SN 2016ije: An SN 2002es-like Type Ia Supernova Exploded in a Metal-poor and Low-surface Brightness Galaxy

Abstract

We have conducted photometric and spectroscopic observations of the peculiar Type Ia supernova (SN Ia) 2016ije that was discovered through the Tsinghua-NAOC Transient Survey. This peculiar object exploded in the outskirts of a metal-poor, low-surface brightness galaxy (i.e., $M_g$ = $-$14.5 mag). Our photometric analysis reveals that SN 2016ije is subluminous ($M_{B,\max }$ = $-$17.65$\pm$0.06 mag) but exhibits relatively broad light curves ($\Delta m_{15}(B)$ = 1.35$\pm$0.14 mag), similar to the behavior of SN 2002es. Our analysis of the bolometric light curve indicates that only 0.14$\pm$0.04 $M_{\odot }$ of ${}^{56}$Ni was synthesized in the explosion of SN 2016ije, which suggests a less energetic thermonuclear explosion when compared to normal SNe Ia, and this left a considerable amount of unburned materials in the ejecta. Spectroscopically, SN 2016ije resembles other SN 2002es-like SNe Ia, except that the ejecta velocity inferred from its carbon absorption line ($\sim$ 4500 km s${}^{-1}$) is much lower than that from silicon lines ($\sim$ 8300 km s${}^{-1}$) at around the maximum light. Additionally, most of the absorption lines are broader than other 02es-like SNe Ia. These peculiarities suggest the presence of significant unburned carbon in the inner region and a wide line-forming region along the line of sight. These characteristics suggest that SN 2016ije might originate from the violent merger of a white dwarf binary system, when viewed near an orientation along the iron-group-element cavity caused by the companion star.

arXiv comment25 pages, 13 figures

References in corpus (52)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• The NumPy array: a structure for efficient numerical computation
• Measuring Reddening with SDSS Stellar Spectra and Recalibrating SFD
• Star Formation in Galaxies Along the Hubble Sequence
• LSST: from Science Drivers to Reference Design and Anticipated Data Products
• Improved cosmological constraints from a joint analysis of the SDSS-II and SNLS supernova samples
• Metallicity Calibrations and the Mass-Metallicity Relation for Star-Forming Galaxies
• Observational clues to the progenitors of Type-Ia supernovae
• Nearby Supernova Rates from the Lick Observatory Supernova Search. II. The Observed Luminosity Functions and Fractions of Supernovae in a Complete Sample
• The Reddening-Free Decline Rate Versus Luminosity Relationship for Type Ia Supernovae
• Cosmic Distances Calibrated to 1% Precision with Gaia EDR3 Parallaxes and Hubble Space Telescope Photometry of 75 Milky Way Cepheids Confirm Tension with LambdaCDM
• The SDSS View of the Palomar-Green Bright Quasar Survey
• The Absolute Luminosities of the Calan/Tololo Type Ia Supernovae
• Normal Type Ia supernovae from violent mergers of white dwarf binaries
• Sub-luminous type Ia supernovae from the mergers of equal-mass white dwarfs with M~0.9 M_sun
• Progenitors of type Ia supernovae
• The diversity of Type Ia Supernovae: evidence for systematics?
• Evidence for a Spectroscopic Sequence Among SNe Ia
• PESSTO : survey description and products from the first data release by the Public ESO Spectroscopic Survey of Transient Objects
• The Hubble Constant: A Summary of the HST Program for the Luminosity Calibration of Type Ia Supernovae by Means of Cepheids
• SALT: a Spectral Adaptive Light curve Template for Type Ia Supernovae
• Improved Distances to Type Ia Supernovae with Two Spectroscopic Subclasses
• Secondary Maximum in the Near-Infrared Lightcurves of Type Ia Supernovae
• The Carnegie Supernova Project: Intrinsic Colors of Type Ia Supernovae
• Optical and Near-Infrared Observations of the Highly Reddened, Rapidly Expanding Type Ia Supernova 2006X in M100
• Firefly (Fitting IteRativEly For Likelihood analYsis): a full spectral fitting code
• The Luminosity of SN 1999by in NGC 2841 and the Nature of `Peculiar' Type Ia Supernovae
• A Golden Standard Type Ia Supernova SN 2005cf: Observations from the Ultraviolet to the Near-Infrared Wavebands
• The Xinglong 2.16-m Telescope: Current Instruments and Scientific Projects
• One-dimensional delayed-detonation models of Type Ia supernovae: Confrontation to observations at bolometric maximum
• Mass-accreting white dwarfs and type Ia supernovae
• ESC observations of SN 2005cf. I. Photometric Evolution of a Normal Type Ia Supernova
• Lijiang 2.4-meter Telescope and its Instruments
• Evidence for sub-Chandrasekhar-mass progenitors of Type Ia supernovae at the faint end of the width-luminosity relation
• The Low-Velocity, Rapidly Fading Type Ia Supernova 2002es
• Slow-Speed Supernovae from the Palomar Transient Factory: Two Channels
• The peculiar Type Ia supernova iPTF14atg: Chandrasekhar-mass explosion or violent merger?
• SN 2010lp---a Type Ia supernova from a violent merger of two carbon--oxygen White Dwarfs
• A Novel Color Parameter As A Luminosity Calibrator for Type Ia Supernovae
• The Photometric System of Tsinghua-NAOC 80-cm Telescope at NAOC Xinglong Observatory
• Type Ia supernovae from violent mergers of carbon-oxygen white dwarfs: polarisation signatures
• [OI] 6300,6364 in the nebular spectrum of a subluminous Type Ia supernova
• Low Surface Brightness Galaxies selected from the 40% sky area of the ALFALFA HI survey.I.Sample and statistical properties
• PTF10ops - a subluminous, normal-width lightcurve Type Ia supernova in the middle of nowhere
• On the Ca-strong 1991bg-like type Ia supernova 2016hnk: evidence for a Chandrasekhar-mass explosion
• The violent white dwarf merger scenario for the progenitors of type Ia supernovae
• A Bright Ultraviolet Excess in the Transitional 02es-like Type Ia Supernova 2019yvq
• SN2002es-like Supernovae From Different Viewing Angles
• Type Ia supernovae have two physical width-luminosity relations and they favor sub-Chandrasekhar and direct collision models - II. Color evolution
• The THU-NAOC Transient Survey: the Performance and the First-year Result
• An asymmetric explosion mechanism may explain the diversity of Si II line widths in Type Ia supernovae

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