Results 121 to 130 of about 10,538 (228)

Recent Advances in Understanding R-Process Nucleosynthesis in Metal-Poor Stars and Stellar Systems

Universe
The 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
doaj   +1 more source

Nucleosynthesis in Supernovae

, 2018
We present the status and open problems of nucleosynthesis in supernova explosions of both types, responsible for the production of the intermediate mass, Fe-group and heavier elements (with the exception of the main s-process).
Albino Perego, Perego, Albino, Friedrich-Karl Thielemann, Thielemann, Friedrich-Karl, Peter von Ballmoos, Isern, Jordi, von Ballmoos, Peter, Jordi Isern   +7 more
core   +1 more source

Nucleosynthesis of Cobalt and Copper

Galaxies
Chemical 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, Amâncio C. S. Friaça, Heitor Ernandes   +2 more
doaj   +1 more source

Neutron Capture Nucleosynthesis

, 2016
6 pages, 3 figures.
openaire   +2 more sources

Universality and variability of the heavy r-process element abundance pattern from a nonequilibrium approach

Frontiers in Astronomy and Space Sciences
A striking feature in the observed chemical composition of the majority of stars is the universality of the relative abundances of the heavy elements, although some outliers exist.
David Blaschke, David Blaschke, David Blaschke, Friedrich K. Röpke, Friedrich K. Röpke, Friedrich K. Röpke, Gerd Röpke   +6 more
doaj   +1 more source

Nucleosynthesis in Core-Collapse Supernovae

, 2018
The nucleosynthesis which occurs in core-collapse supernovae (CCSN) is one of the most important sources of elements in the universe. Elements from Oxygen through Iron come predominantly from supernovae, and contributions of heavier elements are also ...
Stevenson, Taylor
core  

Violent mergers revisited: The origin of the fastest stars in the Galaxy

Astronomy & Astrophysics
Binary systems of two carbon-oxygen white dwarfs are one of the most promising candidates for the progenitor systems of Type Ia supernovae. Violent mergers, where the primary white dwarf ignites when the secondary white dwarf smashes into it while being ...
Pakmor Rüdiger, Shen Ken J., Bhat Aakash, Rajamuthukumar Abinaya Swaruba, Collins Christine E., O’Donnell Cillian, Bauer Evan B., Callan Fionntan P., Röpke Friedrich K., Pollin Joshua M., Maguire Kate, Kwok Lindsey A., Seth Ravi, Taubenberger Stefan, Justham Stephen   +14 more
doaj   +1 more source

Novae breves from magnetar giant flares: Potential probes of neutron star crusts

Astronomy & Astrophysics
Context. Matter ejected from the magnetar crust during giant flares (GFs) may undergo r-process nucleosynthesis, producing short-lived optical transients termed “novae breves”.
Zhong Jiahang, Chen Qiu-Hong, Kang Yacheng, Li Hong-Bo, Zhang Jinghao, Chen Meng-Hua, Shao Lijing   +6 more
doaj   +1 more source

Cosmological aspects of nucleosynthesis

, 2012
We present a review of a scenario connecting the nucleosynthesis of heavy elements to cosmology. After discussing briefly the big bang nucleosynthesis, we summarize the results of observation of the heavy elements in extremely metal poor stars usually ...
Mounib F. El Eid, El Eid M.F.
core   +1 more source

Direct determination of the astrophysical reaction rate of 141Pr(γ, n)140Pr at the SSRF-SLEGS

Astronomy & Astrophysics
Context. The 141Pr(γ, n) cross-section is critical to the nucleosynthesis of p-nuclides 136,138Ce in thermonuclear supernovae and in massive stars. The photonuclear reaction of 141Pr(γ, n) provides a new method for producing 140Pr radioisotopes for ...
Hu J. H., An Z. D., Hao Z. R., Li Z. C., Fan G. T., Wang H. W., Ma Y. G., Liu T., Liang H., Wen H. H., Guo C. C.   +10 more
doaj   +1 more source