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Showing 1–4 of 4 results

Advanced filters: Author: Vasily Kokorev Clear advanced filters

Identification of more than 40 gravitationally magnified stars in a galaxy at redshift 0.725

Using JWST, more than 40 individual stars have been detected in a distant galaxy, dating back to when the Universe was only half of its current age. The stars appear to be red (super)giants that are magnified by factors of hundreds.

Yoshinobu Fudamoto
Fengwu Sun
Siwei Zou
Research06 Jan 2025
Nature Astronomy

Volume: 9, P: 428-437
Bound star clusters observed in a lensed galaxy 460 Myr after the Big Bang

JWST observations of the Cosmic Gems arc resolve the light of an infant galaxy into five gravitationally bound star clusters located in a region smaller than 70 pc.

Angela Adamo
Larry D. Bradley
Yoichi Tamura
ResearchOpen Access24 Jun 2024
Nature

Volume: 632, P: 513-516
A high black-hole-to-host mass ratio in a lensed AGN in the early Universe

JWST/NIRSpec observations of Abell2744-QSO1 show a high black-hole-to-host mass ratio in the early Universe, which indicates that we are seeing the black hole in a phase of rapid growth, accreting at 30% of the Eddington limit.

Lukas J. Furtak
Ivo Labbé
Christina C. Williams
Research14 Feb 2024
Nature

Volume: 628, P: 57-61
Most of the photons that reionized the Universe came from dwarf galaxies

An analysis of eight ultra-faint galaxies during the epoch of reionization with absolute magnitudes between −17 mag and −15 mag shows that most of the photons that reionized the Universe come from dwarf galaxies.

Hakim Atek
Ivo Labbé
Katherine E. Whitaker
Research28 Feb 2024
Nature

Volume: 626, P: 975-978