An Intermediate Type Ia Supernova Between Normal And Super-Chandrasekhar

Abstract

In this paper, we report observations of a peculiar Type Ia supernova iPTF13asv (a.k.a., SN2013cv) from the onset of the explosion to months after its peak. The early-phase spectra of iPTF13asv show absence of iron absorption, indicating that synthesized iron elements are confined to low-velocity regions of the ejecta, which, in turn, implies a stratified ejecta structure along the line of sight. Our analysis of iPTF13asv's light curves and spectra shows that it is an intermediate case between normal and super-Chandrasekhar events. On the one hand, its light curve shape (B-band $\Delta m_{15}=1.03\pm 0.01$) and overall spectral features resemble those of normal Type Ia supernovae. On the other hand, similar to super-Chandrasekhar events, it shows large peak optical and UV luminosity ($M_B=-19.84\mathrm{mag}$, $M_{uvm2}=-15.5\mathrm{mag}$) a relatively low but almost constant \ion{Si}{2} velocities of about $10,000\mathrm{km}{\mathrm{s}}^{-1}$, and persistent carbon absorption in the spectra. We estimate a ${}^{56}$Ni mass of $0.81_{-0.18}^{+0.10}{M}_{\odot }$ and a total ejecta mass of $1.59_{-0.12}^{+0.45}{M}_{\odot }$. The large ejecta mass of iPTF13asv and its stratified ejecta structure together seemingly favor a double-degenerate origin.

13 pages, 16 figures, ApJ in press

References in corpus (84)

• Measuring Reddening with SDSS Stellar Spectra and Recalibrating SFD
• Planck 2013 results. XVI. Cosmological parameters
• Improved cosmological constraints from a joint analysis of the SDSS-II and SNLS supernova samples
• New Hubble Space Telescope Discoveries of Type Ia Supernovae at z > 1: Narrowing Constraints on the Early Behavior of Dark Energy
• The Palomar Transient Factory: System Overview, Performance and First Results
• An ultra-deep near-infrared spectrum of a compact quiescent galaxy at z=2.2
• Observational clues to the progenitors of Type-Ia supernovae
• SALT2: using distant supernovae to improve the use of Type Ia supernovae as distance indicators
• WISeREP - An Interactive Supernova Data Repository
• Exploring the Optical Transient Sky with the Palomar Transient Factory
• The type Ia supernova SNLS-03D3bb from a super-Chandrasekhar-mass white dwarf star
• Determining the Type, Redshift, and Age of a Supernova Spectrum
• Supernova 2011fe from an Exploding Carbon-Oxygen White Dwarf Star
• An Empirical Relation between Sodium Absorption and Dust Extinction
• SNLS3: Constraints on Dark Energy Combining the Supernova Legacy Survey Three Year Data with Other Probes
• New light on the search for low metallicity galaxies I. The N2 method
• Seeing the Collision of a Supernova with its Companion Star
• Detection of circumstellar material in a normal Type Ia Supernova
• Nearby Supernova Factory Observations of SN 2007if: First Total Mass Measurement of a Super-Chandrasekhar-Mass Progenitor
• K-corrections and spectral templates of Type Ia supernovae
• Constraints on the Progenitor System of the Type Ia Supernova SN 2011fe/PTF11kly
• K-corrections and Extinction Corrections for Type Ia Supernovae
• Velocity Dispersion Profiles of Seven Dwarf Spheroidal Galaxies
• Double-detonation sub-Chandrasekhar supernovae: synthetic observables for minimum helium shell mass models
• Head-on collisions of white dwarfs in triple systems could explain type Ia supernova
• The Spectroscopic Diversity of Type Ia Supernovae
• Secondary Maximum in the Near-Infrared Lightcurves of Type Ia Supernovae
• The Luminous and Carbon-Rich Supernova 2006gz: A Double Degenerate Merger?
• Nearby Supernova Factory Observations of SN 2005gj: Another Type Ia Supernova in a Massive Circumstellar Envelope
• The Automated Palomar 60-Inch Telescope
• The Carnegie Supernova Project: Intrinsic Colors of Type Ia Supernovae
• Spectrophotometric time series of SN 2011fe from the Nearby Supernova Factory
• CfA4: Light Curves for 94 Type Ia Supernovae
• On the evolution of rapidly rotating massive white dwarfs towards supernovae or collapses
• Gemini Spectroscopy of Supernovae from SNLS: Improving High Redshift SN Selection and Classification
• Fourteen Months of Observations of the Possible Super-Chandrasekhar Mass Type Ia Supernova 2009dc
• High luminosity, slow ejecta and persistent carbon lines: SN 2009dc challenges thermonuclear explosion scenarios
• Strong Ultraviolet Pulse From a Newborn Type Ia Supernova
• Hubble Space Telescope spectra of the type Ia supernova SN2011fe: a tail of low-density, high-velocity material with Z<Zsolar
• A luminous, blue progenitor system for a type-Iax supernova
• Early phase observations of extremely luminous Type Ia Supernova 2009dc
• Single-degenerate type Ia supernovae without hydrogen contamination
• SN~2012cg: Evidence for Interaction Between a Normal Type Ia Supernova and a Non-Degenerate Binary Companion
• Optical Spectroscopy of Type Ia Supernovae
• Presupernova evolution of accreting white dwarfs with rotation
• Spin-Up/Spin-Down models for Type Ia Supernovae
• Type Ia supernova bolometric light curves and ejected mass estimates from the Nearby Supernova Factory
• The Rising Light Curves of Type Ia Supernovae
• A Swift Look at SN 2011fe: The Earliest Ultraviolet Observations of a Type Ia Supernova
• The Host Galaxies of Type Ia Supernovae Discovered by the Palomar Transient Factory
• The ejected mass distribution of type Ia supernovae: A significant rate of non-Chandrasekhar-mass progenitors
• A Study of Carbon Features in Type Ia Supernova Spectra
• Off-Center Carbon Ignition in Rapidly Rotating, Accreting Carbon-Oxygen White Dwarfs
• No X-rays from the very nearby Type Ia SN2014J: constraints on its environment
• No Stripped Hydrogen in the Nebular Spectra of Nearby Type Ia Supernova 2011fe
• Spectroscopic Observations and Analysis of the Peculiar SN 1999aa
• Synthetic light curves and spectra for three-dimensional delayed-detonation models of Type Ia supernovae
• Velocity Evolution and the Intrinsic Color of Type Ia Supernovae
• Type Ia Supernovae from Merging White Dwarfs I. Prompt Detonations
• Type Ia Supernova Carbon Footprints
• Constraints on the Progenitor System of the Type Ia Supernova 2014J from Pre-Explosion Hubble Space Telescope Imaging
• The colour-lightcurve shape relation of Type Ia supernovae and the reddening law
• The Earliest Near-infrared Time-series Spectroscopy of a Type Ia Supernova
• Carbon Detection in Early-Time Optical Spectra of Type Ia Supernovae
• Possible Detection of the Stellar Donor or Remnant for the Type Iax Supernova 2008ha
• Near-infrared observations of type Ia supernovae: The best known standard candle for cosmology
• A Search for New Candidate Super-Chandrasekhar-Mass Type Ia Supernovae in the Nearby Supernova Factory Dataset
• No trace of a single-degenerate companion in late spectra of SNe 2011fe and 2014J
• The Exceptionally Luminous Type Ia Supernova 2007if
• Identification of Type Ia Supernovae at Redshift 1.3 and Beyond with the Advanced Camera for Surveys on HST
• Constraints on the origin of the first light from SN2014J
• Grouping Normal Type Ia Supernovae by UV to Optical Color Differences
• Final Fates of Rotating White Dwarfs and Their Companions in the Single Degenerate Model of Type Ia Supernovae
• The Internal Shear of Type Ia Supernova Progenitors During Accretion and Simmering
• Galaxy And Mass Assembly (GAMA): The mass-metallicity relationship
• Testing SNe Ia distance measurement methods with SN 2011fe
• Multi-Epoch High-Spectral-Resolution Observations of Neutral Sodium in 14 Type Ia Supernovae
• Ultraviolet Observations of Super-Chandrasekhar Mass Type Ia Supernova Candidates with Swift UVOT
• The explosion of supernova 2011fe in the frame of the core-degenerate scenario
• Radioactively-Powered Rising Lightcurves of Type Ia Supernovae
• Observational Characteristics and Possible Asphericity of Over-Luminous Type Ia Supernovae
• Early ultraviolet emission in the Type Ia supernova LSQ12gdj: No evidence for ongoing shock interaction
• SDSS-II Supernova Survey: An Analysis of the Largest Sample of Type Ia Supernovae and Correlations with Host-Galaxy Spectral Properties
• The Ultraviolet Brightest Type Ia Supernova 2011de

Cited by in corpus (13)

• Photometric and Spectroscopic Properties of Type Ia Supernova 2018oh with Early Excess Emission from the $Kepler$ 2 Observations
• Surface Radioactivity or Interactions? Multiple Origins of Early-excess Type Ia Supernovae and Associated Subclasses
• Determining the ${}^{56}$Ni distribution of type Ia supernovae from observations within days of explosion
• Delayed Circumstellar Interaction for Type Ia SN 2015cp Revealed by an HST Ultraviolet Imaging Survey
• Near-IR Type Ia SN distances: host galaxy extinction and mass-step corrections revisited
• Gravitational wave in f(R) gravity: possible signature of sub- and super-Chandrasekhar limiting mass white dwarfs
• Anisotropic magnetized white dwarfs: Unifying under- and over-luminous peculiar and standard type Ia supernovae
• Spectral sequences of Type Ia supernovae. I. Connecting normal and sub-luminous SN Ia and the presence of unburned carbon
• Spectral sequences of Type Ia supernovae. II. Carbon as a diagnostic tool for explosion mechanisms
• Understanding Type Ia supernovae through their U-band spectra
• Resolving dichotomy in compact objects through continuous gravitational waves observation
• The New Status Qvo? SN 2021qvo is Another 2003fg-like Type Ia Supernova with a Rising Light-Curve Bump
• Massive Neutron Stars and White Dwarfs as Noncommutative Fuzzy Spheres