SN2019yvq Does Not Conform to SN Ia Explosion Models

Abstract

We present new photometric and spectroscopic observations of SN 2019yvq, a Type Ia supernova (SN Ia) exhibiting several peculiar properties including an excess of UV/optical flux within days of explosion, a high SiII velocity, and a low peak luminosity. Photometry near the time of first light places new constraints on the rapid rise of the UV/optical flux excess. A near-infrared spectrum at $+173$ days after maximum light places strict limits on the presence of H or He emission, effectively excluding the presence of a nearby non-degenerate star at the time of explosion. New optical spectra, acquired at +128 and +150 days after maximum light, confirm the presence of CaII$\lambda 7300$Å and persistent CaII NIR triplet emission as SN 2019yvq transitions into the nebular phase. The lack of [OI]$\lambda 6300$Å emission disfavors the violent merger of two C/O white dwarfs (WDs) but the merger of a C/O WD with a He WD cannot be excluded. We compare our findings with several models in the literature postulated to explain the early flux excess including double-detonation explosions, ${}^{56}$Ni mixing into the outer ejecta during ignition, and interaction with H- and He-deficient circumstellar material. Each model may be able to explain both the early flux excess and the nebular [CaII] emission, but none of the models can reconcile the high photospheric velocities with the low peak luminosity without introducing new discrepancies.

arXiv comment19 pages, 10 figures, and 2 tables. Accepted by ApJ

References in corpus (140)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• The Sloan Digital Sky Survey: Technical Summary
• The Transiting Exoplanet Survey Satellite
• The Zwicky Transient Facility: System Overview, Performance, and First Results
• The Man Behind the Curtain: X-rays Drive the UV through NIR Variability in the 2013 AGN Outburst in NGC 2617
• Cosmic-Ray Rejection by Laplacian Edge Detection
• Nucleosynthesis in Chandrasekhar Mass Models for Type Ia Supernovae and Constraints on Progenitor Systems and Burning-Front Propagation
• A method for optimal image subtraction
• The SBF Survey of Galaxy Distances. IV. SBF Magnitudes, Colors, and Distances
• The All-Sky Automated Survey for Supernovae (ASAS-SN) Light Curve Server v1.0
• Astrometry.net: Blind astrometric calibration of arbitrary astronomical images
• Observational clues to the progenitors of Type-Ia supernovae
• The Pan-STARRS1 Surveys
• The Fourteenth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the extended Baryon Oscillation Spectroscopic Survey and from the second phase of the Apache Point Observatory Galactic Evolution Experiment
• The Pan-STARRS1 Database and Data Products
• Cosmicflows-3
• Explosion Models for Type Ia Supernovae: A Comparison with Observed Light Curves, distances, H_o and q_o
• Normal Type Ia supernovae from violent mergers of white dwarf binaries
• Double-detonation sub-Chandrasekhar supernovae: can minimum helium shell masses detonate the core?
• Seeing the Collision of a Supernova with its Companion Star
• Faint Thermonuclear Supernovae from AM Canum Venaticorum Binaries
• Sub-luminous type Ia supernovae from the mergers of equal-mass white dwarfs with M~0.9 M_sun
• Type Ia Supernova Explosions in Binary Systems: The Impact on the Secondary Star and its Consequences
• Berkeley Supernova Ia Program I: Observations, Data Reduction, and Spectroscopic Sample of 582 Low-Redshift Type Ia Supernovae
• Rates and Delay Times of Type Ia Supernovae
• The Carnegie Supernova Project: Light Curve Fitting with SNooPy
• Accelerating Compact Object Mergers in Triple Systems with the Kozai Resonance: A Mechanism for "Prompt" Type Ia Supernovae, Gamma-Ray Bursts, and Other Exotica
• Comparative Direct Analysis of Type Ia Supernova Spectra. II. Maximum Light
• Double-detonation sub-Chandrasekhar supernovae: synthetic observables for minimum helium shell mass models
• Cosmological parameters from the comparison of peculiar velocities with predictions from the 2M++ density field
• Type Ia Supernova Explosion: Gravitationally Confined Detonation
• Secondary Maximum in the Near-Infrared Lightcurves of Type Ia Supernovae
• Sub-Chandrasekhar-mass white dwarf detonations revisited
• Double-detonation supernovae of sub-Chandrasekhar mass white dwarfs
• The Carnegie Supernova Project: Intrinsic Colors of Type Ia Supernovae
• Type Ia Supernovae Strongly Interacting with Their Circumstellar Medium
• Spectrophotometric time series of SN 2011fe from the Nearby Supernova Factory
• Infrared Spectra of the Subluminous Type Ia Supernova 1999by
• Spectropolarimetry of SN 2001el in NGC 1448: Asphericity of a Normal Type Ia Supernova
• Galaxy Groups within 3500 km s${}^{-1}$
• Violent mergers of nearly equal-mass white dwarf as progenitors of subluminous Type Ia supernovae
• Constraining the Type Ia Supernova Progenitor: The Search for Hydrogen in Nebular Spectra
• The Carnegie Supernova Project I: Third Photometry Data Release of Low-Redshift Type Ia Supernovae and Other White Dwarf Explosions
• Collisions of white dwarfs as a new progenitor channel for type Ia supernovae
• The properties of the peculiar Type Ia SN~1991bg. Analysis and discussion of two years of observations
• Observational Predictions for Sub-Chandrasekhar Mass Explosions: Further Evidence for Multiple Progenitor Systems for Type Ia Supernovae
• How much H and He is "hidden" in SNe Ib/c? I. - low-mass objects
• High-Velocity Features: a ubiquitous property of Type Ia SNe
• EVLA Observations Constrain the Environment and Progenitor System of Type Ia Supernova 2011fe
• A Golden Standard Type Ia Supernova SN 2005cf: Observations from the Ultraviolet to the Near-Infrared Wavebands
• Rapid Eccentricity Oscillations and the Mergers of Compact Objects in Hierarchical Triples
• Early and late time VLT spectroscopy of SN 2001el - progenitor constraints for a type Ia supernova
• The Extremes of Thermonuclear Supernovae
• 2D simulations of the double-detonation model for thermonuclear transients from low-mass carbon-oxygen white dwarfs
• Observational Properties of Thermonuclear Supernovae
• The Mass-Loss Induced Eccentric Kozai Mechanism: A New Channel for the Production of Close Compact Object-Stellar Binaries
• The Initiation and Propagation of Helium Detonations in White Dwarf Envelopes
• Very Early Ultraviolet and Optical Observations of the Type Ia Supernova 2009ig
• Toward ensemble asteroseismology of ZZ Ceti stars with fully evolutionary models
• Type Ia supernova bolometric light curves and ejected mass estimates from the Nearby Supernova Factory
• On Type Ia Supernovae From The Collisions of Two White Dwarfs
• A hybrid type Ia supernova with an early flash triggered by helium-shell detonation
• Evidence for Spectropolarimetric Diversity in Type Ia Supernovae
• No X-rays from the very nearby Type Ia SN2014J: constraints on its environment
• Inverse Compton X-ray Emission from Supernovae with Compact Progenitors: Application to SN2011fe
• Exploring the Potential Diversity of Early Type Ia Supernova Light Curves
• No Stripped Hydrogen in the Nebular Spectra of Nearby Type Ia Supernova 2011fe
• A Deep Search for Prompt Radio Emission from Thermonuclear Supernovae with the Very Large Array
• Constraints on the explosion mechanism and progenitors of type Ia supernovae
• Discovery and Early Evolution of ASASSN-19bt, the First TDE Detected by TESS
• A Search for Radio Emission from Type Ia Supernovae
• ZTF Early Observations of Type Ia Supernovae I: Properties of the 2018 Sample
• Exploring the spectral diversity of low-redshift Type Ia supernovae using the Palomar Transient Factory
• Evidence for sub-Chandrasekhar-mass progenitors of Type Ia supernovae at the faint end of the width-luminosity relation
• Cosmicflows-3: Two Distance$-$Velocity Calculators
• The separation distribution and merger rate of double white dwarfs: improved constraints
• Nebular spectra and abundance tomography of the type Ia supernova SN 2011fe: a normal SN Ia with a stable Fe core
• The Low-Velocity, Rapidly Fading Type Ia Supernova 2002es
• Double Detonations with Thin, Modestly Enriched Helium Layers Can Make Normal Type Ia Supernovae
• Nebular Spectra and Explosion Asymmetry of Type Ia Supernovae
• SN 2006bt: A Perplexing, Troublesome, and Possibly Misleading Type Ia Supernova
• Light and color curve properties of type Ia supernovae: Theory vs. Observations
• Constraints on Shallow 56Ni from the Early Lightcurves of Type Ia Supernovae
• Optical and IR observations of SN 2002dj: some possible common properties of fast expanding SNe Ia
• Type Ia Supernovae with Bi-Modal Explosions Are Common -- Possible Smoking Gun for Direct Collisions of White-Dwarfs
• Greatly Enhanced Eccentricity Oscillations in Quadruple Systems Composed of Two Binaries: Implications for Stars, Planets, and Transients
• Circumstellar absorption in double detonation Type Ia supernovae
• Spectropolarimetry of the Type II Supernovae 1997ds, 1998A, and 1999gi
• The peculiar velocity field up to $z\sim 0.05$ by forward-modeling Cosmicflows-3 data
• Pre-Maximum Spectropolarimetry of the Type Ia SN 2004dt
• Searching for swept-up Hydrogen and Helium in the late-time spectra of 11 nearby Type Ia supernovae
• The rate of WD-WD head-on collisions in isolated triples is too low to explain standard type Ia supernovae
• The peculiar Type Ia supernova iPTF14atg: Chandrasekhar-mass explosion or violent merger?
• Two transitional type~Ia supernovae located in the Fornax cluster member NGC 1404: SN 2007on and SN 2011iv
• Constraining Type Ia Supernovae progenitors from three years of SNLS data
• SN 2010lp---a Type Ia supernova from a violent merger of two carbon--oxygen White Dwarfs
• Linear spectropolarimetry of 35 Type Ia Supernovae with VLT/FORS: An analysis of the Si II line polarization
• Dynamical formation & scattering of hierarchical triples: Cross sections, Kozai-Lidov oscillations, and collisions
• SNe Ia from double detonations: Impact of core-shell mixing on the carbon ignition mechanism
• Multidimensional Models of Type Ia Supernova Nebular Spectra: Strong Emission Lines from Stripped Companion Gas Rule Out Classic Single Degenerate Systems
• [OI] 6300,6364 in the nebular spectrum of a subluminous Type Ia supernova
• Nebular Spectra of 111 Type Ia Supernovae Disfavor Single Degenerate Progenitors
• Surface Radioactivity or Interactions? Multiple Origins of Early-excess Type Ia Supernovae and Associated Subclasses
• ASASSN-18tb: A Most Unusual Type Ia Supernova Observed by TESS and SALT
• Red vs Blue: Early observations of thermonuclear supernovae reveal two distinct populations?
• Where are the double-degenerate progenitors of type Ia supernovae?
• Dynamics of Quadruple Systems Composed of Two Binaries: Stars, White Dwarfs, and Implications for Ia Supernovae
• Early Time Light Curves of Type Ia Supernovae Observed with TESS
• Nebular Models of Sub-Chandrasekhar Mass Type Ia Supernovae: Clues to the Origin of Ca-rich Transients
• Signatures of A Companion Star in Type Ia Supernovae
• The Spectacular Ultraviolet Flash From the Peculiar Type Ia Supernova 2019yvq
• Investigating the Diversity of Type Ia Supernova Spectra with the Open-Source Relational Database Kaepora
• Strong Calcium Emission Indicates that the Ultraviolet-Flashing Type Ia SN 2019yvq was the Result of a Sub-Chandrasekhar Mass Double-Detonation Explosion
• On the Ca-strong 1991bg-like type Ia supernova 2016hnk: evidence for a Chandrasekhar-mass explosion
• Imprints of the ejecta-companion interaction in Type Ia supernovae: main sequence, subgiant, and red giant companions
• An investigation of ${}^{56}$Ni shells as the source of early light curve bumps in type Ia supernovae
• One-dimensional non-LTE time-dependent radiative transfer of an He-detonation model and the connection to faint and fast-decaying supernovae
• Predicting polarization signatures for double-detonation and delayed-detonation models of Type Ia supernovae
• Comparative Direct Analysis of Type Ia Supernova Spectra. IV. Postmaximum
• Late-time near-infrared observations of SN 2005df
• How do Type Ia Supernova Nebular Spectra Depend on Explosion Properties? Insights from Systematic non-LTE Modeling
• ZTF Early Observations of Type Ia Supernovae III: Early-Time Colors as a Test for Explosion Models and Multiple Populations
• Helium in Double-Detonation Models of Type Ia Supernovae
• The violent white dwarf merger scenario for the progenitors of type Ia supernovae
• On the rates of type Ia supernovae originating from white dwarf collisions in quadruple star systems
• Carnegie Supernova Project-II: A new method to photometrically identify sub-types of extreme Type Ia Supernovae
• Near-infrared spectral evolution of the Type Ia supernova 2014J in the nebular phase: implications for the progenitor system
• Defining Photometric Peculiar Type Ia Supernovae
• Progressive Red Shifts in the Late-Time Spectra of Type Ia Supernovae
• Radioactively-Powered Rising Lightcurves of Type Ia Supernovae
• The nebular spectra of the transitional Type Ia Supernovae 2007on and 2011iv: broad, multiple components indicate aspherical explosion cores
• Light Curves and Spectra from a Thermonuclear Explosion of a White Dwarf Merger
• Understanding nebular spectra of Type Ia supernovae
• Spectral signatures of H-rich material stripped from a non-degenerate companion by a Type Ia supernova
• Identification of the feature that causes the I-band secondary maximum of a type Ia supernova
• Nebular H$\alpha$ Limits for Fast Declining Type Ia Supernovae
• Post-maximum near infrared spectra of SN 2014J: A search for interaction signatures
• Signatures of Bimodality in Nebular Phase Type Ia Supernova Spectra
• The HI content of the advanced merger NGC 4441

Cited by in corpus (12)

• A Bright Ultraviolet Excess in the Transitional 02es-like Type Ia Supernova 2019yvq
• Constraining the Progenitor System of the Type Ia Supernova 2021aefx
• A Speed Bump: SN 2021aefx Shows that Doppler Shift Alone can Explain Early-Excess Blue Flux in Some Type Ia Supernovae
• SN 2021zny: an early flux excess combined with late-time oxygen emission suggests a double white dwarf merger event
• From Out of the Blue: Swift Links 2002es-like, 2003fg-like, and Early-Time Bump Type Ia Supernovae
• The origin and evolution of the normal Type Ia SN 2018aoz with infant-phase reddening and excess emission
• A Rapid Ionization Change in the Nebular-Phase Spectra of the Type Ia SN 2011fe
• SN 2016dsg: A Thermonuclear Explosion Involving A Thick Helium Shell
• The Early Light Curve of SN 2023bee: Constraining Type Ia Supernova Progenitors the Apian Way
• Early excess emission in Type Ia supernovae from the interaction between supernova ejecta and their circumstellar wind
• The New Status Qvo? SN 2021qvo is Another 2003fg-like Type Ia Supernova with a Rising Light-Curve Bump
• Circumstellar Medium Constraints on the Environment of Two Nearby Type Ia Supernovae: SN 2017cbv and SN 2020nlb