SN 2019muj -- a well-observed Type Iax supernova that bridges the luminosity gap of the class

Abstract

We present early-time ($t<+50$ days) observations of SN 2019muj (= ASASSN-19tr), one of the best-observed members of the peculiar SN Iax class. Ultraviolet and optical photometric and optical and near-infrared spectroscopic follow-up started from $\sim$5 days before maximum light ($t_{max}(B)$ on $58707.8$ MJD) and covers the photospheric phase. The early observations allow us to estimate the physical properties of the ejecta and characterize the possible divergence from a uniform chemical abundance structure. The estimated bolometric light curve peaks at 1.05 $\times$ 10${}^{42}$ erg s${}^{-1}$ and indicates that only 0.031 $M_{\odot }$ of ${}^{56}$Ni was produced, making SN 2019muj a moderate luminosity object in the Iax class with peak absolute magnitude of $M_V$ = -16.4 mag. The estimated date of explosion is $t_0=58698.2$ MJD and implies a short rise time of $t_{rise}$ = 9.6 days in $B$-band. We fit of the spectroscopic data by synthetic spectra, calculated via the radiative transfer code TARDIS. Adopting the partially stratified abundance template based on brighter SNe Iax provides a good match with SN 2019muj. However, without earlier spectra, the need for stratification cannot be stated in most of the elements, except carbon, which is allowed to appear in the outer layers only. SN 2019muj provides a unique opportunity to link extremely low-luminosity SNe Iax to well-studied, brighter SNe Iax.

arXiv comment24 pages, 17 figures, accepted for publication in MNRAS

References in corpus (83)

• Measuring Reddening with SDSS Stellar Spectra and Recalibrating SFD
• The Swift X-ray Telescope
• The Swift Ultra-Violet/Optical Telescope
• The Man Behind the Curtain: X-rays Drive the UV through NIR Variability in the 2013 AGN Outburst in NGC 2617
• K-corrections and filter transformations in the ultraviolet, optical, and near infrared
• ATLAS: A High-Cadence All-Sky Survey System
• Las Cumbres Observatory Global Telescope Network
• A Method of Correcting Near-Infrared Spectra for Telluric Absorption
• The Pan-STARRS1 Photometric System
• Nearby Supernova Rates from the Lick Observatory Supernova Search. II. The Observed Luminosity Functions and Fractions of Supernovae in a Complete Sample
• An Analysis of the Shapes of Interstellar Extinction Curves. V. The IR-Through-UV Curve Morphology
• Cosmicflows-2: The Data
• The SDSS View of the Palomar-Green Bright Quasar Survey
• The Pan-STARRS1 Database and Data Products
• Cosmicflows-3
• Supernova 2011fe from an Exploding Carbon-Oxygen White Dwarf Star
• Type Iax Supernovae: A New Class of Stellar Explosion
• The diversity of Type II supernova versus the similarity in their progenitors
• SN 2002cx: The Most Peculiar Known Type Ia Supernova
• PESSTO : survey description and products from the first data release by the Public ESO Spectroscopic Survey of Transient Objects
• Generalized Semi-Analytical Models of Supernova Light Curves
• Comparative Direct Analysis of Type Ia Supernova Spectra. II. Maximum Light
• Three-dimensional pure deflagration models with nucleosynthesis and synthetic observables for Type Ia supernovae
• Type Ia Supernova Explosion: Gravitationally Confined Detonation
• Secondary Maximum in the Near-Infrared Lightcurves of Type Ia Supernovae
• SOUSA: the Swift Optical/Ultraviolet Supernova Archive
• The Broad-lined Type Ic SN 2003jd
• Gemini Spectroscopy of Supernovae from SNLS: Improving High Redshift SN Selection and Classification
• The Peculiar SN 2005hk: Do Some Type Ia Supernovae Explode as Deflagrations?
• 3D deflagration simulations leaving bound remnants: a model for 2002cx-like Type Ia supernovae
• SN 2008ha: An Extremely Low Luminosity and Extremely Low Energy Supernova
• Testing LMC Microlensing Scenarios: The Discrimination Power of the SuperMACHO Microlensing Survey
• Abundance stratification in Type Ia supernovae - I. The case of SN 2002bo
• The Carnegie Supernova Project I: Third Photometry Data Release of Low-Redshift Type Ia Supernovae and Other White Dwarf Explosions
• The first month of evolution of the slow rising type II-P SN 2013ej in M74
• A low energy core-collapse supernova without a hydrogen envelope
• A spectral synthesis code for rapid modelling of supernovae
• Failed-Detonation Supernovae: Sub-Luminous Low-Velocity Ia Supernovae and Their Kicked Remnant White Dwarfs with Iron-Rich Cores
• Late-Time Spectroscopy of SN 2002cx: The Prototype of a New Subclass of Type Ia Supernovae
• A luminous, blue progenitor system for a type-Iax supernova
• The Extremes of Thermonuclear Supernovae
• A Preliminary Indication of Evolution of Type Ia Supernovae from their Risetimes
• The Rise-Time Distribution of Nearby Type Ia Supernovae
• Three-Dimensional Simulations of the Deflagration Phase of the Gravitationally Confined Detonation Model of Type Ia Supernovae
• Supercal: Cross-Calibration of Multiple Photometric Systems to Improve Cosmological Measurements with Type Ia Supernovae
• LOSS Revisited - II: The relative rates of different types of supernovae vary between low- and high-mass galaxies
• Deflagrations in hybrid CONe white dwarfs: a route to explain the faint Type Iax supernova 2008ha
• The Rising Light Curves of Type Ia Supernovae
• The Absolute Magnitudes of Type Ia Supernovae in the Ultraviolet
• Comprehensive Observations of the Bright and Energetic Type Iax SN 2012Z: Interpretation as a Chandrasekhar Mass White Dwarf Explosion
• The Low-Velocity, Rapidly Fading Type Ia Supernova 2002es
• Berkeley Supernova Ia Program II: Initial Analysis of Spectra Obtained Near Maximum Brightness
• Light and color curve properties of type Ia supernovae: Theory vs. Observations
• Spectroscopic Observations of SN 2012fr: A Luminous Normal Type Ia Supernova with Early High Velocity Features and Late Velocity Plateau
• Slow-Speed Supernovae from the Palomar Transient Factory: Two Channels
• Optical and Near-IR Observations of the Faint and Fast 2008ha-like Supernova 2010ae
• Possible Detection of the Stellar Donor or Remnant for the Type Iax Supernova 2008ha
• The type Iax supernova, SN 2015H: a white dwarf deflagration candidate
• Type Iax Supernovae
• Early and Late-Time Observations of SN 2008ha: Additional Constraints for the Progenitor and Explosion
• Connecting the progenitors, pre-explosion variability, and giant outbursts of luminous blue variables with Gaia16cfr
• The Subluminous Supernova 2007qd: A Missing Link in a Family of Low-Luminosity Type Ia Supernovae
• Beyond the bubble catastrophe of Type Ia supernovae: Pulsating Reverse Detonation models
• Hybrid C-O-Ne white dwarfs as progenitors of type Ia supernovae: dependence on Urca process and mixing assumptions
• Displaying the Heterogeneity of the SN 2002cx-like Subclass of Type Ia Supernovae with Observations of the Pan-STARRS-1 Discovered SN2009ku
• The Detonation Mechanism of the Pulsationally-Assisted Gravitationally-Confined Detonation Model of Type Ia Supernovae
• Nebular Spectroscopy of the `Blue Bump' Type Ia Supernova 2017cbv
• Investigating the diversity of supernovae type Iax: A MUSE and NOT spectroscopic study of their environments
• On the Progenitor and Supernova of the SN 2002cx-like Supernova 2008ge
• Pulsating reverse detonation models of Type Ia supernovae. II: Explosion
• Optical and near infrared observations of SN 2014ck: an outlier among the Type Iax supernovae
• Interpreting Flux from Broadband Photometry
• Explosion of white dwarfs harboring hybrid CONe cores
• Abundance Tomography of Type Iax SN 2011ay with TARDIS
• The lowest of the low: discovery of SN 2019gsc and the nature of faint Iax supernovae
• Color Me Intrigued: the Discovery of iPTF 16fnm, a Supernova 2002cx-like Object
• The early phases of the type Iax supernova SN 2011ay
• Type Iax SNe as a few-parameter family
• Detection of Circumstellar Helium in Type Iax Progenitor Systems
• Detecting the signatures of helium in type Iax supernovae
• Potential Vorticity Mixing in a Tangled Magnetic Field
• Observations of the low-luminosity Type Iax supernova 2019gsc: a fainter clone of SN 2008ha?
• Constraining Type Iax Supernova Progenitor Systems with Stellar Population Aging

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