53 citations · 318 across the 25 of their papers we have counts for
27 papers
Impact of Sub-2.5 MeV 12C+12CResonances on the Production of Elements from C to Pd in Core-Collapse Supernovae
L. Roberti, S. Palmerini, A. Falla +10
We explore the impact of a more efficient 12C+12C reaction on the structure and nucleosynthesis of massive stars. We calculate non-rotating stellar models with initial masses of 15…
An updated picture of pre-solar history from short-lived radioactive isotopes and inferences on the birth of the Sun
Benjámin Soós, Thomas C. L. Trueman, Andrés Yagüe López +2
We examine the origin of the short-lived radionuclides (SLRs, defined as having half-lives between 0.1 and 100 Ma) present in the early Solar System (ESS) by investigating how pred…
Production of heavy -elements and Ti in Cas A: comparison to abundances from 1D core-collapse supernova models and evidence for Carbon-Oxygen shell mergers
Luca Boccioli, Lorenzo Roberti, Chris L Fryer +3
The merger between the carbon (C) and oxygen (O) shells hours to days before the collapse of a massive star significantly changes its nucleosynthesis, which is reflected in the ele…
Stellar Interpretation of Meteoritic Data and PLotting for Everyone (SIMPLE): Isotope Mixing Lines for Six Sets of Core-Collapse Supernova Models
Marco Pignatari, Mattias Ek, Georgy V. Makhatadze +15
Bulk meteorites and their inclusions exhibit, for many chemical elements, isotopic variability produced by nucleosynthetic events in stars and supernovae before the formation of th…
Strontium-84 Enrichments in Presolar Grains Provide First Evidence of p-process Nucleosynthesis in Core-collapse Supernovae
Ishita Pal, Manavi Jadhav, Danielle Z. Shulaker +9
This study reports detection of rare p-process isotopes within presolar grains. Presolar grains are relic dust grains from dying stars. These microscopic dust particles are found i…
Impact of Newly Measured Nuclear Reaction Rates on Al Ejected Yields from Massive Stars
Umberto Battino, Lorenzo Roberti, Thomas V. Lawson +2
Over the last three years, the rates of all the main nuclear reactions involving the destruction and production of Al in stars (Al(n, p)Mg, Al(n, )$^…
Constraining the Synthesis of the Lightest p Nucleus 74Se
A. Tsantiri, A. Spyrou, E. C. Good +42
We provide the first experimental cross section of the reaction to constrain one of the main destruction mechanisms of the p nucleus $^{74}\text…
Unveiling the nature of HE 0107-5240
E. Caffau, M. Steffen, P. Molaro +27
The vast majority of the most iron-poor stars in the Galaxy exhibit a strong carbon enhancement, with C/H ratios only about two orders of magnitude below solar. This unusual chemic…
Production of radioactive Na in core-collapse supernovae: the Ne-E(L) component in presolar grains and its possible consequences on supernova observations
M. Pignatari, S. Amari, P. Hoppe +8
Presolar graphite grains carry the isotopic signatures of their parent stars. A significant fraction of presolar graphites shows isotopic abundance anomalies relative to solar for…
Explodability matters: how realistic neutrino-driven explosions change explosive nucleosynthesis yields
Luca Boccioli, Lorenzo Roberti
Explosive nucleosynthesis is affected by many uncertainties, particularly regarding assumptions and prescriptions adopted during the evolution of the star. Moreover, simple explosi…
Impact of the latest 22Ne+α reaction rates on nucleosynthesis in massive stars and galactic chemical evolution
Emma Kotar, Shuya Ota, Allyson Dewey +3
In massive stars (initial mass of > 9 solar masses), the weak s (slow neutron capture) process produces elements between Fe and Zr, enriching the Galaxy with these elements through…
The SPAr burning: proton captures powering carbon-oxygen shell mergers in massive stars
L. Roberti, M. Pignatari
Carbon-oxygen (C-O) shell mergers in massive stars play a crucial role in both nucleosynthesis and the final stages of stellar evolution. These convective-reactive events significa…
The role of rotation on the yields of the two γ-ray emitters 26Al and 60Fe ejected by massive stars
Agnese Falla, Lorenzo Roberti, Marco Limongi +1
We show that the observed 60Fe/26Al flux ratio provided by the SPectrometer on INTEGRAL satellite (0.24 +- 0.04) can be reproduced only if rotation is taken into account in the com…
The chemical yields of stars in the range 9-15 Msun
Marco Limongi, Lorenzo Roberti, Agnese Falla +2
In Limongi et al. (2024) we presented and discussed the main evolutionary properties and final fate of stars in the mass range 7-15 Msun. The evolutions of those models were comput…
Stellar population modelling of neutron stars and black holes: spatially-resolved graveyards in MaNGA/SDSS-IV galaxies
Claudia Maraston, Marco Limongi, Justus Neumann +4
We update our stellar population models for the time evolution of the number and mass of massive remnants - neutron stars and black holes - with a new initial mass-remnant mass rel…
The Occurrence and Impact of Carbon-Oxygen Shell Mergers in Massive Stars
L. Roberti, M. Pignatari, H. E. Brinkman +6
In their final stages before undergoing a core-collapse supernova, massive stars may experience mergers between internal shells where carbon (C) and oxygen (O) are consumed as fuel…
Explaining the ratio in the Galactic halo: the contribution from shell mergers in primordial massive stars
F. Rizzuti, G. Cescutti, P. Molaro +5
Recent campaigns of observations have provided new measurements of the carbon isotopes in the most metal-poor stars of the Galaxy. These stars are so metal-poor that they could onl…
The impact of asteroseismically calibrated internal mixing on nucleosynthetic wind yields of massive stars
Hannah E. Brinkman, Lorenzo Roberti, Alex Kemp +3
Asteroseismology gives us the opportunity to look inside stars and determine their internal properties. Based on these observations, estimations can be made for the amount of the c…
The -process nucleosynthesis in core-collapse supernovae II. Effect of the explosive recipe
Lorenzo Roberti, Marco Pignatari, Chris L. Fryer +1
The -process in core-collapse supernovae (CCSNe) can produce a number of neutron-deficient stable isotopes heavier than iron (p-nuclei). However, current model predictions do to…
Presupernova evolution and explosive nucleosynthesis of rotating massive stars II: the Super Solar models at [Fe/H]=0.3
Lorenzo Roberti, Marco Limongi, Alessandro Chieffi
We present an extension of the set of models published in Limongi & Chieffi, 2018, ApJS, 237, 13, at metallicity two times solar, i.e. [Fe/H]=0.3. The key physical properties of th…
The physics of Core-Collapse Supernovae: explosion mechanism and explosive nucleosynthesis
Luca Boccioli, Lorenzo Roberti
Recent developments in multi-dimensional simulations of core-collapse supernovae have considerably improved our understanding of this complex phenomenon. In addition to that, one-d…
Zero and extremely low metallicity rotating massive stars: evolution, explosion, and nucleosynthesis up to the heaviest nuclei
Lorenzo Roberti, Marco Limongi, Alessandro Chieffi
We present the evolution and the explosion of two massive stars, 15 and 25 M, spanning a wide range of initial rotation velocities (from 0 to 800 km/s) and three initial…
Evolution and final fate of solar metallicity stars in the mass range 7-15 Msun. I. The transition from AGB to SAGB stars, Electron Capture and Core Collapse Supernovae progenitors
Marco Limongi, Lorenzo Roberti, Alessandro Chieffi +1
According to a standard initial mass function, stars in the range 7-12 Msun constitute ~50% (by number) of the stars more massive than ~7 Msun, but, in spite of this, their evoluti…
The -process nucleosynthesis in core-collapse supernovae. I. A novel analysis of -process yields in massive stars
L. Roberti, M. Pignatari, A. Psaltis +4
The -process nucleosynthesis in core-collapse supernovae is generally accepted as a feasible process for the synthesis of neutron-deficient isotopes beyond iron. However, crucia…