Proton-rich production of lanthanides: the $\nu i$ process

Abstract

The astrophysical origin of the lanthanides is an open question in nuclear astrophysics. Besides the widely studied $s$, $i$, and $r$ processes in moderately-to-strongly neutron-rich environments, an intriguing alternative site for lanthanide production could in fact be robustly $\text{proton-rich}$ matter outflows from core-collapse supernovae under specific conditions -- in particular, high-entropy winds with enhanced neutrino luminosity and fast dynamical timescales. In this environment, excess protons present after charged particle reactions have ceased can continue to be converted to neutrons by (anti-)neutrino interactions, producing a neutron capture reaction flow up to A~200. This scenario, christened the $\nu i$ process in a recent paper, has previously been discussed as a possibility. Here, we examine the prospects for $\nu i$ process through the lens of stellar abundance patterns, bolometric lightcurves, and galactic chemical evolution models, with a particular focus on hypernovae as candidate sites. We identify specific lanthanide signatures for which the $\nu i$ process can provide a credible alternative to $r$/$i$ processes.

arXiv comment15 pages, 5 figures, v3 matches version to appear in ApJL

References in corpus (92)

• GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
• Galactic chemical evolution: Carbon through Zinc
• Stellar Chemical Signatures And Hierarchical Galaxy Formation
• Double Compact Objects I: The Significance Of The Common Envelope On Merger Rates
• Origin of the Heaviest Elements: the Rapid Neutron-Capture Process
• Comprehensive nucleosynthesis analysis for ejecta of compact binary mergers
• Neutrino-induced nucleosynthesis of A>64 nuclei: The nu p-process
• Opacities and Spectra of the r-process Ejecta from Neutron Star Mergers
• Carbon Enhanced Metal-Poor Stars. I. Chemical Compositions of 26 Stars
• Radiative Transfer Simulations for Neutron Star Merger Ejecta
• First-generation black-hole-forming supernovae and the metal abundance pattern of a very iron-poor star
• The early star generations: the dominant effect of rotation on the CNO yields
• Collapsars as a major source of r-process elements
• Delayed outflows from black hole accretion tori following neutron star binary coalescence
• Variations in the Abundance Pattern of Extremely Metal-poor Stars and Nucleosynthesis in Population III Supernovae
• The long-term evolution of neutron star merger remnants - I. The impact of r-process nucleosynthesis
• The s-Process in Low Metallicity Stars. II. Interpretation of High-Resolution Spectroscopic Observations with AGB models
• The Broad-lined Type Ic SN 2003jd
• The long-term evolution of neutron star merger remnants - II. Radioactively powered transients
• Non-standard s process in low metallicity massive rotating stars
• The intermediate neutron-capture process and carbon-enhanced metal-poor stars
• The r-Process in Neutrino-Driven Winds from Nascent, "Compact" Neutron Stars of Core-Collapse Supernovae
• New Developments in Flavor Evolution of a Dense Neutrino Gas
• Revisiting the Lick Observatory Supernova Search Volume-Limited Sample: Updated Classifications and Revised Stripped-Envelope Supernova Fractions
• R-process Nucleosynthesis from Three-Dimensional Magnetorotational Core-Collapse Supernovae
• The $R$-Process Alliance: First Release from the Southern Search for $r$-Process-Enhanced Stars in the Galactic Halo
• The different progenitors of type Ib, Ic SNe, and of GRB
• An Elemental Assay of Very, Extremely, and Ultra Metal-Poor Stars
• Abundance Profiling of Extremely Metal-Poor Stars and Supernova Properties in the Early Universe
• Neutrino Non-Standard Interactions: A Status Report
• The origin and evolution of r- and s-process elements in the Milky Way stellar disk
• The R-Process Alliance: First Release from the Northern Search for r-Process Enhanced Metal-Poor Stars in the Galactic Halo
• Chemical evolution with rotating massive star yields II. A new assessment of the solar s- and r- process components
• s-Process in Low Metallicity Stars. I. Theoretical Predictions
• Uncertainties in the nu p-process: supernova dynamics versus nuclear physics
• High-Resolution Spectroscopic Study of Extremely Metal-Poor Star Candidates from the SkyMapper Survey
• s-Process in Low Metallicity Stars. III. Individual analysis of CEMP-s and CEMP-s/r with AGB models
• The End of Nucleosynthesis: Production of Lead and Thorium in the Early Galaxy
• Four-hundred Very Metal-Poor Stars Studied with LAMOST and Subaru. II. Elemental abundances
• The $R$-Process Alliance: Fourth Data Release from the Search for $r$-Process-Enhanced Stars in the Galactic Halo
• The influence of collective neutrino oscillations on a supernova r-process
• Neutrino Mass Hierarchy
• Primordial Black Holes and $r$-Process Nucleosynthesis
• Self-induced suppression of collective neutrino oscillations in a supernova
• Effects of neutrino oscillations on nucleosynthesis and neutrino signals for an 18 M supernova model
• The Diverse Origins of Neutron-Capture Elements in the Metal-Poor Star HD 94028: Possible Detection of Products of i-process Nucleosynthesis
• Analysis of matter suppression in collective neutrino oscillations during the supernova accretion phase
• The R-process Alliance: First Magellan/MIKE Release from the Southern Search for R-Process-enhanced Stars
• $\beta$-delayed fission in $r$-process nucleosynthesis
• The first stars: CEMP--no stars and signatures of spinstars
• Project overview and update on WEAVE: the next generation wide-field spectroscopy facility for the William Herschel Telescope
• Neutron star mergers and rare core-collapse supernovae as sources of r-process enrichment in simulated galaxies
• Neutrino absorption and other physics dependencies in neutrino-cooled black-hole accretion disks
• Nine New Metal-Poor Stars on the Subgiant and Red Horizontal Branches with High Levels of r-process Enhancement
• Magnetorotational supernovae: A nucleosynthetic analysis of sophisticated 3D models
• Symmetric and Standard Matter-Neutrino Resonances Above Merging Compact Objects
• The s Process and Beyond
• Learning about the intermediate neutron-capture process from lead abundances
• Collisional instabilities of neutrinos and their interplay with fast flavor conversion in compact objects
• Are some CEMP-s stars the daughters of spinstars?
• Validating Semi-Analytic Models of High-Redshift Galaxy Formation using Radiation Hydrodynamical Simulations
• Neutrinos and nucleosynthesis of elements
• Nuclear physics uncertainties in neutrino-driven, neutron-rich supernova ejecta
• Estimating outflow masses and velocities in merger simulations: impact of r-process heating and neutrino cooling
• Impact of supernova dynamics on the νp-process
• The intermediate neutron capture process. III. The i-process in AGB stars of different masses and metallicities without overshoot
• The R-Process Alliance: Discovery of the first metal-poor star with a combined r- and s-process element signature
• Neutrino Flavor Evolution in Neutron Star Mergers
• Following nuclei through nucleosynthesis: a novel tracing technique
• Signatures of R-process Enrichment in Supernovae from Collapsars
• Neutrino Oscillations in Core-Collapse Supernovae and Neutron Star Mergers
• Uncertainties in $\nu$p-process nucleosynthesis from Monte Carlo variation of reaction rates
• The $\gamma$-process nucleosynthesis in core-collapse supernovae. I. A novel analysis of $\gamma$-process yields in massive stars
• Quantum information and quantum simulation of neutrino physics
• Two-Moment Neutrino Flavor Transformation with applications to the Fast Flavor Instability in Neutron Star Mergers
• Enhancement of the Triple Alpha Rate in a Hot Dense Medium
• The r-Process in the Proto-Neutron-Star Winds with Anisotropic Neutrino Emission
• The R-Process Alliance: Fifth Data Release from the Search for R-Process-Enhanced Metal-poor Stars in the Galactic Halo with the GTC
• Fast Flavor Transformations
• Collective neutrino oscillations and heavy-element nucleosynthesis in supernovae: exploring potential effects of many-body neutrino correlations
• Nucleosynthesis in neutrino-driven winds in hypernovae
• Numerical Study of Stellar Core Collapse and Neutrino Emission Using the Nuclear Equation of State Obtained by the Variational Method
• Evidence for multiple nucleosynthetic processes from carbon enhanced metal-poor stars in the Carina dwarf spheroidal galaxy
• Long-lived neutron-star remnants from asymmetric binary neutron star mergers: element formation, kilonova signals and gravitational waves
• Nucleosynthesis signatures of neutrino-driven winds from proto-neutron stars: a perspective from chemical evolution models
• Collective Neutrino Oscillations and Nucleosynthesis
• r-Process Nucleosynthesis and Radioactively Powered Transients from Magnetar Giant Flares
• Predicting the outcome of collisional neutrino flavor conversion
• A Modified Initial Mass Function of the First Stars with Explodability Theory under Different Enrichment Scenarios
• JINA-NuGrid Galactic Chemical Evolution Pipeline
• Advection Algorithms for Quantum Neutrino Moment Transport
• Alpha-constrained QSE Nucleosynthesis in High-entropy and Fast-expanding Material