Benoît Côté
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View article: <scp>Aeos</scp>: The Impact of Population III Initial Mass Function and Star-by-star Models in Galaxy Simulations
<span>Aeos</span>: The Impact of Population III Initial Mass Function and Star-by-star Models in Galaxy Simulations Open
We explore the effect of variations in the Population III initial mass function (IMF) and star-by-star feedback on early galaxy formation and evolution using the A eos simulations. We compare simulations with two different Population III I…
View article: Classifying Metal-poor Stars with Machine Learning Using Nucleosynthesis Calculations
Classifying Metal-poor Stars with Machine Learning Using Nucleosynthesis Calculations Open
We apply the capabilities of machine learning (ML) to discern patterns in order to classify metal-poor stars. To do so, we train an ML model on a bank of nucleosynthesis calculations derived from hydrodynamic simulations for events such as…
View article: Aeos is Mixing it Up: The (In)homogeneity of Metal Mixing Following Population III Star Formation
Aeos is Mixing it Up: The (In)homogeneity of Metal Mixing Following Population III Star Formation Open
Stellar surface abundances are records of the state of the gas from which stars formed, and thus trace how individual elements have mixed into the surrounding medium following their ejection from stars. In this work, we test the common ass…
View article: The Impact of Initial Composition on Massive Star Evolution and Nucleosynthesis
The Impact of Initial Composition on Massive Star Evolution and Nucleosynthesis Open
We study the sensitivity of presupernova evolution and supernova nucleosynthesis yields of massive stars to variations of the initial composition. We use the solar abundances from Lodders, and compute two different sets of initial stellar …
View article: Classifying metal-poor stars with machine learning using nucleosynthesis calculations
Classifying metal-poor stars with machine learning using nucleosynthesis calculations Open
We apply the capabilities of machine learning (ML) to discern patterns in order to classify metal-poor stars. To do so, we train an ML model on a bank of nucleosynthesis calculations derived from hydrodynamic simulations for events such as…
View article: Using chemical evolution models of the Milky Way disk to constrain Type Ia supernova progenitors
Using chemical evolution models of the Milky Way disk to constrain Type Ia supernova progenitors Open
Context. Thermonuclear explosions of carbon-oxygen white dwarfs as Type Ia supernovae (SNe Ia) play a significant role in the galactic chemical evolution (GCE) of the Milky Way. However, a long-standing and as yet unresolved problem of mod…
View article: Can We Draw Conclusions on Supernova Shock Wave Propagation Using Short‐Lived Radioactive Isotopes?
Can We Draw Conclusions on Supernova Shock Wave Propagation Using Short‐Lived Radioactive Isotopes? Open
We run a three‐dimensional Galactic chemical evolution (GCE) model to follow the propagation of 53 Mn (exclusively produced from type Ia supernovae, SNIa), 60 Fe (exclusively produced from core‐collapse supernovae, CCSNe), 182 Hf (exclusiv…
View article: AEOS: Transport of Metals from Minihalos following Population III Stellar Feedback
AEOS: Transport of Metals from Minihalos following Population III Stellar Feedback Open
We investigate how stellar feedback from the first stars (Population III) distributes metals through the interstellar and intergalactic medium using the star-by-star cosmological hydrodynamics simulation, A eos . We find that energy inject…
View article: AEOS: Star-by-star Cosmological Simulations of Early Chemical Enrichment and Galaxy Formation
AEOS: Star-by-star Cosmological Simulations of Early Chemical Enrichment and Galaxy Formation Open
The A eos project introduces a series of high-resolution cosmological simulations that model star-by-star chemical enrichment and galaxy formation in the early Universe, achieving 1 pc resolution. These simulations capture the complexities…
View article: Silicon Isotopic Composition of Mainstream Presolar SiC Grains Revisited: The Impact of Nuclear Reaction Rate Uncertainties
Silicon Isotopic Composition of Mainstream Presolar SiC Grains Revisited: The Impact of Nuclear Reaction Rate Uncertainties Open
Presolar grains are stardust particles that condensed in the ejecta or in the outflows of dying stars and can today be extracted from meteorites. They recorded the nucleosynthetic fingerprint of their parent stars and thus serve as valuabl…
View article: The Impact of Initial Composition on Massive Star Evolution and Nucleosynthesis
The Impact of Initial Composition on Massive Star Evolution and Nucleosynthesis Open
We study the sensitivity of presupernova evolution and supernova nucleosynthesis yields of massive stars to variations of the initial composition. We use the solar abundances from Lodders (2009), and compute two different initial stellar c…
View article: AEOS: Star-by-Star Cosmological Simulations of Early Chemical Enrichment and Galaxy Formation
AEOS: Star-by-Star Cosmological Simulations of Early Chemical Enrichment and Galaxy Formation Open
The AEOS project introduces a series of high-resolution cosmological simulations that model star-by-star chemical enrichment and galaxy formation in the early Universe, achieving 1 pc resolution. These simulations capture the complexities …
View article: Nova contributions to the chemical evolution of the Milky Way
Nova contributions to the chemical evolution of the Milky Way Open
Context. The explosive burning that drives nova eruptions results in unique nucleosynthesis that heavily over-produces certain isotopes relative to the solar abundance. However, novae are often ignored when considering the chemical evoluti…
View article: Nova contributions to the chemical evolution of the Milky Way
Nova contributions to the chemical evolution of the Milky Way Open
Context. The explosive burning that drives nova eruptions results in unique nucleosynthesis that heavily over-produces certain isotopes relative to the solar abundance. However, novae are often ignored when considering the chemical evoluti…
View article: Engaging Global Health Pedagogy: The Story Behind an Transborder online problem-based learning course between Canadian and Haitian Occupational Therapy Students
Engaging Global Health Pedagogy: The Story Behind an Transborder online problem-based learning course between Canadian and Haitian Occupational Therapy Students Open
International and intercultural educational partnerships facilitate exporting a curriculum or course from a home university situated in a developed country (North) to a host university situated in a low-income country (South). Decolonizati…
View article: Galactic chemical evolution with the short-lived isotopes <sup>53</sup>Mn, <sup>60</sup>Fe, <sup>182</sup>Hf, and <sup>244</sup>Pu
Galactic chemical evolution with the short-lived isotopes <sup>53</sup>Mn, <sup>60</sup>Fe, <sup>182</sup>Hf, and <sup>244</sup>Pu Open
We run a three-dimensional Galactic chemical evolution (GCE) model to follow the propagation of 53 Mn from supernovae of type Ia (SNIa), 60 Fe from core-collapse supernovae (CCSNe), 182 Hf from intermediate mass stars (IMSs), and 244 Pu fr…
View article: Empowering Scientific Discovery Through Computing at the Advanced Photon Source
Empowering Scientific Discovery Through Computing at the Advanced Photon Source Open
This paper explores the challenges and solutions for managing and processing the vast amount of data generated by the Advanced Photon Source (APS), a synchrotron light source facility producing ultra-bright x-rays for diverse scientific do…
View article: Demonstrating Cross-Facility Data Processing at Scale With Laue Microdiffraction
Demonstrating Cross-Facility Data Processing at Scale With Laue Microdiffraction Open
In February and April 2023 live, at-scale data processing demonstrations were conducted between the Advanced Photon Source (APS), a synchrotron light source, and the Argonne Leadership Computing Facility (ALCF). These tests were run as par…
View article: Observational constraints on the origin of the elements
Observational constraints on the origin of the elements Open
Aims. We constrain the role of different Type Ia supernova (SN Ia) channels in the chemical enrichment of the Galaxy by studying the abundances of nickel in Galactic stars. We investigated four different SN Ia sub-classes, including the cl…
View article: Observational constraints on the origin of the elements – VI. Origin and evolution of neutron-capture elements as probed by the <i>Gaia</i>-ESO survey
Observational constraints on the origin of the elements – VI. Origin and evolution of neutron-capture elements as probed by the <i>Gaia</i>-ESO survey Open
Most heavy elements beyond the iron peak are synthesized via neutron capture processes. The nature of the astrophysical sites of neutron capture processes is still very unclear. In this work, we explore the observational constraints of the…
View article: The chemical evolution of the solar neighbourhood for planet-hosting stars
The chemical evolution of the solar neighbourhood for planet-hosting stars Open
Theoretical physical-chemical models for the formation of planetary systems depend on data quality for the Sun’s composition, that of stars in the solar neighbourhood, and of the estimated ’pristine’ compositions for stellar systems. The e…
View article: Inhomogeneous Enrichment of Radioactive Nuclei in the Galaxy: Deposition of Live <sup>53</sup>Mn, <sup>60</sup>Fe, <sup>182</sup>Hf, and <sup>244</sup>Pu into Deep-sea Archives. Surfing the Wave?
Inhomogeneous Enrichment of Radioactive Nuclei in the Galaxy: Deposition of Live <sup>53</sup>Mn, <sup>60</sup>Fe, <sup>182</sup>Hf, and <sup>244</sup>Pu into Deep-sea Archives. Surfing the Wave? Open
While modeling the galactic chemical evolution (GCE) of stable elements provides insights to the formation history of the Galaxy and the relative contributions of nucleosynthesis sites, modeling the evolution of short-lived radioisotopes (…
View article: Inhomogeneous enrichment of radioactive nuclei in the Galaxy: Deposition of live Mn-53, Fe-60, Hf-182, and Pu-244 into deep-sea archives. Surfing the wave?
Inhomogeneous enrichment of radioactive nuclei in the Galaxy: Deposition of live Mn-53, Fe-60, Hf-182, and Pu-244 into deep-sea archives. Surfing the wave? Open
While modelling the galactic chemical evolution (GCE) of stable elements provides insights to the formation history of the Galaxy and the relative contributions of nucleosynthesis sites, modelling the evolution of short-lived radioisotopes…
View article: Chemical evolution of fluorine in the Milky Way
Chemical evolution of fluorine in the Milky Way Open
Fluorine has many different potential sites and channels of production, making narrowing down a dominant site of fluorine production particularly challenging. In this work, we investigate which sources are the dominant contributors to the …
View article: Chemical Evolution of Fluorine in the Milky Way
Chemical Evolution of Fluorine in the Milky Way Open
Fluorine has many different potential sites and channels of production, making narrowing down a dominant site of fluorine production particularly challenging. In this work, we investigate which sources are the dominant contributors to the …
View article: Horizons: nuclear astrophysics in the 2020s and beyond
Horizons: nuclear astrophysics in the 2020s and beyond Open
Nuclear astrophysics is a field at the intersection of nuclear physics and astrophysics, which seeks to understand the nuclear engines of astronomical objects and the origin of the chemical elements. This white paper summarizes progress an…
View article: Progress on nuclear reaction rates affecting the stellar production of <sup>26</sup>Al
Progress on nuclear reaction rates affecting the stellar production of <sup>26</sup>Al Open
The radioisotope 26 Al is a key observable for nucleosynthesis in the Galaxy and the environment of the early Solar System. To properly interpret the large variety of astronomical and meteoritic data, it is crucial to understand both the n…
View article: Enrichment of the Galactic disc with neutron-capture elements: Gd, Dy, and Th
Enrichment of the Galactic disc with neutron-capture elements: Gd, Dy, and Th Open
The study of the origin of heavy elements is one of the main goals of nuclear astrophysics. In this paper, we present new observational data for the heavy r-process elements gadolinium (Gd, Z= 64), dysprosium (Dy, Z= 66), and thorium (Th, …
View article: r -process nucleosynthesis: connecting rare-isotope beam facilities with the cosmos
r -process nucleosynthesis: connecting rare-isotope beam facilities with the cosmos Open
© 2019 IOP Publishing Ltd. This is an exciting time for the study of r-process nucleosynthesis. Recently, a neutron star merger GW170817 was observed in extraordinary detail with gravitational waves and electromagnetic radiation from radio…