Galactic Chemical Evolution and solar s-process abundances: dependence on the 13C-pocket structure

Abstract

We study the s-process abundances (A > 90) at the epoch of the solar-system formation. AGB yields are computed with an updated neutron capture network and updated initial solar abundances. We confirm our previous results obtained with a Galactic Chemical Evolution (GCE) model: (i) as suggested by the s-process spread observed in disk stars and in presolar meteoritic SiC grains, a weighted average of s-process strengths is needed to reproduce the solar s-distribution of isotopes with A > 130; (ii) an additional contribution (of about 25%) is required in order to represent the solar s-process abundances of isotopes from A = 90 to 130. Furthermore, we investigate the effect of different internal structures of the 13C-pocket, which may affect the efficiency of the 13C(a, n)16O reaction, the major neutron source of the s-process. First, keeping the same 13C profile adopted so far, we modify by a factor of two the mass involved in the pocket; second, we assume a flat 13C profile in the pocket, and we test again the effects of the variation of the mass of the pocket. We find that GCE s-predictions at the epoch of the solar-system formation marginally depend on the size and shape of the 13C-pocket once a different weighted range of 13C-pocket strengths is assumed. We ascertain that, independently of the internal structure of the 13C-pocket, the missing solar-system s-process contribution in the range from A = 90 to 130 remains essentially the same.

Accepted for publication in The Astrophysical Journal (5 Figures, 2 Tables)

References in corpus (8)

• First stars VI - Abundances of C, N, O, Li, and mixing in extremely metal-poor giants. Galactic evolution of the light elements
• The Hamburg/ESO R-process Enhanced Star survey (HERES) III. HE 0338-3945 and the formation of the r+s stars
• Silver and palladium help unveil the nature of a second r-process
• Can Extra Mixing in RGB and AGB Stars Be Attributed to Magnetic Mechanisms?
• The 12C + 12C reaction and the impact on nucleosynthesis in massive stars
• Rubidium and lead abundances in giant stars of the globular clusters M4 and M5
• Analysis of 26 Barium Stars II. Contributions of s-, r- and p-processes in the production of heavy elements
• AGB nucleosynthesis in the Large Magellanic Cloud. Detailed abundance analysis of the RV Tauri star MACHO47.2496.8

Cited by in corpus (123)

• Identification of strontium in the merger of two neutron stars
• Current Status of r-Process Nucleosynthesis
• Chemical abundances of 1111 FGK stars from the HARPS GTO planet search program II: Cu, Zn, Sr, Y, Zr, Ba, Ce, Nd and Eu
• Systematic non-LTE study of the $-2.6\le$ [Fe/H] $\le 0.2$ F and G dwarfs in the solar neighbourhood. II. Abundance patterns from Li to Eu
• Evolution and nucleosynthesis of asymptotic giant branch stellar models of low metallicity
• Chemical evolution with rotating massive star yields II. A new assessment of the solar s- and r- process components
• The GALAH survey: tracing the Galactic disk with Open Clusters
• The temporal evolution of neutron-capture elements in the Galactic discs
• StarHorse results for spectroscopic surveys + Gaia DR3: Chrono-chemical populations in the solar vicinity, the genuine thick disk, and young-alpha rich stars
• Modelling the spectra of the kilonova AT2017gfo -- I: The photospheric epochs
• How many nucleosynthesis processes exist at low metallicity?
• New insights on Ba over-abundance in open clusters. Evidence for the intermediate neutron-capture process at play?
• Elevated r-process enrichment in Gaia Sausage and Sequoia
• Remnants and ejecta of thermonuclear electron-capture supernovae: Constraining oxygen-neon deflagrations in high-density white dwarfs
• The Hamburg/ESO R-process Enhanced Star survey (HERES) X. HE 2252-4225, one more r-process enhanced and actinide-boost halo star
• The formation of the Milky Way halo and its dwarf satellites; a NLTE-1D abundance analysis. II. Early chemical enrichment
• Correlated Strontium and Barium Isotopic Compositions of Acid-Cleaned Single Silicon Carbides from Murchison
• On the need of the Light Elements Primary Process (LEPP)
• High-resolution abundance analysis of red giants in the globular cluster NGC 6522
• Galactic Chemical Evolution: the Impact of the 13C-pocket Structure on the s-process Distribution
• The Chemical Composition of the Galactic Bulge and Implications for its Evolution
• Abundance-age relations with red clump stars in open clusters
• The Similarity of Abundance Ratio Trends and Nucleosynthetic Patterns in the Milky Way Disk and Bulge
• The chemical composition of red giants in 47 Tucanae I: Fundamental parameters and chemical abundance patterns
• The 13C-Pocket Structure in AGB Models: Constraints from Zirconium Isotope Abundances in Single Mainstream SiC Grains
• Origin of neutron capture elements with the Gaia-ESO survey: the evolution of s- and r-process elements across the Milky Way
• Radiogenic p-isotopes from SNIa, nuclear physics uncertainties and Galactic chemical evolution compared with values in primitive meteorites
• Evidence for $\gtrsim 4$ Gyr timescales of neutron star mergers from Galactic archaeology
• The Gaia-ESO Survey: Age-chemical-clock relations spatially resolved in the Galactic disc
• Element abundance patterns in stars indicate fission of nuclei heavier than uranium
• Discovery of a 760 nm P Cygni line in AT2017gfo: Identification of yttrium in the kilonova photosphere
• The Gaia-ESO Survey: A new approach to chemically characterising young open clusters II. Abundances of the neutron-capture elements Cu, Sr, Y, Zr, Ba, La, and Ce
• Abundances of disk and bulge giants from high-resolution optical spectra -- IV. Zr, La, Ce, Eu
• Enrichment in r-process elements from multiple distinct events in the early Draco dwarf spheroidal galaxy
• Stellar abundances and presolar grains trace the nucleosynthetic origin of molybdenum and ruthenium
• Abundances of neutron-capture elements in thin- and thick-disc stars in the solar neighbourhood
• The S2 Stream: the shreds of a primitive dwarf galaxy
• The detailed chemical abundance patterns of accreted halo stars from the optical to infrared
• The chemical composition of globular clusters in the Local Group
• Exploring the s-process history in the Galactic disk: Cerium abundances and gradients in Open Clusters from the OCCAM/APOGEE sample
• The $\gamma$-process nucleosynthesis in core-collapse supernovae. I. A novel analysis of $\gamma$-process yields in massive stars
• Fluorine in the solar neighbourhood: the need for several cosmic sources
• Observing the metal-poor solar neighbourhood: a comparison of galactic chemical evolution predictions
• The Hamburg/ESO R-process Enhanced Star survey (HERES) IX. Constraining pure r-process Ba/Eu abundance ratio from observations of r-II stars
• The R-Process Alliance: Abundance Universality among Some Elements at and between the First and Second R-Process Peaks
• Spectroscopic r-Process Abundance Retrieval for Kilonovae I: The Inferred Abundance Pattern of Early Emission from GW170817
• Heavy elements in barium stars
• OCCASO V. Chemical-abundance trends with Galactocentric distance and age
• s-Processing from MHD-induced mixing and isotopic abundances in presolar SiC grains
• Neutron-capture elements in dwarf galaxies II: Challenges for the s- and i-processes at low metallicity
• Residual Abundances in GALAH DR3: Implications for Nucleosynthesis and Identification of Unique Stellar Populations
• The CARMENES search for exoplanets around M dwarfs: Rubidium abundances in nearby cool stars
• Extreme r-process enhanced stars at high metallicity in Fornax
• Trans-iron Ge, As, Se, and heavier elements in the dwarf metal-poor stars, HD~19445, HD~84937, HD~94028, HD~140283, and HD~160617
• The study of key reactions shaping the post main-sequence evolution of massive stars in underground facilities
• High-temperature ${}^{205}$Tl decay clarifies ${}^{205}$Pb dating in early Solar System
• Impact of hypernova νp-process nucleosynthesis on the galactic chemical evolution of Mo and Ru
• Enrichment of the Galactic disc with neutron capture elements: Sr
• Galactic Chemical Evolution of Radioactive Isotopes with an s-process Contribution
• Chemical Evolution of Ytterbium in the Galactic Disk
• Comprehensive abundance analysis of red giants in the open clusters Stock 2, NGC 2168, 6475, 6991 and 7762
• 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?
• Extending the Chemical Reach of the H3 Survey: Detailed Abundances of the Dwarf-galaxy Stellar Stream Wukong/LMS-1
• 3D NLTE modelling of Y and Eu. Centre-to-limb variation and solar abundances
• What is the Milky Way outer halo made of? High resolution spectroscopy of distant red giants
• Gaia-Sausage-Enceladus star formation history as revealed by detailed elemental abundances
• HERBS II: Detailed chemical compositions of Galactic bulge stars
• Underground Measurements of Nuclear Reaction Cross-Sections Relevant to AGB Stars
• Discovery of s-process enhanced stars in the LAMOST survey
• The Pristine Inner Galaxy Survey (PIGS) VII: a discovery of the first inner Galaxy CEMP-r/s star
• Exploring the chemodynamics of metal-poor stellar populations
• Detection of Pb II in the Ultraviolet Spectra of Three Metal-Poor Stars
• The Gaia-ESO survey: placing constraints on the origin of r-process elements
• Distribution of s-, r-, and p-process nuclides in the early Solar System inferred from Sr isotope anomalies in meteorites
• Time evolution of Ce as traced by APOGEE using giant stars observed with the Kepler, TESS and K2 missions
• Chemical Evolution of R-process Elements in Stars (CERES): IV. An observational run-up of the third r-process peak with Hf, Os, Ir, and Pt
• Observational constraints on the origin of the elements. VI. Origin and evolution of neutron-capture elements as probed by the Gaia-ESO survey
• High Resolution Spectroscopic Abundances of Red Giant Branch Stars in NGC 6681
• Europium as a lodestar: diagnosis of radiogenic heat production in terrestrial exoplanets
• Solar System chemical abundances corrected for systematics
• The Pristine Inner Galaxy Survey (PIGS) IX. The largest detailed chemical analysis of very metal-poor stars in the Sagittarius dwarf galaxy
• Near-infrared chemical abundances of stars in the Sculptor dwarf galaxy
• The heavy-elements heritage of the falling sky
• Neutron-capture elements in dwarf galaxies III: A homogenized analysis of 13 dwarf spheroidal and ultra-faint galaxies
• Chemical Evolution of R-process Elements in Stars (CERES). III. Chemical abundances of neutron capture elements from Ba to Eu
• Barium stars as tracers of s-process nucleosynthesis in AGB stars III. Systematic deviations from the AGB models
• r-Process enrichment in the Galactic halo characterized by nucleosynthesis variation in the ejecta of coalescing neutron star binaries
• Rotational mixing in carbon-enhanced metal-poor stars with s-process enrichment
• APOGEE view of the globular cluster NGC 6544
• Chemical Tagging N-rich Field Stars with High-resolution Spectroscopy
• Traits for chemical evolution in solar twins: Trends of neutron-capture elements with stellar age
• High-resolution spectroscopic analysis of four new chemically peculiar stars
• Presolar grains
• Enrichment of the Galactic disc with neutron-capture elements: Gd, Dy, and Th
• Exploring the dependence of chemical traits on metallicity: chemical trends for red giant stars with asteroseismic ages
• Something borrowed, something blue: The nature of blue metal-poor stars inferred from their colours and chemical abundances
• Thermonuclear 17O(n,gamma)18O reaction rate and its astrophysical implications
• Kilonova evolution -- the rapid emergence of spectral features
• Unlocking the mystery of Sr synthesis in the early Galaxy through analysis of barium isotopes in very metal-poor stars
• The NuGrid AGB Evolution and Nucleosynthesis Data Set
• The s process in massive stars, a benchmark for neutron capture reaction rates
• Discovery of a pair of very metal-poor stars enriched in neutron-capture elements: The proto-disk r-II star BPS CS 29529-0089 and the Gaia-Sausage-Enceladus r-I star TYC 9219-2422-1
• Studying stellar populations in Omega Centauri with phylogenetics
• Internal r-process abundance spread of M15 and a single stellar population model
• Abundances of disk and bulge giants from high-resolution optical spectra V. Molybdenum -- the p-process element
• An Actinide-boost Star Discovered in the Gaia-Sausage-Enceladus
• Modeling the progenitors of low-mass post-accretion binaries
• M giants with IGRINS IV. Identification and characterization of a near-IR line of the s-element Barium
• The first r-process enhanced star confirmed to be a member of the Galactic bulge
• Impact of $\text{T}$- and $\rho$-dependent decay rates and new (n,$\gamma$) cross sections on the $\text{s}$ process in low-mass AGB stars
• Full abundance study of two newly discovered barium giants
• An empirical metallicity tracer in CEMP and C-normal stars
• Chemical composition of planetary hosts: II. Abundances of neutron-capture elements
• iota Horologii is unlikely to be an evaporated Hyades star
• Th/Eu abundance ratio of red giants in the Kepler Field
• Measurements of neutron-induced reactions in inverse kinematics and applications to nuclear astrophysics
• Photo-nuclear reaction rates of ${}^{157,159}$Ho and ${}^{163,165}$Tm and their impact in the $\gamma$--process
• Impact of the latest 22Ne+α reaction rates on nucleosynthesis in massive stars and galactic chemical evolution
• The R-Process Alliance: A Nearly Complete R-Process Abundance Template Derived from Ultraviolet Spectroscopy of the R-Process-Enhanced Metal-Poor Star HD 222925
• An ancient system hidden in the Galactic plane?
• Implications of low neutron star merger rates for gamma-ray bursts, r-process production and Galactic double neutron stars
• APOGEE chemical abundances of stars in the MW satellites Fornax, Sextans, Draco and Carina
• A Near-Infrared and Optical Study of NGC 5822: An Open Cluster Hosting Barium-stars and Lithium-Enriched Giant Stars