"Super-Kilonovae" from Massive Collapsars as Signatures of Black-Hole Birth in the Pair-instability Mass Gap

Abstract

The core collapse of rapidly rotating massive ~10 Msun stars ("collapsars"), and resulting formation of hyper-accreting black holes, are a leading model for the central engines of long-duration gamma-ray bursts (GRB) and promising sources of r-process nucleosynthesis. Here, we explore the signatures of collapsars from progenitors with extremely massive helium cores >130 Msun above the pair-instability mass gap. While rapid collapse to a black hole likely precludes a prompt explosion in these systems, we demonstrate that disk outflows can generate a large quantity (up to >50 Msun) of ejecta, comprised of >5-10 Msun in r-process elements and ~0.1-1 Msun of ${}^{56}$Ni, expanding at velocities ~0.1c. Radioactive heating of the disk-wind ejecta powers an optical/infrared transient, with a characteristic luminosity $\sim 10^{42}$ erg s${}^{-1}$ and spectral peak in the near-infrared (due to the high optical/UV opacities of lanthanide elements) similar to kilonovae from neutron star mergers, but with longer durations $\gtrsim$ 1 month. These "super-kilonovae" (superKNe) herald the birth of massive black holes >60 Msun, which, as a result of disk wind mass-loss, can populate the pair-instability mass gap 'from above' and could potentially create the binary components of GW190521. SuperKNe could be discovered via wide-field surveys such as those planned with the Roman Space Telescope or via late-time infrared follow-up observations of extremely energetic GRBs. Gravitational waves of frequency ~0.1-50 Hz from non-axisymmetric instabilities in self-gravitating massive collapsar disks are potentially detectable by proposed third-generation intermediate and high-frequency observatories at distances up to hundreds of Mpc; in contrast to the "chirp" from binary mergers, the collapsar gravitational-wave signal decreases in frequency as the disk radius grows ("sad trombone").

36 pages, 21 figures, 2 tables

References in corpus (63)

• The Supernova -- Gamma-Ray Burst Connection
• GW190521: A Binary Black Hole Merger with a Total Mass of $150M_{\odot }$
• The mass distribution and gravitational potential of the Milky Way
• Wide-Field InfrarRed Survey Telescope-Astrophysics Focused Telescope Assets WFIRST-AFTA 2015 Report
• The Electromagnetic Counterpart of the Binary Neutron Star Merger LIGO/VIRGO GW170817. II. UV, Optical, and Near-IR Light Curves and Comparison to Kilonova Models
• The r-process of stellar nucleosynthesis: Astrophysics and nuclear physics achievements and mysteries
• Long gamma-ray bursts and core-collapse supernovae have different environments
• Light Curves of the Neutron Star Merger GW170817/SSS17a: Implications for R-Process Nucleosynthesis
• Gravitational-wave sensitivity curves
• Pulsational Pair-Instability Supernovae
• Comprehensive nucleosynthesis analysis for ejecta of compact binary mergers
• The Combined Ultraviolet, Optical, and Near-Infrared Light Curves of the Kilonova Associated with the Binary Neutron Star Merger GW170817: Unified Data Set, Analytic Models, and Physical Implications
• Magnetorotationally driven Supernovae as the origin of early galaxy $r$-process elements?
• Kilonovae
• No supernovae associated with two long-duration gamma ray bursts
• Candidate Electromagnetic Counterpart to the Binary Black Hole Merger Gravitational Wave Event S190521g
• Mind the gap: The location of the lower edge of the pair instability supernovae black hole mass gap
• Time Dependent Monte Carlo Radiative Transfer Calculations For 3-Dimensional Supernova Spectra, Lightcurves, and Polarization
• Neutrino-Cooled Accretion Disks around Spinning Black Hole
• Merging black holes in young star clusters
• An excess of massive stars in the local 30 Doradus starburst
• Hierarchical mergers of stellar-mass black holes and their gravitational-wave signatures
• Making a Short Gamma-Ray Burst from a Long one: Implications for the Nature of GRB 060614
• Time-Dependent Models of Accretion Disks Formed from Compact Object Mergers
• Mass Fall-back and Accretion in the Central Engine of Gamma-Ray Bursts
• The Pair-Instability Mass Gap for Black Holes
• The History of R-Process Enrichment in the Milky Way
• The redshift evolution of the binary black hole merger rate: a weighty matter
• Integrated Nucleosynthesis in Neutrino Driven Winds
• Outflows from accretion disks formed in neutron star mergers: effect of black hole spin
• The Proto-neutron Star Phase of the Collapsar Model and the Route to Long-soft Gamma-ray Bursts and Hypernovae
• On Variations Of Pre-Supernova Model Properties
• On the Conditions for Neutron-Rich Gamma-Ray Burst Outflows
• Neutrino Fast Flavor Conversions in Neutron-star Post-Merger Accretion Disks
• GW190521 may be an intermediate mass ratio inspiral
• Cosmological Evolution of Long Gamma-ray Bursts and Star Formation Rate
• The impact of stellar rotation on the black hole mass-gap from pair-instability supernovae
• Observing intermediate-mass black holes and the upper--stellar-mass gap with LIGO and Virgo
• Black hole to breakout: 3D GRMHD simulations of collapsar jets reveal a wide range of transients
• Neutrino absorption and other physics dependencies in neutrino-cooled black-hole accretion disks
• Electromagnetic Signatures of Relativistic Explosions in AGN Disks
• The Stellar Merger Scenario for Black Holes in the Pair-instability Gap
• An alternative interpretation of GW190412 as a binary black hole merger with a rapidly spinning secondary
• Accretion onto Stars in the Disks of Active Galactic Nuclei
• SN 2013ab : A normal type IIP supernova in NGC 5669
• The Optical/Near-Infrared Light Curves of SN 2002ap for the First 1.5 Years after Discovery
• The final core collapse of pulsational pair instability supernovae
• Stellar Evolution in the Disks of Active Galactic Nuclei Produces Rapidly Rotating Massive Stars
• Nebular Emission from Lanthanide-rich Ejecta of Neutron Star Merger
• Enrichment in r-process elements from multiple distinct events in the early Draco dwarf spheroidal galaxy
• Signatures of R-process Enrichment in Supernovae from Collapsars
• Nuclear Burning in Collapsar Accretion Disks
• The R-Process Alliance: J1521-3538, a very metal-poor, extremely r-process-enhanced star with [Eu/Fe]=+2.2, and the class of r-III stars
• Constraining Collapsar r-Process Models through Stellar Abundances
• Dust formation in macronovae
• Lanthanides or dust in kilonovae: lessons learned from GW170817
• Alternative possibility of GW190521: Gravitational waves from high-mass black hole-disk systems
• Ultra-delayed neutrino-driven explosion of rotating massive-star collapse
• A search for FRB 121102-like persistent radio-luminous sources -- Candidates and implications for the FRB rate and searches
• Evidence for r-process delay in very metal-poor stars
• Gravitational Waves from Disks Around Spinning Black Holes: Simulations in Full General Relativity
• Contribution of collapsars, supernovae, and neutron star mergers to the evolution of r-process elements in the Galaxy
• Proto-magnetar jets as central engines for broad-lined type Ic supernovae

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• Impacts of the ${}^{12}\mathrm{C}{\left(\alpha ,\gamma \right)}^{16}\mathrm{O}$ reaction rate on ${}^{56}\mathrm{Ni}$ nucleosynthesis in pair-instability supernovae
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