Results 11 to 20 of about 64,475 (321)
Stellar and Gaseous Abundances in M82 [PDF]
The Astrophysical Journal, 2004 The near infrared (IR) absorption spectra of starburst galaxies show several atomic and molecular lines from red supergiants which can be used to infer reliable stellar abundances. The metals locked in stars give a picture of the galaxy metallicity prior to the last burst of star formation. The enrichment of the new generation of stars born in the last
L. Origlia +3 more
openalex +3 more sources
ACTINIUM ABUNDANCES IN STELLAR ATMOSPHERES
Odessa Astronomical Publications, 2021 This paper presents a study of radioactive actinium in the atmospheres of stars located in galaxies with different chemical evolution history – namely, Przybylski's Star (HD 101065) in the Milky Way and the red supergiant PMMR27 in the Small Magellanic Cloud; it also reports the findings of the previous research of the red supergiant RM 1-667 in the ...
V. Yushchenko +5 more
openaire +4 more sources
The Galactic Thick Disk Stellar Abundances
The Astronomical Journal, 2021 We present first results from a program to measure the chemical abundances of a large (N>30) sample of thick disk stars with the principal goal of investigating the formation history of the Galactic thick disk. Our analysis confirms previous studies of O and Mg in the thick disk stars which reported enhancements in excess of the thin disk population.
J. X. Prochaska +4 more
openalex +4 more sources
Stellar Abundances in Local Group Galaxies [PDF]
Highlights of Astronomy, 2005 AbstractHere we describe some of our latest results from measuring detailed abundances in Local Group dwarf galaxies with the VLT. Combining spectroscopic abundances with Color-Magnitude diagrams allows the effective measurement of detailed chemical evolution with time in these galaxies.
Tolstoy, Eline, Venn, Kim
openaire +2 more sources
Stellar evolution with SMC chemical abundances [PDF]
International Astronomical Union Colloquium, 1981 Evolutionary computations are presented for massive stars between 20 Mo and 100 Mo with chemical abundances holding for the Small Magellanic Cloud, i.e. X = .76 and Z = .003. Mass loss by stellar wind is taken into account during core hydrogen burning.
P. Hellings, D. Vanbeveren
openaire +1 more source
Stellar Iron Abundances: Non‐LTE Effects [PDF]
The Astrophysical Journal, 1999 22 pages, 9 figures, 1 table, ApJ style ...
Thevenin, F., Idiart, T. P.
openaire +2 more sources
Clustering in the stellar abundance space [PDF]
Monthly Notices of the Royal Astronomical Society, 2017 15 pages, 13 figures, accepted by MNRAS, author scientific names were ...
Boesso, R., Rocha-Pinto, H. J.
openaire +2 more sources
Stellar model atmospheres with abundance stratification [PDF]
Astronomy & Astrophysics, 2009 Context. Atomic diffusion is believed to be an important physical process in the atmospheres of several types of stars. Stellar atmospheres, including the stratification of the elements due to diffusion, are then needed to properly compare theoretical results to observations for such stars. Aims.
F. Leblanc +3 more
openalex +4 more sources
The Abundance of S-Process Elements: Temporal and Spatial Trends from Open Cluster Observations
Universe, 2022 Spectroscopic observations of stars belonging to open clusters, with well-determined ages and distances, are a unique tool for constraining stellar evolution, nucleosynthesis, mixing processes, and, ultimately, Galactic chemical evolution.
Laura Magrini +8 more
doaj +1 more source
Stellar abundances of beryllium and CUBES [PDF]
, 2014 Stellar abundances of beryllium are useful in different areas of astrophysics, including studies of the Galactic chemical evolution, of stellar evolution, and of the formation of globular clusters.
Smiljanic, R.
core +2 more sources