Results 61 to 70 of about 307 (107)

Condensation time of the solar nebula from extinct I in primitive meteorites. [PDF]

Proc Natl Acad Sci U S A, 1975
Lewis RS, Anders E.
europepmc   +1 more source

Neutron capture cross section measurements for nuclear astrophysics at CERN n TOF

A series of neutron capture cross section measurements of interest to nuclear astrophysics have been recently performed at n TOF, the neutron spallation source operating at CERN.
Pretel Sánchez, Carme, Calviño Tavares, Francisco, Cortés Rossell, Guillem Pere, Poch Parés, Agustí   +3 more
core  

Understanding the Cool DA White Dwarf Pulsator, G29–38 [PDF]

, 1997
The white dwarfs are promising laboratories for the study of cosmochronology and stellar evolution. Through observations of the pulsating white dwarfs, we can measure their internal structures and compositions, critical to understanding post main ...
Nitta, A., Liebert, James, Chevreton, M., Bruvold, A., Watson, T. K., Krzesi´nski, J., Winget, D. E., Kanaan, A., Yanagida, K., Kepler, S. O., Giovannini, O., Hine, B. P., Kurtz, D. W., Seetha, S., Barstow, M. A., Sullivan, D. J., Nather, R. E., Wickramasinghe, D. T., Leibowitz, E. M., Hansen, C. J., Augusteijn, T., Martinez, Peter, Bradley, A., Claver, C. F., O’Donoghue, D., Mara, T. M. K., Fontaine, G., Kleinman, S. J., Moskalik, P., Ashoka, B. N., Solheim, Jan Erik, Warner, B., Grauer, A. D., Dixson, J. S., Clemens, J. C., Dolez, N., Achilleos, N.   +36 more
core  

Recent progress and future prospects of the early solar system chronology. [PDF]

Natl Sci Rev
Amelin Y, Yin QZ.
europepmc   +1 more source

Sub-epsilon natural ²³⁴U/²³⁸U measurements refine the ²³⁴U half-life and U-Th geochronology. [PDF]

Sci Adv
Hu HM, Shen CC, Cheng H, Woodhead JD, Edwards RL, Zhao JX, Huang CY, Lu PY, Chien WY, Wang J, Jia X, Yokoyama Y, Cai Y, Zachariáš J.   +13 more
europepmc   +1 more source

Thorium/neodymium cosmochronology and Galactic chemical evolution

The Astrophysical Journal, 1988
G. J. Mathews, D. N. Schramm
openaire   +1 more source

The effect of ²²Ne diffusion in the evolution and pulsational properties of white dwarfs with solar metallicity progenitors

, 2019
Because of the large neutron excess of 22Ne, sedimentation of this isotope occurs rapidly in the interior of white dwarfs. This process releases an additional amount of energy, thus delaying the cooling times of the white dwarf.
Isern, J., García Berro, E., Althaus, Leandro Gabriel, Miller Bertolami, Marcelo Miguel, Vinyoles, N., Córsico, Alejandro Hugo, Serenelli, Aldo Marcelo, Camisassa, María Eugenia   +7 more
core  

New cooling sequences for old white dwarfs

We present full evolutionary calculations appropriate for the study of hydrogen-rich DA white dwarfs. This is done by evolving white dwarf progenitors from the zero-age main sequence, through the core hydrogen-burning phase, the helium-burning phase, and
Miller Bertolami, Marcelo M, Rohrmann, Rene Daniel, Althaus, Leandro Gabriel, Romero, A.D., Córsico, Alejandro Hugo, García-Berro Montilla, Enrique, Renedo Rouco, Isabel   +6 more
core  

The effect of 22Ne diffusion in the evolution and pulsational properties of white dwarfs with solar metallicity prgenitors

© 2016. The American Astronomical Society. All rights reserved. Because of the large neutron excess of 22Ne, sedimentation of this isotope occurs rapidly in the interior of white dwarfs. This process releases an additional amount of energy, thus delaying
Miller Bertolami, Marcelo M, Serenelli, Aldo M., Isem, Jordi, Vinyoles, Núria, Corsico, Alejandro H., Camisassa, Maria E, Althaus, Leandro G., García-Berro Montilla, Enrique   +7 more
core  

Stellar neutron capture processes and cosmochronology

, 1999
openaire   +1 more source