern is the consistency of these candidates with galaxy formation in the standard ΛCDM cosmological model, wherein the stellar mass (M⋆) of a galaxy is limited by the available baryonic reservoir of its host dark matter halo. The mass function of dark matter haloes therefore imposes an absolute upper limit on the number density n (>M⋆, z) and stellar mass density ρ⋆ (>M⋆, z) of galaxies more massive than M⋆ at any epoch z. Here I show that the most massive galaxy candidates in JWST observations at z ≈ 7–10 lie at the very edge of these limits, indicating an important unresolved issue with the properties of galaxies derived from the observations, how galaxies form at early times in ΛCDM or within this standard cosmology itself. Early James Webb Space Telescope (JWST) results suggest a high level of star formation in the first 500 million years of the Universe. A study of the available mass from dark matter haloes shows that unexpectedly high-mass JWST galaxy candidates may challenge the prevailing cosmological model.
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影响因子:
64.8
作者:
Harris CR;Millman KJ;van der Walt SJ;Gommers R;Virtanen P;Cournapeau D;Wieser E;Taylor J;Berg S;Smith NJ;Kern R;Picus M;Hoyer S;van Kerkwijk MH;Brett M;Haldane A;Del Río JF;Wiebe M;Peterson P;Gérard-Marchant P;Sheppard K;Reddy T;Weckesser W;Abbasi H;Gohlke C;Oliphant TE
通讯作者:
Oliphant TE
影响因子:
64.8
作者:
Labbe, Ivo;van Dokkum, Pieter;Wang, Bingjie
通讯作者:
Wang, Bingjie
影响因子:
4.8
作者:
Mason, Charlotte A.;Trenti, Michele;Treu, Tommaso
通讯作者:
Treu, Tommaso
DOI:
10.1046/j.1365-2966.2003.07113.x
发表时间:
2003-12-01
影响因子:
4.8
作者:
Reed, D;Gardner, J;Governato, F
通讯作者:
Governato, F
影响因子:
4.9
作者:
Steinhardt, Charles. L.;Capak, Peter;Speagle, Josh S.
通讯作者:
Speagle, Josh S.