599 citations · 1.3k across the 27 of their papers we have counts for
23 papers · 1 filter
The impact of rotational mixing in intermediate-age star clusters with extended main-sequence turn-offs and extended red clumps
Lorenzo Martinelli, Andrea Miglio, Gaël Buldgen +6
The extended main-sequence turn-offs (eMSTOs) and extended red clumps (eRCs) observed in intermediate-age star clusters challenge the traditional understanding of clusters as simpl…
Detailed Simulations of Massive Hierarchical Triple Star Systems - Exploring the impact of the stellar physics on the evolutionary pathways of massive hierarchical triple systems
Luca Sciarini, Sylvia Ekström, Floris Kummer +4
Recent observations estimate that 30% of early B and O-type stars are found in triple systems. So far, the evolution of triple star systems has mainly been modeled using fast stell…
Fluorine production in He-burning regions of massive stars during cosmic history
Sophie Tsiatsiou, Georges Meynet, Eoin Farrell +11
The origin of fluorine is still a debated question. AGB stars synthesise this element and likely contribute significantly to its synthesis in the present-day Universe. However, it…
Toward a Comprehensive Grid of Cepheid Models with MESA I. Uncertainties of the Evolutionary Tracks of Intermediate-Mass Stars
Oliwia Ziółkowska, Radosław Smolec, Anne Thoul +3
Helium-burning stars, in particular Cepheids, are especially difficult to model, as the choice of free parameters can greatly impact the shape of the blue loops - the part of the e…
Rapidly rotating Population III stellar models as a source of primary nitrogen
Sophie Tsiatsiou, Yves Sibony, Devesh Nandal +12
The first stars might have been fast rotators. This would have important consequences for their radiative, mechanical and chemical feedback. We discuss the impact of fast initial r…
A method for non-linear inversion of the stellar structure applied to gravity-mode pulsators
Eoin Farrell, Gaël Buldgen, Georges Meynet +3
We present a method for a non-linear asteroseismic inversion suitable for gravity-mode pulsators and apply it to slowly pulsating B-type (SPB) stars. Our inversion method is based…
Impact of different approaches for computing rotating stellar models I. The solar metallicity case
Devesh Nandal, Georges Meynet, Sylvia Ekström +6
The physics of stellar rotation plays a crucial role in the evolution of stars, their final fate and the properties of compact remnants. Diverse approaches have been adopted to inc…
The evolution and impact of 3000 M stars in the early Universe
D. Nandal, E. Farrell, G. Buldgen +2
We present evolutionary models of massive, accreting population III stars with constant and variable accretion rates until the end of silicon burning, with final masses of 1000 - 3…
Critical accretion rates for rapidly growing massive Population III stars
Devesh Nandal, John A. Regan, Tyrone E. Woods +3
Efforts to understand the origin and growth of massive black holes observed in the early Universe have spurred a strong interest in the evolution and fate of rapidly-accreting prim…
The Initial Magnetic Field Distribution in AB Stars
Eoin Farrell, Adam S. Jermyn, Matteo Cantiello +1
Stars are born with magnetic fields, but the distribution of their initial field strengths remains uncertain. We combine observations with theoretical models of magnetic field evol…
Modules for Experiments in Stellar Astrophysics (MESA): Time-Dependent Convection, Energy Conservation, Automatic Differentiation, and Infrastructure
Adam S. Jermyn, Evan B. Bauer, Josiah Schwab +19
We update the capabilities of the open-knowledge software instrument Modules for Experiments in Stellar Astrophysics (MESA). The new auto_diff module implements automatic different…
Grids of stellar models with rotation VII: Models from 0.8 to 300 M at super-solar metallicity (Z = 0.020)
Norhasliza Yusof, Raphael Hirschi, Patrick Eggenberger +11
We present a grid of stellar models at super-solar metallicity (Z = 0.020) extending the previous grids of Geneva models at solar and sub-solar metallicities. A metallicity of Z =…
Numerical experiments to help understand cause and effect in massive star evolution
Eoin Farrell, Jose Groh, Georges Meynet +1
The evolution of massive stars is affected by a variety of physical processes including convection, rotation, mass loss and binary interaction. Because these processes modify the i…
Ionizing photon production of Population III stars: effects of rotation, convection, and initial mass function
Laura J. Murphy, Jose H. Groh, Eoin Farrell +5
The first stars are thought to be one of the dominant sources of hydrogen reionization in the early Universe, with their high luminosities and surface temperatures expected to driv…
Convective core sizes in rotating massive stars: I. Constraints from solar metallicity OB field stars
S. Martinet, G. Meynet, S. Ekström +11
Spectroscopic studies of Galactic O and B stars show that many stars with masses above 8 M are observed in the HR diagram just beyond the Main-Sequence (MS) band predicte…
Grids of stellar models with rotation: V. Models from 1.7 to 120 Msun at zero metallicity
Laura J. Murphy, Jose H. Groh, Sylvia Ekstrom +10
Understanding the nature of the first stars is key to understanding the early universe. With new facilities such as JWST we may soon have the first observations of the earliest ste…
Is GW190521 the merger of black holes from the first stellar generations?
Eoin J. Farrell, Jose H. Groh, Raphael Hirschi +5
GW190521 challenges our understanding of the late-stage evolution of massive stars and the effects of the pair-instability in particular. We discuss the possibility that stars at l…
SNAPSHOT: Connections between Internal and Surface Properties of Massive Stars
Eoin Farrell, Jose Groh, Georges Meynet +3
We introduce SNAPSHOT, a technique to systematically compute stellar structure models in hydrostatic and thermal equilibrium based on 3 structural properties - core mass $M_{\rm co…
The possible disappearance of a massive star in the low metallicity galaxy PHL 293B
Andrew Allan, Jose Groh, Andrea Mehner +4
We investigate a suspected very massive star in one of the most metal-poor dwarf galaxies, PHL~293B. Excitingly, we find the sudden disappearance of the stellar signatures from our…
The Uncertain Masses of Progenitors of Core Collapse Supernovae and Direct Collapse Black Holes
Eoin Farrell, Jose Groh, Georges Meynet +1
We show that it is not possible to determine the final mass of a red supergiant (RSG) at the pre-supernova (SN) stage from its luminosity and effective temperatur…
Massive black holes regulated by luminous blue variable mass loss and magnetic fields
Jose H. Groh, Eoin Farrell, Georges Meynet +5
We investigate the effects of mass loss during the main-sequence (MS) and post-MS phases of massive star evolution on black hole (BH) birth masses. We compute solar metallicity Gen…
Grids of stellar models with rotation IV. Models from 1.7 to 120 Msun at a metallicity Z = 0.0004
Jose H. Groh, Sylvia Ekström, Cyril Georgy +8
The effects of rotation on stellar evolution are particularly important at low metallicity, when mass loss by stellar winds diminishes and the surface enrichment due to rotational…
Impact of binary interaction on the evolution of blue supergiants
Eoin Farrell, Jose Groh, Georges Meynet +5
A large fraction of massive stars evolve in interacting binary systems, which dramatically modifies the outcome of stellar evolution. We investigated the properties of blue supergi…