Heavy elements in stars.(ASTRONOMY)Boothroyd, Arnold I
A brief history is given of astronomical observations of the spectra of heavy elements in stars, with emphasis on those elements produced by slow capture of neutrons in the stellar interior. As an example, an abundance analysis of the electrons zirconium through ruthenium, including the unstable el...
= 640, N = 480 and Z = 160 is definitely ruled out and that the nuclear basis of Chechetkin and Kowalski for the production of super heavy elements is unfounded, although it may be that these elements can be produced by an r-process occurring in the surface material of neutron stars....
On the heavy-element excess in stars of late spectral classesManinbo (10,000 LivesliteraturehistoryKoreanbiographyIt is suggested that the excess of elements in the 5th and 6th periods of the periodic table in S and some C stars is due to the decay of superdense prestellar matter. Arguments...
The first stars in the Universe were probably quite different from those born today. Composed almost entirely of hydrogen and helium (plus a tiny trace of lithium), they lacked the heavier elements that determine the formation and evolution of younger stars. Although we cannot observe the very ...
Cool Stars with Excesses of Heavy Elements Proceedings of the Strasbourg Observatory Colloquium Held at Strasbourg, France, July 3–6, 1984Conference proceedings © 1985 Overview Editors: Mercedes Jaschek, Philip C. Keenan Part of the book series: Astrophysics and Space Science Library (ASSL, ...
And Hoyle decided to make heavy elements in stars, and to spread them around by supernova explosions. Y Hoyle decidió hacer elementos pesados en las estrellas, y propagarlos mediante explosiones de supernovas. Literature The French soon began to make heavy attacks on the town, which was...
The 18F(alpha,p)21Ne reaction and its astrophysical implications Recent observations of the abundance distribution of heavy elements in metal-poor old stars suggest an existence of more than one rapid neutron capture pro... HY Lee - Dissertations & Theses - Gradworks 被引量: 3发表: 2006年 ...
Fe and Mg as the reference elements indicate similarities between our sample of old metal-rich dwarf stars and the thin disk. On the other hand, the abundance ratios using O as the reference element, as well as their kinematics, suggest that our sample is clearly distinct from the thin-...
G. 1999. Cosmic Histories of Stars, Gas, Heavy Elements, and Dust in Galaxies. Astrophysical... YC Pei,SM Fall,MG Hauser 被引量: 0发表: 1998年 The cosmic origins of carbon and the evolution of dust, gas and the CNO elements in galaxies Carbon, along with nitrogen and oxygen, is ...