Results 151 to 160 of about 195,665 (278)

The Primordial Helium Abundance as Determined from Chemical Evolution of Irregular Galaxies

, 1993
M. J. Balbes, R. N. Boyd, Grant J. Mathews   +2 more
openalex   +1 more source

Some aspects of the chemical evolution of ⁴He in the Galaxy: the He/H radial gradient and the ΔY/ΔZ enrichment ratio [PDF]

, 2000
W. J. Maciel
openalex   +1 more source

Rapid Chemical Enrichment by Intermittent Star Formation in GN-z11

The Astrophysical Journal Letters
We interpret the peculiar supersolar nitrogen abundance recently reported by the James Webb Space Telescope observations for GN-z11 ( z = 10.6) using our state-of-the-art chemical evolution models.
Chiaki Kobayashi, Andrea Ferrara
doaj   +1 more source

Local variations of the radial metallicity gradient in a simulated NIHAO-UHD Milky Way analogue and their implications for (extra-)galactic studies

The Open Journal of Astrophysics
Radial metallicity gradients are fundamental to understanding galaxy formation and evolution. In our high-resolution simulation of a NIHAO-UHD Milky Way analogue, we analyze the linearity, scatter, spatial coherence, and age-related variations of ...
Sven Buder, Tobias Buck, Qian-Hui Chen, Kathryn Grasha   +3 more
doaj   +1 more source

The Effects of a Variable IMF on the Chemical Evolution of the Galaxy [PDF]

, 2000
C. Chiappini, F. Matteuccí
openalex   +1 more source

DIISC-IV. DIISCovery of Anomalously Low Metallicity H ii Regions in NGC 99: Indirect Evidence of Gas Inflows

The Astrophysical Journal
As a part of the Deciphering the Interplay between the Interstellar medium, Stars, and the Circumgalactic medium (DIISC) survey, we investigate indirect evidence of gas inflow into the disk of the galaxy NGC 99.
Alejandro J. Olvera, Sanchayeeta Borthakur, Mansi Padave, Timothy Heckman, Hansung B. Gim, Brad Koplitz, Christopher Dupuis, Emmanuel Momjian, Rolf A. Jansen   +8 more
doaj   +1 more source

The James Webb Space Telescope prompts a rethink of how galaxies form. [PDF]

Proc Natl Acad Sci U S A, 2023
Mann A.
europepmc   +1 more source

Chemical evolution of irregular galaxies

, 1998
10 pages, 3 figs, uses moriond.sty. Review presented at XVIIIth Rencontre de Moriond `Dwarf Galaxies and Cosmology', eds.
openaire   +2 more sources

Chemically Consistent Evolution of Galaxies on Cosmological Timescales and the DLA Galaxy Population

, 1999
U. Fritze–v. Alvensleben, U. Lindner, C. S. Möller   +2 more
openalex   +2 more sources

H [CSC]ii[/CSC] Regions and Abundances in the “Dark Galaxy” DDO 154 and the Chemical Evolution of Dwarf Irregular Galaxies [PDF]

, 2001
Robert C. Kennicutt, Evan D. Skillman
openalex   +1 more source