Results 11 to 20 of about 58,855 (236)
Modeling the chemical evolution of the Galaxy halo [PDF]
Astronomy & Astrophysics, 2013 We study the chemical evolution and formation of the Galactic halo through the analysis of its stellar metallicity distribution function and some key elemental abundance patterns. Starting from the two-infall model for the Galaxy, which predicts too few low-metallicity stars, we add a gas outflow during the halo phase with a rate proportional to the ...
Francesca Matteucci +3 more
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Disk Galaxy Models Driven by Stochastic Self-Propagating Star Formation
Open Astronomy, 2010 We present a model of chemical and spectrophotometric evolution of disk galaxies based on a stochastic self-propagating star formation scenario. The model incorporates galaxy formation through the process of accretion, chemical and photometric evolution ...
Mineikis T., Vansevičius V.
doaj +3 more sources
Nitrogen isotopes in the interstellar medium: A chemical journey across the Galaxy [PDF]
EPJ Web of Conferences, 2022 One of the most important tools to investigate the chemical history of our Galaxy and our own Solar System is to measure the isotopic fractionation of chemical elements. This is the process that distributes the less abundant stable isotopes of an element
Colzi Laura +3 more
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Chemical evolution of Seyfert galaxies [PDF]
Proceedings of the International Astronomical Union, 2007 AbstractWe computed the chemical evolution of Seyfert galaxies, residing in spiral bulges, based on an updated model for the Milky Way bulge with updated calculations of the Galactic potential and of the feedback from the central supermassive black hole (BH) in a spherical approximation. We followed the evolution of bulges of masses 2 × 109 − 1011M⊙ by
S. K. Ballero +2 more
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JWST/NIRSpec Measurements of Extremely Low Metallicities in High Equivalent Width Lyα Emitters
The Astrophysical Journal, 2023 Deep Very Large Telescope/MUSE optical integral field spectroscopy has recently revealed an abundant population of ultra-faint galaxies ( M _UV ≈ −15; 0.01 L _⋆ ) at z = 2.9−6.7 due to their strong Ly α emission with no detectable continuum.
Michael V. Maseda +21 more
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Evolution of the Mass–Metallicity Relation from Redshift z ≈ 8 to the Local Universe
The Astrophysical Journal, 2023 A tight positive correlation between the stellar mass and the gas-phase metallicity of galaxies has been observed at low redshifts. The redshift evolution of this correlation can strongly constrain theories of galaxy evolution.
Danial Langeroodi +19 more
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PN-Carbon Yields and the Chemical Evolution of the Galaxy [PDF]
, 2001 Two sets of observational carbon stellar yields for low-and-intermediate mass stars are computed from planetary nebulae abundances derived from C II $\lambda4267$ and C III $\lambda\lambda1906+1909$ lines, respectively.
Leticia Carigi
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The Origin of the Nuclear Star-forming Ring in NGC 3182
The Astronomical Journal, 2023 We investigate the stellar and ionized gas kinematics, and stellar populations of NGC 3182 galaxy using integral field spectrograph data from the Calar Alto Legacy Integral Field Area survey. We try to clarify the nature of the ring structure in NGC 3182.
Mina Pak +3 more
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A 30m Large Program: The CO Line Atlas of the Whirlpool Galaxy Survey (CLAWS) [PDF]
EPJ Web of Conferences, 2022 Robust knowledge of the distribution, amount, and physical/chemical state of the cold molecular (H2) gas is key to understanding galaxy evolution. With the help of multi-CO line observations, it is possible to study the molecular gas distribution and ...
den Brok Jakob, Bigiel Frank
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Galaxy formation with radiative and chemical feedback [PDF]
, 2015 Here we introduce GAMESH, a novel pipeline which implements self-consistent radiative and chemical feedback in a computational model of galaxy formation. By combining the cosmological chemical-evolution model GAMETE with the radiative transfer code CRASH,
de Bennassuti, M. +5 more
core +3 more sources