230 citations · 1.4k across the 21 of their papers we have counts for
21 papers
Uncertainty quantification in sunspot counts
Sophie Mathieu, Véronique Delouille, Laure Lefèvre +2
Observing and counting sunspots constitutes one of the longest-running scientific experiment, with first observations dating back to Galileo and the invention of the telescope arou…
3D hydrodynamic simulations of C ingestion into a convective O shell
Robert Andrassy, Falk Herwig, Paul Woodward +1
Interactions between convective shells in evolved massive stars have been linked to supernova impostors, to the production of the odd-Z elements Cl, K, and Sc, and they might also…
Cyberhubs: Virtual Research Environments for Astronomy
Falk Herwig, Robert Andrassy, Nic Annau +9
Collaborations in astronomy and astrophysics are faced with numerous cyber infrastructure challenges, such as large data sets, the need to combine heterogeneous data sets, and the…
i-Process Contribution of Rapidly Accreting White Dwarfs to the Solar Composition of First-Peak Neutron-Capture Elements
Benoit Côté, Pavel Denissenkov, Falk Herwig +4
Rapidly accreting white dwarfs (RAWDs) have been proposed as contributors to the chemical evolution of heavy elements in the Galaxy. Here, we test this scenario for the first time…
SYGMA: Stellar Yields for Galactic Modeling Applications
Christian Ritter, Benoit Côté, Falk Herwig +2
The stellar yields for galactic modeling applications (SYGMA) code is an open-source module that models the chemical ejecta and feedback of simple stellar populations (SSPs). It is…
NuGrid Stellar Data Set. II. Stellar Yields from H to Bi for Stellar Models with Mzams = 1 to 25Msun and Z = 0.0001 to 0.02
C. Ritter, F. Herwig, S. Jones +3
We provide here a significant extension of the NuGrid Set 1 models in mass coverage and toward lower metallicity, adopting the same physics assumptions. The combined data set now i…
Observing the metal-poor solar neighbourhood: a comparison of galactic chemical evolution predictions
T. Mishenina, M. Pignatari, B. Cot'e +14
Atmospheric parameters and chemical compositions for ten stars with metallicities in the region of -2.2< [Fe/H] <-0.6 were precisely determined using high resolution, high signal t…
Convective-reactive nucleosynthesis of K, Sc, Cl and p-process isotopes in O-C shell mergers
C. Ritter, R. Andrassy, B. Côté +4
We address the deficiency of odd-Z elements P, Cl, K and Sc in galactic chemical evolution models through an investigation of the nucleosynthesis of interacting convective O- and C…
The impact of (n,) reaction rate uncertainties of unstable isotopes near on the i process nucleosynthesis in He-shell flash white dwarfs
Pavel Denissenkov, Georgios Perdikakis, Falk Herwig +6
The first peak s-process elements Rb, Sr, Y and Zr in the post-AGB star Sakurai's object (V4334 Sagittarii) have been proposed to be the result of i-process nucleosynthesis in a po…
i-process nucleosynthesis and mass retention efficiency in He-shell flash evolution of rapidly accreting white dwarfs
Pavel Denissenkov, Falk Herwig, Umberto Battino +4
Based on stellar evolution simulations, we demonstrate that rapidly accreting white dwarfs in close binary systems are an astrophysical site for the intermediate neutron-capture pr…
Advanced LIGO Constraints on Neutron Star Mergers and R-Process Sites
Benoit Côté, Krzysztof Belczynski, Chris L. Fryer +4
The role of compact binary mergers as the main production site of r-process elements is investigated by combining stellar abundances of Eu observed in the Milky Way, galactic chemi…
JINA-NuGrid Galactic Chemical Evolution Pipeline
Benoit Côté, Christian Ritter, Falk Herwig +5
Galactic chemical evolution is a topic that involves nuclear physics, stellar evolution, galaxy evolution, observation, and cosmology. Continuous communication and feedback between…
Application of a Theory and Simulation based Convective Boundary Mixing model for AGB Star Evolution and Nucleosynthesis
U. Battino, M. Pignatari, C. Ritter +8
The -process nucleosynthesis in Asymptotic Giant Branch (AGB) stars depends on the modeling of convective boundaries. We present models and s-process simulations that adopt a tr…
The Impact of Modeling Assumptions in Galactic Chemical Evolution Models
Benoit Côté, Brian W. O'Shea, Christian Ritter +2
We use the OMEGA galactic chemical evolution code to investigate how the assumptions used for the treatment of galactic inflows and outflows impact numerical predictions. The goal…
Mass and Metallicity Requirement in Stellar Models for Galactic Chemical Evolution Applications
Benoit Côté, Christopher West, Alexander Heger +5
We used a one-zone chemical evolution model to address the question of how many masses and metallicities are required in grids of massive stellar models in order to ensure reliable…
H ingestion into He-burning convection zones in super-AGB stellar models as a potential site for intermediate neutron-density nucleosynthesis
S. Jones, C. Ritter, F. Herwig +4
We investigate the evolution of super-AGB thermal pulse (TP) stars for a range of metallicities (Z) and explore the effect of convective boundary mixing (CBM). With decreasing meta…
Uncertainties in Galactic Chemical Evolution Models
Benoit Côté, Christian Ritter, Brian W. O'Shea +4
We use a simple one-zone galactic chemical evolution model to quantify the uncertainties generated by the input parameters in numerical predictions, for a galaxy with properties si…
The i-process and CEMP-r/s stars
L. Dardelet, C. Ritter, P. Prado +10
We investigate whether the anomalous elemental abundance patterns in some of the C-enhanced metal-poor-s+r (CEMP-r/s) stars are consistent with predictions of nucleosynthesis yield…
Nuclear astrophysics with radioactive ions at FAIR
R. Reifarth, S. Altstadt, K. Göbel +317
The nucleosynthesis of elements beyond iron is dominated by neutron captures in the s and r processes. However, 32 stable, proton-rich isotopes cannot be formed during those proces…
NuGrid stellar data set I. Stellar yields from H to Bi for stars with metallicities Z = 0.02 and Z = 0.01
M. Pignatari, F. Herwig, R. Hirschi +16
We provide a set of stellar evolution and nucleosynthesis calculations that applies established physics assumptions simultaneously to low- and intermediate-mass and massive star mo…
MESA and NuGrid simulations of classical novae: CO and ONe nova nucleosynthesis
Pavel A. Denissenkov, James W. Truran, Marco Pignatari +6
Classical novae are the result of thermonuclear flashes of hydrogen accreted by CO or ONe white dwarfs, leading eventually to the dynamic ejection of the surface layers. These are…