Tag: #cosmology

ArXiv preprint claims axion early dark energy model raises Hubble constant to 71.6, easing Hubble tension

Unreviewed arXiv preprint reports an axion early dark energy fit to CMB, DESI and JWST data gives H0 = 71.58 ± 1.05 km/s/Mpc, largely easing the Hubble tension.

#cosmology, #hubble-tension, #early-dark-energy, #arxiv

Possible detection of cold molecular gas in REBELS-25, 700 million years after the Big Bang

Astronomers report a possible low-J CO detection in galaxy REBELS-25 at z=7.31, implying a huge cold molecular gas reservoir 700 million years after the Big Bang.

#astronomy, #galaxies, #cosmology, #moleculargas

Webb Measures Massive Black Hole in Tiny Galaxy 700 Million Years After Big Bang

Webb's NIRSpec mapped gas in a z=7.04 'Little Red Dot', finding a 10^7–10^8 solar-mass black hole that may outweigh its primitive host.

#astronomy, #blackhole, #jameswebb, #cosmology, #earlyuniverse

LIGO-Virgo-KAGRA releases GWTC-5.0, expanding gravitational-wave catalog to 390 events

LVK's GWTC-5.0 adds 150 compact-binary candidates from O4b, raising the catalog to 390 events and improving population studies, Hubble estimates and GR tests.

#gravitational-waves, #ligo, #astronomy, #cosmology

Preprint claims first detection of 'moving lens' effect in CMB at 4.8σ

An arXiv preprint reports a 4.8σ detection of the 'moving lens' effect in the CMB using ACT and DESI, a claimed new probe of transverse cosmic velocities.

#cosmology, #cmb, #act, #desi, #astrophysics

Preprint: CHIME Fast Radio Bursts Trace Diffuse Baryons Across the Cosmic Web

A new preprint uses dispersion from 3,455 CHIME fast radio bursts to statistically link FRB sightlines with maps of hot gas and galaxies, probing diffuse baryons.

#frb, #astrophysics, #cosmology, #chime, #baryons

Wide JWST Survey Finds Fewer Galaxies at z≈10, Bringing Counts Closer to Spectroscopy

A 36-sightline JWST NIRCam survey reports lower galaxy counts near redshift 10 than earlier photometric studies, aligning better with spectroscopic results.

#jwst, #astronomy, #galaxies, #cosmology

DESI completes five-year survey; will continue through 2028 to probe dark energy

The Dark Energy Spectroscopic Instrument finished its original five‑year survey, mapping 47M+ objects. DESI will continue through 2028 to test whether dark energy evolves.

#astronomy, #darkenergy, #cosmology, #desi