Results 1 to 10 of about 591,980 (332)
The Interaction Between Accretion from the Interstellar Medium and Accretion from the Evolved Binary Component in Barium Stars [PDF]
Journal of Astronomy and Space Sciences, 2018 The reanalysis of the previously published abundance pattern of mild barium star HD202109 (ζ Cyg) and the chemical compositions of 129 thin disk barium stars facilitated the search for possible correlations of different stellar parameters with second ...
Yeuncheol Jeong +2 more
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Chemical Composition of RM_1-390 - Large Magellanic Cloud Red Supergiant [PDF]
Journal of Astronomy and Space Sciences, 2017 A high resolution spectroscopic observation of the red supergiant star RM_1-390 in the Large Magellanic Cloud was made from a 3.6 m telescope at the European Southern Observatory. Spectral resolving power was R=20,000, with a signal-to-noise ratio S/N >
Alexander V. Yushchenko +5 more
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Magellanic Clouds Cepheids: Thorium Abundances [PDF]
Journal of Astronomy and Space Sciences, 2018 The analysis of the high-resolution spectra of 31 Magellanic Clouds Cepheid variables enabled the identification of thorium lines. The abundances of thorium were found with spectrum synthesis method. The calculated thorium abundances exhibit correlations
Yeuncheol Jeong +5 more
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Nucleosynthesis, Mixing Processes, and Gas Pollution from AGB Stars
Universe, 2022 We discuss the evolution of stars through the asymptotic giant branch, focusing on the physical mechanisms potentially able to alter the surface chemical composition and on how changes in the chemistry of the external regions affect the physical ...
Paolo Ventura +6 more
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Fe I and Fe II Abundances of Solar-Type Dwarfs in the Pleiades Open Cluster [PDF]
, 2010 We have derived Fe abundances of 16 solar-type Pleiades dwarfs by means of an equivalent width analysis of Fe I and Fe II lines in high-resolution spectra obtained with the Hobby - Eberly Telescope and High Resolution Spectrograph.
Adele L. Plunkett +7 more
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Close Binaries and the Abundance Discrepancy Problem in Planetary Nebulae
Galaxies, 2018 Motivated by the recent establishment of a connection between central star binarity and extreme abundance discrepancies in planetary nebulae, we have carried out a spectroscopic survey targeting planetary nebula with binary central stars and previously ...
R. Wesson +4 more
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The Record-Warm Barents Sea and 0-Group Fish Response to Abnormal Conditions
Frontiers in Marine Science, 2020 The Barents Sea is a nursery area for many commercially and ecologically important fish stocks, and this whole region is presently subject to rapid climatic change from a cold period in the 1980s to a record warm period in the latest decade, with a peak ...
Elena Eriksen +7 more
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Light Elements in the Universe
Frontiers in Astronomy and Space Sciences, 2021 Due to their production sites, as well as to how they are processed and destroyed in stars, the light elements are excellent tools to investigate a number of crucial issues in modern astrophysics: from stellar structure and non-standard processes at work
Sofia Randich, Laura Magrini
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Neon and Sulfur Abundances of Planetary Nebulae in the Magellanic Clouds [PDF]
, 2007 The chemical abundances of neon and sulfur for 25 planetary nebulae (PNe) in the Magellanic Clouds are presented. These abundances have been derived using mainly infrared data from the Spitzer Space Telescope.
Aller L. H. +12 more
core +4 more sources
MANGANESE ABUNDANCES IN THE ATMOSPHERE OF CLUMP GIANTS
Odessa Astronomical Publications, 2013 The manganese abundances was determined in the atmospheres of clump giants stars whose election was made earlier based on their chemical composition and evolutionary tracks. The spectra of the studied stars were obtained using the facilities of the 1.93m
T. I. Gorbaneva
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