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Showing 1–6 of 6 results

Advanced filters: Author: Piero Rosati Clear advanced filters

A large population of ‘Lyman-break’ galaxies in a protocluster at redshift z ≈ 4.1

George K. Miley
Roderik A. Overzier
Wei Zheng
Research01 Jan 2004
Nature

Volume: 427, P: 47-50
A magnified young galaxy from about 500 million years after the Big Bang

Gravitationally magnified images of a faint galaxy from only 500 million years after the Big Bang suggest that galaxies of that age may be the dominant source of the radiation responsible for the re-ionization of the intergalactic medium.

Wei Zheng
Marc Postman
Arjen van der Wel
Research19 Sept 2012
Nature

Volume: 489, P: 406-408
A luminous and young galaxy at z = 12.33 revealed by a JWST/MIRI detection of Hα and [O iii]

The detection of Hα reported in galaxy candidate GHZ2/GLASS-z12 provides a direct probe of star formation activity and can be used to trace massive stars with ages of ~10 Myr or younger.

Jorge A. Zavala
Marco Castellano
L. Y. Aaron Yung
ResearchOpen Access30 Oct 2024
Nature Astronomy

Volume: 9, P: 155-164
The ancestors of most massive galaxy clusters

The study of the early stages of galaxy cluster formation and their evolutionary path is critical for testing our structure-formation models and cosmological paradigm. Recent observations have pushed the detection of ‘protoclusters’ further back in time.

Piero Rosati
News & Views15 Oct 2018
Nature Astronomy

Volume: 2, P: 944-945
The nature of an ultra-faint galaxy in the cosmic dark ages seen with JWST

The JWST, with the aid of gravitational lensing, confirms the extreme distance of an ultra-faint galaxy at a redshift of 9.79, showing it to have a luminosity typical of the sources responsible for cosmic reionization and highly compact and complex morphology.

Guido Roberts-Borsani
Tommaso Treu
Rogier A. Windhorst
Research17 May 2023
Nature

Volume: 618, P: 480-483
Extreme magnification of an individual star at redshift 1.5 by a galaxy-cluster lens

An individual star at z = 1.49 is gravitationally lensed and highly magnified by a foreground galaxy cluster. Fluctuations in the star’s emission provide insight on the mass function of intracluster stars, compact objects and the presence of dark-matter subhaloes.

Patrick L. Kelly
Jose M. Diego
Benjamin J. Weiner
Research02 Apr 2018
Nature Astronomy

Volume: 2, P: 334-342