scholarly journals Solar oscillations

2008 ◽  
Vol 4 (S257) ◽  
pp. 83-93
Author(s):  
H. M. Antia
Keyword(s):  
Angular Momentum ◽  
Solar Cycle ◽  
Momentum Transfer ◽  
Rotation Rate ◽  
Heavy Element ◽  
Stellar Structure ◽  
Solar Oscillations ◽  
Element Abundances ◽  
Solar Structure ◽  
Structure And Dynamics

AbstractStudy of solar oscillations has provided us detailed information about solar structure and dynamics. These in turn provide a test of theories of stellar structure and evolution as well as theories of angular momentum transfer and dynamo. Some of these results about the solar structure and its implication on the recent revision of heavy element abundances are described. Apart from these the solar cycle variations in the rotation rate and its gradients are also discussed.

scholarly journals Updated solar neutrino fluxes with new heavy element abundances

2020 ◽  
Vol 19 ◽  
pp. 66
Author(s):  
G. I. Karathanou ◽  
V. Tsikoudi ◽  
T. S. Kosmas
Keyword(s):  
Solar Neutrino ◽  
Heavy Element ◽  
Convection Zone ◽  
Reaction Rates ◽  
Extensive Study ◽  
Element Abundances ◽  
Solar Structure ◽  
Solar Evolution ◽  
Microphysical Parameters ◽  
Neutrino Fluxes

In the present work we carry out an extensive study of the solar structure and solar evolution through the use of the TYCHO 6.92 code, which includes a variety of programs and subroutines. In this code we incorporate the most updated microphysical parameters such as screening, recent experimental measurements of the astrophysical factors-S (LUNA), several updated, recently measured, heavy element abundances, etc., and created new models describing crucial phenomena of the solar structure and solar evolution. We used this code to calculate and update nuclear reaction rates, solar neutrino fluxes, solar quantities which characterize the internal solar structure such as temperature, pressure, density, luminosity, heavy element abundances (4He, 12C, 14N, 16O, etc.) as well as sound speed profile and depth of the convection zone.

Distribution of R- and S-Process Elements in the Galactic Halo

1988 ◽  
Vol 132 ◽  
pp. 501-506
Author(s):  
C. Sneden ◽  
C. A. Pilachowski ◽  
K. K. Gilroy ◽  
J. J. Cowan
Keyword(s):  
Heavy Element ◽  
Galactic Halo ◽  
Low Noise ◽  
Heavy Elements ◽  
Process Synthesis ◽  
Element Abundances ◽  
Halo Stars ◽  
Abundance Patterns ◽  
R Process ◽  
Process Elements

Current observational results for the abundances of the very heavy elements (Z>30) in Population II halo stars are reviewed. New high resolution, low noise spectra of many of these extremely metal-poor stars reveal general consistency in their overall abundance patterns. Below Galactic metallicities of [Fe/H] Ã −2, all of the very heavy elements were manufactured almost exclusively in r-process synthesis events. However, there is considerable star-to-star scatter in the overall level of very heavy element abundances, indicating the influence of local supernovas on element production in the very early, unmixed Galactic halo. The s-process appears to contribute substantially to stellar abundances only in stars more metal-rich than [Fe/H] Ã −2.

Heavy‐Element Abundances in Blue Compact Galaxies

1999 ◽  
Vol 511 (2) ◽  
pp. 639-659 ◽  
Author(s):  
Yuri I. Izotov ◽  
Trinh X. Thuan
Keyword(s):  
Heavy Element ◽  
Element Abundances ◽  
Compact Galaxies

scholarly journals Spin-lattice dynamics model with angular momentum transfer for canonical and microcanonical ensembles

2021 ◽  
Vol 103 (2) ◽  
Author(s):  
Mara Strungaru ◽  
Matthew O. A. Ellis ◽  
Sergiu Ruta ◽  
Oksana Chubykalo-Fesenko ◽  
Richard F. L. Evans ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Momentum Transfer ◽  
Lattice Dynamics ◽  
Dynamics Model ◽  
Angular Momentum Transfer ◽  
Spin Lattice

scholarly journals A Solar cycle correlation of coronal element abundances in Sun-as-a-star observations

2017 ◽  
Vol 8 (1) ◽  
Author(s):  
David H. Brooks ◽  
Deborah Baker ◽  
Lidia van Driel-Gesztelyi ◽  
Harry P. Warren
Keyword(s):  
Solar Cycle ◽  
Element Abundances

scholarly journals Angular momentum transfer and partition in the deep-inelastic reaction 664 MeV 84Kr + natAg

1981 ◽  
Vol 371 (3) ◽  
pp. 510-532 ◽  
Author(s):  
L.G. Sobotka ◽  
C.C. Hsu ◽  
G.J. Wozniak ◽  
D.J. Morrissey ◽  
L.G. Moretto
Keyword(s):  
Angular Momentum ◽  
Momentum Transfer ◽  
Angular Momentum Transfer ◽  
Inelastic Reaction ◽  
Deep Inelastic Reaction
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