Results 131 to 140 of about 102,173 (261)

Contribution of AGN to the Morphological Parameters of Their Host Galaxies up to Intermediate Redshifts of z ∼ 2

open access: yesGalaxies
The presence of Active Galaxy Nuclei (AGN) can affect the morphological classification of galaxies. This work aims to determine how the contribution of AGN affects the most-used morphological parameters down to the redshift of z ∼ 2 in COSMOS-like ...
Tilahun Getachew-Woreta   +6 more
doaj   +1 more source

Metallicity Gradients in Modern Cosmological Simulations. I. Tension between Smooth Stellar Feedback Models and Observations

open access: yesThe Astrophysical Journal
The metallicity of galaxies, and its variation with galactocentric radius, provides key insights into the formation histories of galaxies and the physical processes driving their evolution.
Alex M. Garcia   +16 more
doaj   +1 more source

New High-Redshift Radio Galaxies from the MIT–Green Bank Catalog [PDF]

open access: bronze, 1999
Daniel Stern   +6 more
openalex   +1 more source

Halo mass functions at high redshift

open access: yesThe Open Journal of Astrophysics
Recent JWST observations of very early galaxies, at $z \geq 10$, has led to claims that tension exists between the sizes and luminosities of high-redshift galaxies and what is predicted by standard ${\Lambda}$CMD models.
Hannah O'Brennan   +5 more
doaj   +1 more source

The Average Stellar Population Age and Metallicity of Intermediate-redshift Quiescent Galaxies

open access: yesThe Astrophysical Journal
The HectoMAP spectroscopic survey provides a unique mass-limited sample of more than 35,000 quiescent galaxies ( D _n 4000 > 1.5) covering the redshift range 0.2  10 ^11 M _⊙ ) assemble the bulk of their stars at earlier epochs.
Ivana Damjanov   +2 more
doaj   +1 more source

The structure and composition of high redshift radio galaxies

open access: green, 1998
R. A. E. Fosbury   +6 more
openalex   +2 more sources

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