Results 31 to 40 of about 58,855 (236)
Stellar populations in gas-rich galaxy mergers I. Dependence on star formation history
, 1998 We investigate the nature of stellar populations of major galaxy mergers between late-type spirals considerably abundant in interstellar medium by performing numerical simulations designed to solve both the dynamical and chemical evolution in a self ...
Bekki, Kenji, Shioya, Yasuhiro
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The Chemical Evolution of the Draco Dwarf Spheroidal Galaxy [PDF]
, 2009 We present an abundance analysis based on high resolution spectra of 8 stars selected to span the full range in metallicity in the Draco dwarf spheroidal galaxy. We find [Fe/H] for the sample stars ranges from -1.5 to -3.0 dex.
Cohen, Judith G., Huang, Wenjin
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The Chemical Evolution of Galaxies [PDF]
Proceedings of Frank N. Bash Symposium 2015 — PoS(BASH2015), 2016 The gas-phase oxygen abundance, i.e. metallicity, of a galaxy is set by the interplay between star formation and gas flows. Metals are dispersed into the interstellar medium by stellar winds and supernovae. Metals accumulate in the interstellar medium of star-forming galaxies and provide a record of star-formation.
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Search for Extremely Metal-poor Stars with Gemini-N/Graces. I. Chemical-abundance Analysis
The Astrophysical Journal, 2023 We present stellar parameters and abundances of 13 elements for 18 very metal-poor (VMP; [Fe/H] < –2.0) stars, selected as extremely metal-poor (EMP; [Fe/H] < –3.0) candidates from the Sloan Digital Sky Survey and Large sky Area Multi-Object Fiber ...
Miji Jeong +7 more
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On the Chemical Evolution of Our Galaxy [PDF]
Publications of the Astronomical Society of Japan, 1996 We have investigated the chemical evolution of the solar neighborhood with a particular emphasis on the helium abundance and the current supernova (SN) rate, while taking into account the effects of the stellar mass loss on nucleosynthesis in stars. We found that the Scalo IMF can reproduce the solar-helium abundance as well as the current ratio of ...
Fumio Takahara, Kuniko Mihara
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INHOMOGENEITIES OF CHEMICAL COMPOSITION AND COSMOCHRONOLOGY PROBLEMS
Odessa Astronomical Publications, 2017 The problems of determination of chemical composition of stars and connection with theory of chemical evolution of Galaxy are discussed.
V. G. Klochkova, V. E. Panchuk
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The Astrophysical JournalWe present an empirical chemical evolution model that explains the distribution of metals in the interstellar medium (ISM) and the circumgalactic medium (CGM) of galaxies based on the U niverse M achine and N eutral U niverse M achine models in the ...
Moka Nishigaki +7 more
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JINA-NuGrid Galactic Chemical Evolution Pipeline
, 2016 Galactic chemical evolution is a topic that involves nuclear physics, stellar evolution, galaxy evolution, observation, and cosmology. Continuous communication and feedback between these fields is a key component in improving our understanding of how ...
Côté, Benoit +7 more
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The Astrophysical JournalGas-phase metallicity gradients are a crucial element in understanding the chemical evolution of galaxies. We use the FOGGIE simulations to study the metallicity gradients (∇ Z ) of six Milky Way–like galaxies throughout their evolution.
Ayan Acharyya +9 more
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The Astrophysical Journal Supplement Series, 2023 We present the evolution of the mass–metallicity (MZ) relation at z = 4–10 derived with 135 galaxies identified in JWST/NIRSpec data taken from the three major public spectroscopy programs of ERO, GLASS, and CEERS.
Kimihiko Nakajima +7 more
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