Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Detection of Black Holes01:10

Detection of Black Holes

Although black holes were theoretically postulated in the 1920s, they remained outside the domain of observational astronomy until the 1970s.
Their closest cousins are neutron stars, which are composed almost entirely of neutrons packed against each other, making them extremely dense. A neutron star has the same mass as the Sun but its diameter is only a few kilometers. Therefore, the escape velocity from their surface is close to the speed of light.
Not until the 1960s, when the first neutron...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same journal

Accurate determination of chemical abundances near a supermassive black hole.

Nature astronomy·2026
Same journal

Spatial variation of energy transport mechanisms within solar flare ribbons.

Nature astronomy·2026
Same journal

Multiple outflows and delayed ejections revealed by early imaging of novae.

Nature astronomy·2026
Same journal

Evidence for small-scale torsional Alfvén waves in the solar corona.

Nature astronomy·2026
Same journal

Europa's ice thickness and subsurface structure characterized by the Juno microwave radiometer.

Nature astronomy·2026
Same journal

Dynamical dark energy in light of the DESI DR2 baryonic acoustic oscillations measurements.

Nature astronomy·2025

Related Experiment Video

Updated: Jun 30, 2026

Expedited Radiation Biodosimetry by Automated Dicentric Chromosome Identification ADCI and Dose Estimation
10:33

Expedited Radiation Biodosimetry by Automated Dicentric Chromosome Identification ADCI and Dose Estimation

Published on: September 4, 2017

15.8K

Stress testing ΛCDM with high-redshift galaxy candidates.

Michael Boylan-Kolchin1

  • 1Department of Astronomy, The University of Texas at Austin, Austin, TX USA.

Nature Astronomy
|June 23, 2023
PubMed
Summary

Early galaxies observed by the James Webb Space Telescope (JWST) possess unexpectedly high stellar masses. These findings challenge the standard Lambda Cold Dark Matter (ΛCDM) cosmological model and our understanding of early galaxy formation.

Keywords:
CosmologyGalaxies and clusters

More Related Videos

The Lambda Select cII Mutation Detection System
07:08

The Lambda Select cII Mutation Detection System

Published on: April 26, 2018

8.0K
Far-Red Fluorescent Senescence-Associated β-Galactosidase Probe for Identification and Enrichment of Senescent Tumor Cells by Flow Cytometry
14:01

Far-Red Fluorescent Senescence-Associated β-Galactosidase Probe for Identification and Enrichment of Senescent Tumor Cells by Flow Cytometry

Published on: September 13, 2022

4.8K

Related Experiment Videos

Last Updated: Jun 30, 2026

Expedited Radiation Biodosimetry by Automated Dicentric Chromosome Identification ADCI and Dose Estimation
10:33

Expedited Radiation Biodosimetry by Automated Dicentric Chromosome Identification ADCI and Dose Estimation

Published on: September 4, 2017

15.8K
The Lambda Select cII Mutation Detection System
07:08

The Lambda Select cII Mutation Detection System

Published on: April 26, 2018

8.0K
Far-Red Fluorescent Senescence-Associated β-Galactosidase Probe for Identification and Enrichment of Senescent Tumor Cells by Flow Cytometry
14:01

Far-Red Fluorescent Senescence-Associated β-Galactosidase Probe for Identification and Enrichment of Senescent Tumor Cells by Flow Cytometry

Published on: September 13, 2022

4.8K

Area of Science:

  • Cosmology
  • Galaxy Formation and Evolution
  • Astrophysics

Background:

  • Early data from the James Webb Space Telescope (JWST) reveal high-redshift galaxy candidates with high stellar masses.
  • The standard Lambda Cold Dark M atter (ΛCDM) model posits that galaxy stellar mass is limited by the baryonic reservoir of its host dark matter halo.

Purpose of the Study:

  • To assess the consistency of JWST-identified high-redshift galaxy candidates with the ΛCDM cosmological model.
  • To investigate potential issues with observed galaxy properties, early galaxy formation theories, or the ΛCDM model itself.

Main Methods:

  • Comparison of observed stellar masses of high-redshift galaxy candidates with theoretical upper limits imposed by the dark matter halo mass function within the ΛCDM model.
  • Analysis of number density and stellar mass density of galaxies at z ≈ 7-10.

Main Results:

  • The most massive galaxy candidates identified by JWST at z ≈ 7-10 are at the extreme upper limits of predicted stellar masses within the ΛCDM model.
  • This suggests a potential tension between JWST observations and the standard cosmological model.

Conclusions:

  • The high stellar masses of early JWST galaxies present a significant challenge to the standard ΛCDM cosmology or our understanding of early galaxy formation.
  • Further investigation is required to resolve the discrepancy between observations and theoretical predictions.