Titanium and Iron in the Cassiopeia A Supernova Remnant

Abstract

Mixing above the proto-neutron star is believed to play an important role in the supernova engine, and this mixing results in a supernova explosion with asymmetries. Elements produced in the innermost ejecta, e.g., ${}^{56}$Ni and ${}^{44}$Ti, provide a clean probe of this engine. The production of ${}^{44}$Ti is particularly sensitive to the exact production pathway and, by understanding the available pathways, we can use ${}^{44}$Ti to probe the supernova engine. Using thermodynamic trajectories from a three-dimensional supernova explosion model, we review the production of these elements and the structures expected to form under the "convective-engine" paradigm behind supernovae. We compare our results to recent X-ray and $\gamma$-ray observations of the Cassiopeia A supernova remnant.

arXiv commentv1: 14 pages of text, 24 figures, 2 tables; to be published in ApJ

References in corpus (51)

• The NumPy array: a structure for efficient numerical computation
• Mass-loss predictions for O and B stars as a function of metallicity
• Low Temperature Opacities
• Compact Remnant Mass Function: Dependence on the Explosion Mechanism and Metallicity
• The Nuclear Equation of State and Neutron Star Masses
• SPLASH: An interactive visualisation tool for Smoothed Particle Hydrodynamics simulations
• Nucleosynthesis and Remnants in Massive Stars of Solar Metallicity
• Shell-model calculations of stellar weak interaction rates: II. Weak rates for nuclei in the mass range A=45-65 in supernovae environment
• Neutron Star Mass Measurements. I. Radio Pulsars
• Inside the Supernova: A Powerful Convective Engine
• Element Diffusion in the Solar Interior
• Mass Limits For Black Hole Formation
• Theoretical Black Hole Mass Distributions
• Physics of Core-Collapse Supernovae in Three Dimensions: a Sneak Preview
• Turbulent Convection in Stellar Interiors. I. Hydrodynamic Simulation
• Multidimensional Supernova Simulations with Approximative Neutrino Transport I. Neutron Star Kicks and the Anisotropy of Neutrino-Driven Explosions in Two Spatial Dimensions
• New Solar Composition: The Problem With Solar Models Revisited
• The Cassiopeia A Supernova was of Type IIB
• Asymmetries in core-collapse supernovae from maps of radioactive ${}^{44}$Ti in CassiopeiaA
• Solar System Abundances of the Elements
• Neutrino-driven explosion of a 20 solar-mass star in three dimensions enabled by strange-quark contributions to neutrino-nucleon scattering
• Type II Supernovae as Standardized Candles
• A Comparison of Two- and Three-dimensional Neutrino-hydrodynamics simulations of Core-collapse Supernovae
• Towards Realistic Progenitors of Core-Collapse Supernovae
• Constraints on the Progenitor of Cassiopeia A
• The VLT-FLAMES survey of massive stars: Wind properties and evolution of hot massive stars in the LMC
• Production and Distribution of ${}^{44}$Ti and ${}^{56}$Ni in a Three-dimensional Supernova Model Resembling Cassiopeia A
• The Three Dimensional Evolution to Core Collapse of a Massive Star
• The distribution of radioactive ${}^{44}$Ti in Cassiopeia A
• Cassiopeia A and its Clumpy Presupernova Wind
• Trends in Ti44 and Ni56 from Core-Collapse Supernovae
• Crucial Physical Dependencies of the Core-Collapse Supernova Mechanism
• Turbulent Convection in Stellar Interiors. II. The Velocity Field
• Beyond Mixing-length Theory: a step toward 321D
• SNSPH: A Parallel 3-D Smoothed Particle Radiation Hydrodynamics Code
• The Reaction Rate Sensitivity of Nucleosynthesis in Type II Supernovae
• Observational Tests and Predictive Stellar Evolution II: Non-standard Models
• Gamma-Ray Lines from Asymmetric Supernovae
• Late-Time Convection in the Collapse of a 23 Solar Mass Star
• Implications for Post-Processing Nucleosynthesis of Core-Collapse Supernova Models with Lagrangian Particles
• Gamma-Rays from Single Lobe Supernova Explosions
• Uncertainties in Supernova Yields I: 1D Explosions
• Convection Theory and Sub-photospheric Stratification
• Parameterizing the Supernova Engine and its Effects on Remnants and Basic Yields
• Nucleosynthesis in 2D Core-Collapse Supernovae of 11.2 and 17.0 M${}_{\odot }$ Progenitors: Implications for Mo and Ru Production
• A Case Study of Small Scale Structure Formation in 3D Supernova Simulations
• An explanation for the curious mass loss history of massive stars: from OB stars, through Luminous Blue Variables to Wolf-Rayet stars
• Synergies between Asteroseismology and Three-dimensional Simulations of Stellar Turbulence
• The impact of asymmetric neutrino emissions on nucleosynthesis in core-collapse supernovae
• Neutrino induced reactions in core-collapse supernovae: effects on the electron fraction
• Prediction of Astrophysical Reaction Rates: Methods, Data Needs, and Consequences for Nucleosynthesis Studies

Cited by in corpus (7)

• The fully developed remnant of a neutrino-driven supernova: Evolution of ejecta structure and asymmetries in SNR Cassiopeia A
• Magnetorotational supernovae: A nucleosynthetic analysis of sophisticated 3D models
• A JWST Survey of the Supernova Remnant Cassiopeia A
• High-entropy ejecta plumes in Cassiopeia A from neutrino-driven convection
• Reaction Rate Sensitivity of the Production of $\gamma$-ray Emitting Isotopes in Core-Collapse Supernova
• Discovery of Stable Titanium at the Northeastern Jet of Cassiopeia A: Need for a Weak Jet Mechanism?
• Three-dimensional Supernova Models Provide New Insights into the Origins of Stardust