Results 71 to 80 of about 226,407 (198)
H$_2$O abundances and cloud properties in ten hot giant exoplanets
, 2018 Transmission spectroscopy of exoplanets has the potential to provide precise measurements of atmospheric chemical abundances, in particular of hot Jupiters whose large sizes and high temperatures make them conducive to such observations. To date, several
Gandhi, Siddharth +3 more
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Chemical Abundances in Globular Clusters [PDF]
Proceedings of XII International Symposium on Nuclei in the Cosmos — PoS(NIC XII), 2013 The Milky Way globular clusters are ideal laboratories for testing the predictions of nuclear astrophysics. Driven by Hubble Space Telescope photometry and high-resolution multi-object spectrographs on 8m-class telescopes, the study of chemical abundances in globular clusters is a vibrant area of astronomical research.
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The connection between the Galactic halo and ancient Dwarf Satellites
, 2017 We explore the hypothesis that the classical and ultra-faint dwarf spheroidal satellites of the Milky Way have been the building blocks of the Galactic halo by comparing their [O/Fe] and [Ba/Fe] versus [Fe/H] patterns with the ones observed in Galactic ...
Matteucci, F. +3 more
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Solar system chemical abundances corrected for systematics [PDF]
Monthly Notices of the Royal Astronomical Society: Letters, 2014 Abstract The relative chemical abundances between CI meteorites and the solar photosphere exhibit a significant trend with condensation temperature. A trend with condensation temperature is also seen when the solar photospheric abundances are compared to those of nearby solar twins. We use both these trends to determine the alteration of
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Hot Stars in Stellar Populations of Galaxies
GalaxiesStar-forming galaxies are hosts of dominant populations of recently formed, hot, massive stars, which give rise to conspicuous stellar spectral features and provide the ionizing fluxes. Strong outflows of these stars shape their properties.
Claus Leitherer
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Recent Advances in Understanding R-Process Nucleosynthesis in Metal-Poor Stars and Stellar Systems
UniverseThe rapid neutron-capture process (r-process) is responsible for the creation of roughly half of the elements heavier than iron, including precious metals like silver, gold, and platinum, as well as radioactive elements such as thorium and uranium ...
Avrajit Bandyopadhyay, Timothy C. Beers
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The abundance of HCN in circumstellar envelopes of AGB stars of different chemical types
, 2013 A multi-transition survey of HCN (sub-) millimeter line emission from a large sample of AGB stars of different chemical type is presented. The data are analysed and circumstellar HCN abundances are estimated.
Bieging, J. H. +5 more
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Chemical fractionation and abundances in coronal plasma [PDF]
Advances in Space Research, 2003 10 pages, 4 figures, to appear in Adv.Sp ...
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Aeos Is Mixing It Up: The (In)homogeneity of Metal Mixing Following Population III Star Formation
The Astrophysical JournalStellar surface abundances are records of the state of the gas from which stars formed and thus trace how individual elements have mixed into the surrounding medium following their ejection from stars.
Jennifer Mead +9 more
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Nucleosynthesis of Cobalt and Copper
GalaxiesChemical abundances of cobalt (Co; Z = 27) and copper (Cu; Z = 29) in bulge and halo stars are presented and compared with chemical evolution models.
Beatriz Barbuy +2 more
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