261 citations · 1.3k across the 25 of their papers we have counts for
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Aluminium-26 from massive binary stars III. Binary stars up to core-collapse and their impact on the early Solar System
Hannah E. Brinkman, C. L. Doherty, M. Pignatari +2
Many of the short-lived radioactive nuclei that were present in the early Solar System can be produced in massive stars. In the first paper in this series (Brinkman et al. 2019), w…
Cool, Luminous, and Highly Variable Stars in the Magellanic Clouds. II: Spectroscopic and Environmental Analysis of Thorne-Żytkow Object and Super-AGB Star Candidates
Anna J. G. O'Grady, Maria R. Drout, B. M. Gaensler +9
In previous work we identified a population of 38 cool and luminous variable stars in the Magellanic Clouds and examined 11 in detail in order to classify them as either Thorne-Żyt…
Nucleosynthetic yields of intermediate-mass primordial to extremely metal-poor stars
P. Gil-Pons, C. L. Doherty, S. W. Campbell +1
Abridged. We aim to better characterise the evolution and fates, and determine updated nucleosynthetic yields of intermediate-mass stars between primordial and EMP metallicity (Z=1…
The RADIOSTAR Project
Maria Lugaro, Benoit Côté, Marco Pignatari +12
Radioactive nuclei are the key to understanding the circumstances of the birth of our Sun because meteoritic analysis has proven that many of them were present at that time. Their…
First models of s process in AGB stars of solar metallicity for the stellar evolutionary code ATON with a novel stable explicit numerical solver
A. Yagüe López, D. A. García-Hernández, P. Ventura +4
Aims. We describe the first s-process post-processing models for asymptotic giant branch (AGB) stars of masses 3, 4 and 5 M at solar metallicity (Z=0.018) computed using the input…
Aluminium-26 from massive binary stars II. Rotating single stars up to core-collapse and their impact on the early Solar System
Hannah E. Brinkman, J. W. den Hartogh, C. L. Doherty +2
Radioactive nuclei were present in the early Solar System, as inferred from analysis of meteorites. Many are produced in massive stars, either during their lives or their final exp…
Nucleosynthetic yields of Z= intermediate-mass stars
P. Gil-Pons, C. L. Doherty, J. Gutiérrez +3
Abridged: Observed abundances of extremely metal-poor (EMP) stars in the Halo hold clues for the understanding of the ancient universe. Interpreting these clues requires theoretica…
The s process in rotating low-mass AGB stars. Nucleosynthesis calculations in models matching asteroseismic constraints
J. W. den Hartogh, R. Hirschi, M. Lugaro +5
Aims. We investigate the s-process during the AGB phase of stellar models whose cores are enforced to rotate at rates consistent with asteroseismology observations of their progeni…
Fates of the oldest intermediate-mass stars - Primordial to Extremely Metal-Poor AGB and Super-AGB Stars: White Dwarf or Supernova progenitors
Pilar Gil-Pons, Carolyn L. Doherty, Jordi L. Gutiérrez +4
Abridged: Getting a better understanding of the evolution and nucleosynthetic yields of the most metal-poor stars (appr. Z<=10^-5) is critical because they are part of the big pict…
Partial mixing and the formation of 13C pockets in AGB stars: effects on the s-process elements
J. F. Buntain, C. L. Doherty, M. Lugaro +3
The production of the elements heavier than iron via slow neutron captures (the s process) is a main feature of the contribution of asymptotic giant branch (AGB) stars of low mass…
Super-AGB Stars and their role as Electron Capture Supernova progenitors
Carolyn L. Doherty, Pilar Gil-Pons, Lionel Siess +1
We review the lives, deaths and nucleosynthetic signatures of intermediate mass stars in the range approximately 6.5-12 Msun, which form super-AGB stars near the end of their lives…
Stellar yields and abundances: new directions from planetary nebulae
Maria Lugaro, Amanda I. Karakas, Marco Pignatari +1
Planetary nebulae retain the signature of the nucleosynthesis and mixing events that occurred during the previous AGB phase. Observational signatures complement observations of AGB…
Explosion of white dwarfs harboring hybrid CONe cores
E. Bravo, P. Gil-Pons, J. L. Gutiérrez +1
Recently, it has been found that off-centre carbon burning in a subset of intermediate-mass stars does not propagate all the way to the center, resulting in a class of hybrid CONe…
On Potassium and Other Abundance Anomalies of Red Giants in NGC 2419
Christian Iliadis, Amanda Karakas, Nikos Prantzos +2
Globular clusters are of paramount importance for testing theories of stellar evolution and early galaxy formation. Strong evidence for multiple populations of stars in globular cl…
Evolution and nucleosynthesis of helium-rich asymptotic giant branch models
Luke J. Shingles, Carolyn L. Doherty, Amanda I. Karakas +3
There is now strong evidence that some stars have been born with He mass fractions as high as (e.g., in Centauri). However, the advanced evolution, chemical yi…
On the Numerical Treatment and Dependence of Thermohaline Mixing in Red Giants
John Lattanzio, Lionel Siess, Ross Church +5
In recent years much interest has been shown in the process of thermohaline mixing in red giants. In low and intermediate mass stars this mechanism first activates at the position…
Super and massive AGB stars - IV. Final fates - Initial to final mass relation
Carolyn L. Doherty, Pilar Gil-Pons, Lionel Siess +2
We explore the final fates of massive intermediate-mass stars by computing detailed stellar models from the zero age main sequence until near the end of the thermally pulsing phase…
Stellar origin of the 182Hf cosmochronometer and the presolar history of solar system matter
Maria Lugaro, Alexander Heger, Dean Osrin +7
Among the short-lived radioactive nuclei inferred to be present in the early solar system via meteoritic analyses, there are several heavier than iron whose stellar origin has been…
Super and massive AGB stars - III. Nucleosynthesis in metal-poor and very metal-poor stars - Z=0.001 and 0.0001
Carolyn L. Doherty, Pilar Gil-Pons, Herbert H. B. Lau +3
We present a new grid of stellar models and nucleosynthetic yields for super-AGB stars with metallicities Z=0.001 and 0.0001, applicable for use within galactic chemical evolution…
Super and Massive AGB Stars: II - Nucleosynthesis and Yields - Z=0.02, 0.008 and 0.004
Carolyn L. Doherty, Pilar Gil-Pons, Herbert H. B Lau +2
We have computed detailed evolution and nucleosynthesis models for super and massive AGB stars over the mass range 6.5-9.0 Msun in divisions of 0.5 Msun with metallicities Z=0.02,…
Short-lived radioactivity in the early Solar System: the Super-AGB star hypothesis
Maria Lugaro, Carolyn L. Doherty, Amanda. I. Karakas +5
The composition of the most primitive Solar System condensates, such as calcium-aluminum-rich inclusions (CAI) and micron-sized corundum grains, show that short-lived radionuclides…
The end of super AGB and massive AGB stars I. The instabilities that determine the final mass of AGB stars
Herbert H. B. Lau, Pilar Gil-Pons, Carolyn Doherty +1
The literature is rich in analysis and results related to thermally pulsing-asymptotic giant branch (TP-AGB) stars, but the problem of the instabilities that arise and cause the di…