The bright long-lived Type II SN 2021irp powered by aspherical circumstellar material interaction (I): Revealing the energy source with photometry and spectroscopy

Abstract

Some core-collapse supernovae (CCSNe) are too luminous and radiate too much total energy to be powered by the release of thermal energy from the ejecta and radioactive-decay energy from the synthesised ${}^{56}$Ni/${}^{56}$Co. A source of additional power is the interaction between the supernova (SN) ejecta and a massive circumstellar material (CSM). This is an important power source in Type IIn SNe, which show narrow spectral lines arising from the unshocked CSM, but not all interacting SNe show such narrow lines. We present photometric and spectroscopic observations of the hydrogen-rich SN 2021irp, which is both luminous, with $M_o<-19.4$ mag, and long-lived, remaining brighter than $M_o=-18$ mag for $\sim$ 250 d. We show that an additional energy source is required to power such a SN, and determine the nature of the source. We also investigate the properties of the pre-existing and newly formed dust associated with the SN. Photometric observations show that the luminosity of the SN is an order of magnitude higher than typical Type II SNe and persists for much longer. We detect a infrared excess attributed to dust emission. Spectra show multi-component line profiles, an Fe II pseudo-continuum, and a lack of absorption lines, all typical features of Type IIn SNe. We detect a narrow (< 85 kms${}^{-1}$) P-Cygni profile associated with the unshocked CSM. An asymmetry in emission line profiles indicates dust formation occurring from 250-300 d. Analysis of the SN blackbody radius evolution indicates asymmetry in the shape of the emitting region. We identify the main power source of SN 2021irp as extensive interaction with a massive CSM, and that this CSM is distributed asymmetrically around the progenitor star. The infrared excess is explained with emission from newly formed dust although there is also some evidence of an IR echo from pre-existing dust at early times.

23 pages, 16 figures, submitted to A&A

References in corpus (110)

• Astropy: A Community Python Package for Astronomy
• emcee: The MCMC Hammer
• Stellar population synthesis at the resolution of 2003
• Measuring Reddening with SDSS Stellar Spectra and Recalibrating SFD
• On the variation of the Initial Mass Function
• The Dust Content and Opacity of Actively Star-Forming Galaxies
• The Astropy Project: Sustaining and Growing a Community-oriented Open-source Project and the Latest Major Release (v5.0) of the Core Package
• Binary companions of evolved stars in APOGEE DR14: Search method and catalog of ~5,000 companions
• Correcting for the Effects of Interstellar Extinction
• Cosmic-Ray Rejection by Laplacian Edge Detection
• A method for optimal image subtraction
• ATLAS: A High-Cadence All-Sky Survey System
• Astrometry.net: Blind astrometric calibration of arbitrary astronomical images
• Mass Loss: Its Effect on the Evolution and Fate of High-Mass Stars
• The Pan-STARRS1 Photometric System
• Supernova Light Curves Powered by Young Magnetars
• Inferring the star-formation histories of massive quiescent galaxies with BAGPIPES: Evidence for multiple quenching mechanisms
• WISeREP - An Interactive Supernova Data Repository
• Initial Performance of the NEOWISE Reactivation Mission
• Automated data reduction workflows for astronomy
• The Pan-STARRS1 Database and Data Products
• Observational constraints on the progenitors of core-collapse supernovae : the case for missing high mass stars
• Luminous Supernovae
• SN 2006gy: Discovery of the most luminous supernova ever recorded, powered by the death of an extremely massive star like Eta Carinae
• Bright Supernovae from Magnetar Birth
• An Empirical Relation between Sodium Absorption and Dust Extinction
• An updated analytic model for the attenuation by the intergalactic medium
• The Star Formation History of the Large Magellanic Cloud
• Physics of Core-Collapse Supernovae in Three Dimensions: a Sneak Preview
• The 1% Concordance Hubble Constant
• Dust in the Early Universe: Dust Formation in the Ejecta of Population III Supernovae
• Detection of circumstellar material in a normal Type Ia Supernova
• Characterizing the V-band light-curves of hydrogen-rich type II supernovae
• Empirical extinction coefficients for the GALEX, SDSS, 2MASS and WISE passbands
• Herschel Detects a Massive Dust Reservoir in Supernova 1987A
• The diversity of Type II supernova versus the similarity in their progenitors
• Design and operation of the ATLAS Transient Science Server
• The Main Sequence of star-forming galaxies across cosmic times
• The Distance to SN 1999em in NGC 1637 from the Expanding Photosphere Method
• SN 2006gy: An extremely luminous supernova in the galaxy NGC 1260
• Supernova Light Curves Powered by Fallback Accretion
• SN 2005ap: A Most Brilliant Explosion
• High Density Circumstellar Interaction in the Luminous Type IIn SN 2010jl: The first 1100 days
• Pair Instability Supernovae: Light Curves, Spectra, and Shock Breakout
• The Evolution of Dust in the Early Universe with Applications to the Galaxy SDSS J1148+5251
• Precursors prior to Type IIn supernova explosions are common: precursor rates, properties, and correlations
• The Most Luminous Supernovae
• Rapid formation of large dust grains in the luminous supernova SN 2010jl
• Dust and the type II-plateau supernova 2004et
• Optical and Infrared Spectroscopy of the type IIn SN 1998S : Days 3-127
• Massive-Star Supernovae as Major Dust Factories
• Detection of a red supergiant progenitor star of a type II-plateau supernova
• Multi-wavelength Observations of the Enduring Type IIn Supernovae 2005ip and 2006jd
• Interacting Supernovae: Types IIn and Ibn
• On the source of the late-time infrared luminosity of SN 1998S and other type II supernovae
• The Exceptionally Luminous Type II-L SN 2008es
• Optical and near infrared coverage of SN 2004et: physical parameters and comparison with other type IIP supernovae
• Condensation of dust in the ejecta of type II-P supernovae
• Discovery of the Ultra-Bright Type II-L Supernova 2008es
• A Spitzer Space Telescope Study of SN 2003gd: Still No Direct Evidence that Core-Collapse Supernovae are Major Dust Factories
• Gaia Photometric Science Alerts
• High star formation rates as the origin of turbulence in early and modern disk galaxies
• Radiative Properties of Pair-instability Supernova Explosions
• The Palomar Transient Factory Core-Collapse Supernova Host-Galaxy Sample. I. Host-Galaxy Distribution Functions and Environment-Dependence of CCSNe
• Massive stars exploding in a He-rich circumstellar medium III. SN 2006jc: IR echoes from new and old dust in the progenitor CSM
• Bright, months-long stellar outbursts announce the explosion of interaction-powered supernovae
• On the nature of Hydrogen-rich Superluminous Supernovae
• SN 2007od: A Type IIP SN with Circumstellar Interaction
• The Rotation Curve of the Large Magellanic Cloud and the Implications for Microlensing
• A Core-Collapse Supernova Model for the Extremely Luminous Type Ic Supernova 2007bi: An Alternative to the Pair-Instability Supernova Model
• Systematic Blueshift of Line Profiles in the Type IIn Supernova 2010jl: Evidence for Post-Shock Dust Formation?
• A Search for Core-Collapse Supernova Progenitors In Hubble Space Telescope Images
• Type IIn supernova light-curve properties measured from an untargeted survey sample
• Dust and the type II-Plateau supernova 2004dj
• Spectra of supernovae in the nebular phase
• Evidence for Pre-Existing Dust in the Bright Type IIn SN 2010jl
• Photometric and Spectroscopic Evolution of the Type IIP SN 2007it to Day 944
• SN 2009ib: A Type II-P Supernova with an Unusually Long Plateau
• Nebular spectra of pair-instability supernovae
• KOOLS--IFU: Kyoto Okayama Optical Low-dispersion Spectrograph with Optical-Fiber Integral Field Unit
• Diversity of Luminous Supernovae from Non-Steady Mass Loss
• Dust formation in the ejecta of the Type II-P supernova 2004dj
• The Evolution of Dust Mass in the Ejecta of SN1987A
• The Automated Photometry Of Transients (AutoPhOT) pipeline
• Properties of Newly Formed Dust Grains in The Luminous Type IIn Supernova 2010jl
• The long-lived Type IIn SN 2015da: Infrared echoes and strong interaction within an extended massive shell
• Delayed Shock-induced Dust Formation in the Dense Circumstellar Shell Surrounding the Type IIn Supernova SN 2010jl
• A Spitzer Space Telescope study of SN 2002hh: an infrared echo from a Type IIP supernova
• Optical observations of the luminous Type IIn Supernova 2010jl for over 900 days
• The effects of dust on the optical and infrared evolution of SN 2004et
• Type II supernovae from the Carnegie Supernova Project-I. I. Bolometric light curves of 74 SNe II using uBgVriYJH photometry
• High-resolution spectroscopy of SN 2017hcc and its blueshifted line profiles from post-shock dust formation
• Supernova 2017eaw: molecule and dust formation from infrared observations
• A decade of ejecta dust formation in the Type IIn SN 2005ip
• Disentangling Dust Components in SN 2010jl: The First 1400 Days
• Late-time X-Ray, UV and Optical Monitoring of Supernova 1979C
• The Evolution of Temperature and Bolometric Luminosity in Type-II Supernovae
• Supernova 2013fc in a circumnuclear ring of a luminous infrared galaxy: the big brother of SN 1998S
• Interaction of a Supernova with a Circumstellar Disk
• The Zwicky Transient Facility phase I sample of hydrogen-rich superluminous supernovae without strong narrow emission lines
• ASASSN-15nx: A luminous Type II supernova with a "perfect" linear decline
• Broad-emission-line dominated hydrogen-rich luminous supernovae
• Super-luminous Type II supernovae powered by magnetars
• Radiative Acceleration of Dense Circumstellar Material in Interacting Supernovae
• SN 2016gsd: An unusually luminous and linear type II supernova with high velocities
• Enormous explosion energy of Type IIP SN 2017gmr with bipolar Ni-56 ejecta
• Sample of hydrogen-rich superluminous supernovae from the Zwicky Transient Facility
• The infrared echo of SN2010jl and its implications for shock breakout characteristics
• SN 2020uem: A Possible Thermonuclear Explosion within A Dense Circumstellar Medium (I) The Nature of Type IIn/Ia-CSM SNe from Photometry and Spectroscopy
• The enigmatic double-peaked stripped-envelope SN 2023aew

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