Nucleosynthesis Contribution of Neutrino-dominated Accretion Flows to the Chemical Evolution of Active Galactic Nuclei

Abstract

Recent observations of quasars show high line-flux ratios in their broad emission lines and the ratios appear to be independent of redshift up to $z\gtrsim 6$, which indicate that the broad-line regions of these early quasars are surprisingly metal-rich. Here, we revisit the chemical evolution of high-redshift quasars by adding a new ingredient, i.e., the neutrino-dominated accretion flows (NDAFs) with outflows, on top of the conventional core-collapse supernovae (CCSNe). In the presence of the chemical contribution from NDAFs with outflows, the total metal mass (i.e., the summation of the conventional CCSN and NDAFs with outflows) per CCSN depends weakly upon the mass of the progenitor star if the mass is in the range of $\sim 25-55M_{\odot }$. We model the chemical evolution by adopting a improved open-box model with three typical initial mass functions (IMFs). We find that, with the additional chemical contribution from NDAFs with outflows, the quasar metallicity can be enriched more rapidly in the very early Universe ($z\sim 10$) and reaches higher saturation than the no-NDAF case at $z\sim 8$, after which they evolve slowly with redshift. The quasar metallicity can reach $\sim 20Z_{\odot }$ ($Z_{\odot }$ denotes the metallicity of the Sun; and $\sim 20\%$ of which is produced by NDAF outflows) at $z\sim 8$ for the ``top-heavy'' IMF model in \citet{Toyouchi2022}, which readily explains the quasar observations on the super-solar metal abundance and redshift-independent evolution.

arXiv comment6 pages, 2 figures, accepted for publication in ApJ

References in corpus (43)

• Type Ia Supernova Explosion Models
• Core-Collapse Supernovae from 9 to 120 Solar Masses Based on Neutrino-powered Explosions
• The Star Formation Rate and Dense Molecular Gas in Galaxies
• An ultra-luminous quasar with a twelve-billion-solar-mass black hole at redshift 6.30
• Nucleosynthesis Yields of Core-Collapse Supernovae and Hypernovae, and Galactic Chemical Evolution
• Nucleosynthesis and Evolution of Massive Metal-Free Stars
• De Re Metallica: The cosmic chemical evolution of galaxies
• Comprehensive nucleosynthesis analysis for ejecta of compact binary mergers
• Stellar disk in the galactic center -- a remnant of a dense accretion disk?
• Three-dimensional GRMHD simulations of the remnant accretion disks from neutron star mergers: outflows and r-process nucleosynthesis
• Gemini Near-infrared Spectroscopy of Luminous z~6 Quasars: Chemical Abundances, Black Hole Masses, and MgII Absorption
• Supermassive Stars in Quasar Disks
• Stellar populations dominated by massive stars in dusty starburst galaxies across cosmic time
• Black hole masses and enrichment of z ~ 6 SDSS quasars
• Black hole mass estimates and emission-line properties of a sample of redshift z>6.5 quasars
• The Evolution of the Broad-Line Region among SDSS Quasars
• Metallicities and Abundance Ratios from Quasar Broad Emission Lines
• Nucleosynthesis in the Outflow from Gamma Ray Burst Accretion Disks
• Formation of supermassive black hole seeds
• Observational Constraints on the Feeding of Supermassive Black Holes
• Neutrino-dominated accretion flows as the central engine of gamma-ray bursts
• Black hole, neutron star and white dwarf merger rates in AGN disks
• A hybrid model for the evolution of galaxies and Active Galactic Nuclei in the infrared
• Outflows from accretion disks formed in neutron star mergers: effect of black hole spin
• Stellar Evolution in AGN Disks
• Nucleosynthesis in Outflows from the Inner Regions of Collapsars
• In situ formation of SgrA* stars via disk fragmentation: parent cloud properties and thermodynamics
• A Relation Between Supermassive Black Hole Mass and Quasar Metallicity?
• The Evolution of Chemical Abundance in Quasar Broad Line Region
• The mass-metallicity relation of SDSS quasars
• Testing the universal stellar IMF on the metallicity distribution in the bulges of the Milky Way and M31
• Stellar Evolution in the Disks of Active Galactic Nuclei Produces Rapidly Rotating Massive Stars
• Star formation in self-gravitating disks in active galactic nuclei. I. Metallicity gradients in broad line regions
• Neutrino Interactions in the Outflow from Gamma-Ray Burst Accretion Disks
• Star formation in self-gravitating disks in active galactic nuclei. II. Episodic formation of broad line regions
• Metallicity in Quasar Broad Line Regions at Redshift $\sim$ 6
• Nucleosynthesis of Nickel-56 from Gamma-Ray Burst Accretion Disks
• Accretion Disks in Active Galactic Nuclei: Gas Supply Driven by Star Formation
• Advection-Dominated Accretion Disks: Geometrically Slim or Thick?
• Self-gravity in neutrino-dominated accretion disks
• Revisiting vertical structure of neutrino-dominated accretion disks: Bernoulli parameter, neutrino trapping and other distributions
• Black hole hyperaccretion inflow-outflow model. II. Long-duration gamma-ray bursts and supernova ${}^{56}\mathrm{Ni}$ bumps
• Neutrino-dominated accretion flows: second nucleosynthesis factory in core-collapse supernovae and regulation of iron markets in galaxies

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• In-situ star formation in accretion disk and explanation for correlation between black hole mass and metallicity in AGNs