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Open AccessJournal ArticleDOI

The formation of the heaviest elements

Anna Frebel, +1 more
- 01 Jan 2018 - 
- Vol. 71, Iss: 1, pp 30-37
TLDR
The rapid neutron-capture process needed to build up many of the elements heavier than iron seems to take place primarily in neutron-star mergers, not supernova explosions as mentioned in this paper, which is not the case in most of the existing works.
Abstract
The rapid neutron-capture process needed to build up many of the elements heavier than iron seems to take place primarily in neutron-star mergers, not supernova explosions.

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Isotope shift, nonlinearity of King plots, and the search for new particles

TL;DR: In this article, the authors derived a mean-field relativistic formula for the isotope shift of an electronic energy level for arbitrary angular momentum; they then used it to predict the spectra of superheavy metastable neutron-rich isotopes belonging to the hypothetical island of stability.
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Masses of exotic nuclei

TL;DR: A review of recent developments in precision mass spectrometry of radioactive isotopes (RI) and some selected related physics subjects are reviewed in this paper, where the authors focus on recent experimental challenges and findings as well as on the cutting-edge experimental technologies and mass formula theories.
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Atomic structure calculations of superheavy noble element oganesson ( Z = 118 )

TL;DR: Dzuba et al. as discussed by the authors calculated the spectrum and allowed $E1$ transitions of the superheavy element Og ($Z=118$), using a combination of configuration interaction and perturbation theory.
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The degree of fine-tuning in our universe — and others

TL;DR: In this article, the authors review the current constraints on the fundamental constants that describe the laws of physics and the cosmological parameters that determine the properties of our universe and show that viable universes exist over a range of parameter spaces.
References
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Journal ArticleDOI

Synthesis of the Elements in Stars

TL;DR: In this article, a count of the stable and radioactive elements and isotopes is given, and Table I,1 shows that only promethium has not been found in nature, whereas 99 elements are found terrestrially and technetium is found in stars.
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Gravitational Waves and Gamma-Rays from a Binary Neutron Star Merger: GW170817 and GRB 170817A

B. P. Abbott, +1198 more
TL;DR: In this paper, the authors used the observed time delay of $(+1.74\pm 0.05)\,{\rm{s}}$ between GRB 170817A and GW170817 to constrain the difference between the speed of gravity and speed of light to be between $-3
Journal ArticleDOI

Gravitational Waves and Gamma-rays from a Binary Neutron Star Merger: GW170817 and GRB 170817A

TL;DR: In this article, the authors used the observed time delay of $(+1.74 \pm 0.05 ) between GRB 170817A and GW170817 to constrain the difference between speed of gravity and the speed of light.
Journal ArticleDOI

The discovery and analysis of very metal-poor stars in the galaxy

TL;DR: Very metal-deficient stars have been identified in the last few decades as discussed by the authors, leading to the discovery of the majority of stars with [Fe/H] < −2.0.
Journal ArticleDOI

Light curves of the neutron star merger GW170817/SSS17a: Implications for r-process nucleosynthesis

Maria R. Drout, +54 more
- 22 Dec 2017 - 
TL;DR: In this paper, the authors present ultraviolet, optical, and infrared light curves of SSS17a extending from 10.9 hours to 18 days post-merger, showing that the late-time light curve indicates that SSS 17a produced at least 0.05 solar masses of heavy elements, demonstrating that neutron star mergers play a role in rapid neutron capture (r-process) nucleosynthesis in the universe.