SN 2020ank: a bright and fast-evolving H-deficient superluminous supernova

Abstract

We investigate the observational properties of a hydrogen-deficient superluminous supernova (SLSN) SN 2020ank (at z = 0.2485), with the help of early phase observations carried out between $-$21 and +52 d since $g$-band maximum. Photometrically, SN 2020ank is one of the brightest SLSN ($M_{g,peak}$ $\sim$ $-$21.84 $\pm$ 0.10 mag), having fast pre-peak rising and post-peak decaying rates. The bolometric light curve of SN 2020ank exhibits a higher peak luminosity ($L_{max}$) of $\sim$(3.9 $\pm$ 0.7) $\times$ 10${}^{44}$ erg s${}^{-1}$ and appears to be symmetric around the peak with $L_{max}^{rise}$/e $\approx$ $L_{max}^{fall}$/e $\approx$ 15 d. The semi-analytical light-curve modelling using the MINIM code suggests a spin down millisecond magnetar with $P_i$ $\sim$2.2 $\pm$ 0.5 ms and $B$ $\sim$(2.9 $\pm$ 0.1) $\times$ $10^{14}$ G as a possible powering source for SN 2020ank. The possible magnetar origin and excess ultraviolet flux at early epochs indicate a central-engine based powering source for SN 2020ank. Near-peak spectra of SN 2020ank are enriched with the W-shaped O II features but with the weaker signatures of C II and Fe III. Using the estimated rise time of $\sim$27.9 d and the photospheric velocity of $\sim$12050 km s${}^{-1}$, we constrain the ejecta mass to $\sim$7.2 $M_{\odot }$ and the kinetic energy of $\sim$6.3 $\times$ 10${}^{51}$ erg. The near-peak spectrum of SN 2020ank exhibits a close spectral resemblance with that of fast-evolving SN 2010gx. The absorption features of SN 2020ank are blueshifted compared to Gaia16apd, suggesting a higher expansion velocity. The spectral similarity with SN 2010gx and comparatively faster spectral evolution than PTF12dam (a slow-evolving SLSN) indicate the fast-evolving behavior of SN 2020ank.

arXiv comment17 pages, 13 figures, Accepted in MNRAS, Accepted 2020 December 29. Received in original form 2020 October 06

References in corpus (91)

• Measuring Reddening with SDSS Stellar Spectra and Recalibrating SFD
• Collapsars - Gamma-Ray Bursts and Explosions in "Failed Supernovae"
• The Zwicky Transient Facility: System Overview, Performance, and First Results
• Explosion Mechanisms of Core-Collapse Supernovae
• Supernova Light Curves Powered by Young Magnetars
• Luminous Supernovae
• Empirical Color Transformations Between SDSS Photometry and Other Photometric Systems
• Hydrogen-poor superluminous stellar explosions
• Nucleosynthesis of Zinc and Iron-Peak Elements in Pop III Type II Supernovae : Comparison with abundances of Very Metal-Poor Halo Stars
• Bright Supernovae from Magnetar Birth
• Supernova 2007bi as a pair-instability explosion
• An Empirical Relation between Sodium Absorption and Dust Extinction
• Super Luminous Ic Supernovae: catching a magnetar by the tail
• Generalized Semi-Analytical Models of Supernova Light Curves
• A very luminous magnetar-powered supernova associated with an ultra-long gamma-ray burst
• Slowly fading super-luminous supernovae that are not pair-instability explosions
• The magnetar model for Type I superluminous supernovae I: Bayesian analysis of the full multicolour light curve sample with MOSFiT
• The Diversity of Transients from Magnetar Birth
• SN 2005ap: A Most Brilliant Explosion
• Analytical Light Curve Models of Super-Luminous Supernovae: chi^2-Minimizations of Parameter Fits
• Pair Instability Supernovae: Light Curves, Spectra, and Shock Breakout
• Hydrogen-Poor Superluminous Supernovae and Long-Duration Gamma-Ray Bursts Have Similar Host Galaxies
• The Most Luminous Supernovae
• Ultra-bright optical transients are linked with type Ic supernovae
• Spectroscopy of superluminous supernova host galaxies. A preference of hydrogen-poor events for extreme emission line galaxies
• Super-luminous supernovae: 56Ni power versus magnetar radiation
• Host-Galaxy Properties of 32 Low-Redshift Superluminous Supernovae from the Palomar Transient Factory
• ASASSN-15lh: A Highly Super-Luminous Supernova
• On the diversity of super-luminous supernovae: ejected mass as the dominant factor
• The Carnegie Supernova Project I: analysis of stripped-envelope supernova light curves
• Rates of Superluminous Supernovae at z~0.2
• How much 56Ni can be produced in Core-Collapse Supernovae? : Evolution and Explosions of 30 - 100 Msun Stars
• An Updated Ultraviolet Calibration for the Swift/UVOT
• Cosmic evolution and metal aversion in super-luminous supernova host galaxies
• The Exceptionally Luminous Type II-L SN 2008es
• SN 2006oz: rise of a super-luminous supernova observed by the SDSS-II SN Survey
• Rapidly evolving transients in the Dark Energy Survey
• SN 2015bn: a detailed multi-wavelength view of a nearby superluminous supernova
• Direct Analysis of Spectra of Type Ib Supernovae
• Super-luminous supernovae from PESSTO
• Superluminous supernovae
• Spectrum formation in Superluminous Supernovae (Type I)
• Light curves of hydrogen-poor Superluminous Supernovae from the Palomar Transient Factory
• Discovery of the Ultra-Bright Type II-L Supernova 2008es
• Spectra of Hydrogen-Poor Superluminous Supernovae from the Palomar Transient Factory
• Detection of Broad H$\alpha$ Emission Lines in the Late-time Spectra of a Hydrogen-poor Superluminous Supernova
• Superluminous Light Curves from Supernovae Exploding in a Dense Wind
• Analysis of Late--time Light Curves of Type IIb, Ib and Ic Supernovae
• The host galaxy and late-time evolution of the Super-Luminous Supernova PTF12dam
• LSQ14bdq: A Type Ic super-luminous supernova with a double-peaked light curve
• Hydrogen-poor Superluminous Supernovae With Late-time H-alpha Emission: Three Events From the Intermediate Palomar Transient Factory
• The hydrogen-poor superluminous supernova iPTF13ajg and its host galaxy in absorption and emission
• On the nature of Hydrogen-rich Superluminous Supernovae
• Superluminous Supernovae from the Dark Energy Survey
• The Volumetric Rate of Superluminous Supernovae at z~1
• Superluminous supernova progenitors have a half-solar metallicity threshold
• DES14X3taz: A Type I Superluminous Supernova Showing a Luminous, Rapidly Cooling Initial Pre-Peak Bump
• Complexity in the light curves and spectra of slow-evolving superluminous supernovae
• Ion Signatures in Supernova Spectra
• Observational properties of extreme supernovae
• Analyzing the Largest Spectroscopic Dataset of Hydrogen-Poor Super-Luminous Supernovae
• SN2008am: A Super-Luminous Type IIn Supernova
• Selecting superluminous supernovae in faint galaxies from the first year of the Pan-STARRS1 Medium Deep Survey
• Gaia17biu/SN 2017egm in NGC 3191: The closest hydrogen-poor superluminous supernova to date is in a "normal", massive, metal-rich spiral galaxy
• Far-Ultraviolet to Near-Infrared Spectroscopy of A Nearby Hydrogen Poor Superluminous Supernova Gaia16apd
• An ultraviolet excess in the superluminous supernova Gaia16apd reveals a powerful central engine
• On the early-time excess emission in hydrogen-poor superluminous supernovae
• PS1-10afx at z=1.388: Pan-STARRS1 Discovery of a New Type of Superluminous Supernova
• Nebular-phase spectra of superluminous supernovae: physical insights from observational and statistical properties
• Magnetar-powered superluminous supernovae must first be exploded by jets
• The Unusual Super-Luminous Supernovae SN 2011kl and ASASSN-15lh
• The evolution of superluminous supernova LSQ14mo and its interacting host galaxy system
• Simulations of light curves and spectra for superluminous Type Ic supernovae powered by magnetars
• Highly Luminous Supernovae associated with Gamma-Ray Bursts I.: GRB 111209A/SN 2011kl in the Context of Stripped-Envelope and Superluminous Supernovae
• Gaia16apd -- a link between fast-and slowly-declining type I superluminous supernovae
• Can pair-instability supernova models match the observations of superluminous supernovae?
• A Monte Carlo Approach to Magnetar-powered Transients: I. Hydrogen-deficient Superluminous Supernovae
• A statistical approach to identify superluminous supernovae and probe their diversity
• A simple analysis of Type I superluminous supernova peak spectra: composition, expansion velocities, and dynamics
• Jets launched at magnetar birth cannot be ignored
• FLEET: A Redshift-Agnostic Machine Learning Pipeline to Rapidly Identify Hydrogen-Poor Superluminous Supernovae
• Circumstellar Interaction Models for the Bolometric Light Curve of SN 2017egm
• Euclid: Superluminous supernovae in the Deep Survey
• The Type I Superluminous Supernova PS16aqv: Lightcurve Complexity and Deep Limits on Radioactive Ejecta in a Fast Event
• The Energy Sources of Superluminous Supernovae
• Average opacity calculation for core-collapse supernovae
• ASASSN-16fp (SN 2016coi): A transitional supernova between Type Ic and broad-lined Ic
• SN 2010kd: Photometric and Spectroscopic Analysis of a Slow-Decaying Superluminous Supernova
• A Systematic Study Of Superluminous Supernova Lightcurve Models Using Clustering
• Comparative Spectral Analysis of the Superluminous Supernova 2019neq
• GRB 111209A/SN 2011kl: Collapse of a supramassive magnetar with r-mode oscillation and fall-back accretion onto a newborn black hole

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