Understanding nebular spectra of Type Ia supernovae

Abstract

In this study, we present one-dimensional, non-local-thermodynamic-equilibrium, radiative transfer simulations (using CMFGEN) in which we introduce micro-clumping at nebular times into two Type Ia supernova ejecta models. We use one sub-Chandrasekhar (sub-M${}_{\mathrm{Ch}}$) ejecta with 1.02 M${}_{\odot }$ and one M${}_{\mathrm{Ch}}$ ejecta model with 1.40 M${}_{\odot }$. We introduce clumping factors $f=$0.33,0.25, and 0.10 which are constant throughout the ejecta and compared to the unclumped $f=1.0$ case. We find that clumping is a natural mechanism to reduce the ionization of the ejecta, reducing emission from [Fe III], [Ar III], and [S III] by a factor of a few. For decreasing values of the clumping factor $f$, the [Ca II] $\lambda \lambda$7291,7324 doublet became a dominant cooling line for our M${}_{\mathrm{Ch}}$ model but still weak in our sub-M${}_{\mathrm{Ch}}$ model. Strong [Ca II] $\lambda \lambda$7291,7324 indicates non-thermal heating in that region and may constrain explosion modelling. Due to the low abundance of stable nickel, our sub-M${}_{\mathrm{Ch}}$ model never showed the [Ni II] 1.939 micron diagnostic feature for all clumping values.

arXiv comment19 pages, 14 figures, will be submitted to MNRAS

References in corpus (45)

• Nucleosynthesis in Chandrasekhar Mass Models for Type Ia Supernovae and Constraints on Progenitor Systems and Burning-Front Propagation
• WISeREP - An Interactive Supernova Data Repository
• Three-dimensional delayed-detonation models with nucleosynthesis for Type Ia supernovae
• Double-detonation sub-Chandrasekhar supernovae: can minimum helium shell masses detonate the core?
• Quantitative Spectroscopy of O Stars at Low Metallicity. O Dwarfs in NGC 346
• The Diversity of Type Ia Supernovae from Broken Symmetries
• The Spectroscopic Diversity of Type Ia Supernovae
• Double-detonation supernovae of sub-Chandrasekhar mass white dwarfs
• An asymmetric explosion as the origin of spectral evolution diversity in type Ia supernovae
• Abundance stratification in Type Ia supernovae - I. The case of SN 2002bo
• Nucleosynthesis in Two-Dimensional Delayed Detonation Models of Type Ia Supernova Explosions
• One-dimensional delayed-detonation models of Type Ia supernovae: Confrontation to observations at bolometric maximum
• Evidence for Spectropolarimetric Diversity in Type Ia Supernovae
• Three-dimensional modeling of Type Ia supernovae - The power of late time spectra
• The normal Type Ia SN 2003hv out to very late phases
• Gravitational Settling of 22Ne in Liquid White Dwarf Interiors
• Signatures of Delayed Detonation, Asymmetry, and Electron Capture in the Mid-Infrared Spectra of Supernovae 2003hv and 2005df
• Evidence for sub-Chandrasekhar-mass progenitors of Type Ia supernovae at the faint end of the width-luminosity relation
• Nebular spectra and abundance tomography of the type Ia supernova SN 2011fe: a normal SN Ia with a stable Fe core
• Nebular velocities in type Ia Supernovae and their relationship to light curves
• Type Ia Supernovae with Bi-Modal Explosions Are Common -- Possible Smoking Gun for Direct Collisions of White-Dwarfs
• Measuring nickel masses in Type Ia supernovae using cobalt emission in nebular phase spectra
• Using late-time optical and near-infrared spectra to constrain Type Ia supernova explosion properties
• Infrared and Optical Spectroscopy of Type Ia Supernovae in the Nebular Phase
• Nebular-Phase Spectra of Nearby Type Ia Supernovae
• Reconciling the infrared catastrophe and observations of SN 2011fe
• 'Super-Chandrasekhar' Type Ia Supernovae at nebular epochs
• [OI] 6300,6364 in the nebular spectrum of a subluminous Type Ia supernova
• A Model for Multidimensional Delayed Detonations in SN Ia Explosions
• The (54Fe+58Ni)/56Ni ratio as a second parameter for Type Ia supernova properties
• The nebular spectrum of the type Ia supernova 2003hv: evidence for a non-standard event
• How do Type Ia Supernova Nebular Spectra Depend on Explosion Properties? Insights from Systematic non-LTE Modeling
• Spectral Consequences of Deviation from Spherical Composition Symmetry in Type Ia Supernovae
• The detonation of a sub-Chandrasekhar-mass white dwarf at the origin of the low-luminosity Type Ia supernova 1999by
• Ejecta Mass Diagnostics of Type Ia Supernovae
• Impact of clumping on core-collapse supernova radiation
• Near-infrared spectral evolution of the Type Ia supernova 2014J in the nebular phase: implications for the progenitor system
• Progressive Red Shifts in the Late-Time Spectra of Type Ia Supernovae
• The nebular spectra of the transitional Type Ia Supernovae 2007on and 2011iv: broad, multiple components indicate aspherical explosion cores
• Optical and NIR observations of the nearby type Ia supernova SN 2014J
• Physical Structure of the Planetary Nebula NGC 3242 from the Hot Bubble to the Nebular Envelope
• Asymmetries in SN 2014J Near Maximum Light Revealed Through Spectropolarimetry
• C+O detonations in thermonuclear supernovae: Interaction with previously burned material
• Comprehensive modelling of the planetary nebula LMC-SMP 61 and its [WC]-type central star
• Narrow Transient Absorptions in Late-Time Optical Spectra of Type Ia Supernovae: Evidence for Large Clumps of Iron-Rich Ejecta?

Cited by in corpus (18)

• Non-Local Thermodynamic Equilibrium Radiative Transfer Simulations of Sub-Chandrasekhar-Mass White Dwarf Detonations
• Monte Carlo radiative transfer for the nebular phase of Type Ia supernovae
• Metallicity-dependent nucleosynthetic yields of Type Ia supernovae originating from double detonations of sub-M${}_{\text{Ch}}$ white dwarfs
• Strong Calcium Emission Indicates that the Ultraviolet-Flashing Type Ia SN 2019yvq was the Result of a Sub-Chandrasekhar Mass Double-Detonation Explosion
• A JWST Near- and Mid-Infrared Nebular Spectrum of the Type Ia Supernova 2021aefx
• Stable nickel production in Type Ia supernovae: A smoking gun for the progenitor mass?
• JWST Low-Resolution MIRI Spectral Observations of SN~2021aefx: High-density Burning in a Type Ia Supernova
• Measuring an off-Center Detonation through Infrared Line Profiles: The peculiar Type Ia Supernova SN~2020qxp/ASASSN-20jq
• Spectral signatures of H-rich material stripped from a non-degenerate companion by a Type Ia supernova
• SN2019yvq Does Not Conform to SN Ia Explosion Models
• Nebular spectra from Type Ia supernova explosion models compared to JWST observations of SN 2021aefx
• A Rapid Ionization Change in the Nebular-Phase Spectra of the Type Ia SN 2011fe
• The Whisper of a Whimper of a Bang: 2400 Days of the Type Ia SN 2011fe Reveals the Decay of ${}^{55}$Fe
• Modelling the ionisation state of Type Ia supernovae in the nebular-phase
• SN 2022joj: A Peculiar Type Ia Supernova Possibly Driven by an Asymmetric Helium-shell Double Detonation
• Helium features are inconsistent with the spectral evolution of the kilonova AT2017gfo
• Merging White Dwarf Binaries Produce Type Ia Supernovae in Elliptical Galaxies
• Plasma Instabilities Dominate Radioactive Transients Magnetic Fields: The self-confinement of leptons in Type Ia and Core-Collapse Supernovae, and Kilonovae