Two stripped envelope supernovae with circumstellar interaction -- but only one really shows it

Abstract

We present SN 2019tsf (ZTF19ackjszs) and SN 2019oys (ZTF19abucwzt). These two stripped envelope Type Ib supernovae suddenly showed a (re-)brightening in their late light curves. We investigate this in the context of circumstellar material (CSM) interaction with previously ejected material, a phenomenon that is unusual among SE SNe. We analyse observational data, consisting of optical light curves and spectra. For SN 2019oys we also have detections in radio as well as limits from UV and X-rays. Both light curves show spectacular re-brightening after about 100 days. In the case of SN 2019tsf, the re-brightening is followed by a new period of decline, and the spectra never show signs of narrow emission lines that would indicate CSM interaction. On the contrary, SN 2019oys made a spectral makeover from a Type Ib to a spectrum clearly dominated by CSM interaction at the light curve brightening phase. Deep spectra reveal a plethora of narrow high ionization lines, including coronal lines, and the radio observations show strong emission. The rather similar light curve behaviour indicate CSM interaction as the powering source. For SN 2019oys the evidence for a phase where the ejecta hit H-rich material, likely ejected from the progenitor star, is conspicuous. We observe strong narrow lines of H and He, but also a plethora of high ionization lines, including coronal lines, revealing shock interaction. Spectral simulations of SN 2019oys show two distinct density components, one with density > 1e9/cm3, dominated by somewhat broader, low ionization lines of H I, He I, Na I and Ca II, and one with narrow, high ionization lines at a density about 1e6 /cm3. The former is strongly affected by electron scattering. The evidence for CSM interaction in SN 2019oys is corroborated by detections in radio. On the contrary, for SN 2019tsf, we find little evidence in the spectra for any CSM interaction.

arXiv commentResubmitted to A&A after first referee report

References in corpus (66)

• Measuring Reddening with SDSS Stellar Spectra and Recalibrating SFD
• The Swift X-ray Telescope
• The Zwicky Transient Facility: System Overview, Performance, and First Results
• The Swift Ultra-Violet/Optical Telescope
• Methods and results of an automatic analysis of a complete sample of Swift-XRT observations of GRBs
• HI4PI: A full-sky HI survey based on EBHIS and GASS
• The Zwicky Transient Facility: Data Processing, Products, and Archive
• Mass Loss: Its Effect on the Evolution and Fate of High-Mass Stars
• The Tenth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the SDSS-III Apache Point Observatory Galactic Evolution Experiment
• The Zwicky Transient Facility: Science Objectives
• WISeREP - An Interactive Supernova Data Repository
• Pulsational pair instability as an explanation for the most luminous supernovae
• Determining the Type, Redshift, and Age of a Supernova Spectrum
• A Wolf-Rayet-like progenitor of supernova SN 2013cu from spectral observations of a wind
• Generalized Semi-Analytical Models of Supernova Light Curves
• Bolometric light curves and explosion parameters of 38 stripped-envelope core-collapse supernovae
• From Shock Breakout to Peak and Beyond: Extensive Panchromatic Observations of the Type Ib Supernova 2008D associated with Swift X-ray Transient 080109
• The Zwicky Transient Facility: Observing System
• High Density Circumstellar Interaction in the Luminous Type IIn SN 2010jl: The first 1100 days
• Analytical Light Curve Models of Super-Luminous Supernovae: chi^2-Minimizations of Parameter Fits
• Detailed Analysis of Early to Late-Time Spectra of Supernova 1993J
• The Automated Palomar 60-Inch Telescope
• The Arcminute Microkelvin Imager
• The SED Machine: a robotic spectrograph for fast transient classification
• Fully-Automated Reduction of Longslit Spectroscopy with the Low Resolution Imaging Spectrometer at Keck Observatory
• Coronal lines and dust formation in SN 2005ip: Not the brightest, but the hottest Type IIn supernova
• Distance determinations using type II supernovae and the expanding photosphere method
• PTF12os and iPTF13bvn. Two stripped-envelope supernovae from low-mass progenitors in NGC 5806
• The Carnegie Supernova Project I: analysis of stripped-envelope supernova light curves
• Early-time light curves of Type Ib/c supernovae from the SDSS-II Supernova Survey
• Multi-wavelength Observations of the Enduring Type IIn Supernovae 2005ip and 2006jd
• A new method for estimating the bolometric properties of Ibc SNe
• The 6dF Galaxy Survey: Peculiar Velocity Field and Cosmography
• Fundamental properties of core-collapse Supernova and GRB progenitors: predicting the look of massive stars before death
• The GROWTH Marshal: A Dynamic Science Portal for Time-Domain Astronomy
• Optical and Ultraviolet Spectroscopy of SN 1995N: Evidence for Strong Circumstellar Interaction
• Optical and near-infrared observations of SN 2011dh - The first 100 days
• A Fully Automated Integral Field Spectrograph Pipeline for the SEDMachine: pysedm
• Energetic eruptions leading to a peculiar hydrogen-rich explosion of a massive star
• Metamorphosis of SN 2014C: Delayed Interaction Between a Hydrogen Poor Core-collapse Supernova and a Nearby Circumstellar Shell
• Spectrum formation in Superluminous Supernovae (Type I)
• Investigating the properties of stripped-envelope supernovae, what are the implications for their progenitors?
• The Disappearance of the Progenitors of Supernovae 1993J and 2003gd
• Thermal and non-thermal emission from circumstellar interaction
• Predicted FeII Emission-Line Strengths from Active Galactic Nuclei
• Evolutionary Models for Type Ib/c Supernova Progenitors
• Hydrogen-poor Superluminous Supernovae With Late-time H-alpha Emission: Three Events From the Intermediate Palomar Transient Factory
• A hot and fast ultra-stripped supernova that likely formed a compact neutron star binary
• Hubble Space Telescope and Ground-Based Observations of SN 1993J and SN 1998S: CNO Processing in the Progenitors
• The Type IIb SN 2011dh - Two years of observations and modelling of the lightcurves
• Late Emission from the Type Ib/c SN 2001em: Overtaking the Hydrogen Envelope
• The Berkeley Sample of Stripped-Envelope Supernovae
• Strong late-time circumstellar interaction in the peculiar supernova iPTF14hls
• A Digital Correlator Upgrade for the Arcminute MicroKelvin Imager
• Early spectroscopic identification of SN 2008D
• SN 2017ens: The Metamorphosis of a Luminous Broad-lined Type Ic Supernova into an SN IIn
• Lyman Alpha Fluorescent Excitation of FeII in Active Galactic Nuclei
• iPTF15dtg: a double-peaked Type Ic Supernova from a massive progenitor
• SN 2017dio: a type-Ic supernova exploding in a hydrogen-rich circumstellar medium
• Electron scattering wings on lines in interacting supernovae
• The peculiar mass-loss history of SN 2014C as revealed through AMI radio observations
• ZTF18aalrxas: A Type IIb Supernova from a very extended low-mass progenitor
• Late-time observations of the extraordinary Type II supernova iPTF14hls
• Supernova Interaction with a Dense Detached Shell in SN 2001em
• The changing-type SN 2014C may come from an 11-$M_{\odot }$ star stripped by binary interaction and violent eruption
• The Slow Demise of the Long-Lived SN 2005ip

Cited by in corpus (25)

• A Cool and Inflated Progenitor Candidate for the Type Ib Supernova 2019yvr at 2.6 Years Before Explosion
• A Family Tree of Optical Transients from Narrow-Line Seyfert 1 Galaxies
• Seven years of coordinated Chandra-NuSTAR observations of SN2014C unfold the extreme mass-loss history of its stellar progenitor
• An Early-Time Optical and Ultraviolet Excess in the type-Ic SN 2020oi
• The final months of massive star evolution from the circumstellar environment around SN Ic 2020oi
• Three Core-Collapse Supernovae with Nebular Hydrogen Emission
• The broad-lined Type-Ic supernova SN 2022xxf with extraordinary two-humped light curves
• Supernova SN 2020faa -- an iPTF14hls look-alike?
• Clumps and rings of ejecta in SNR 0540-69.3 as seen in 3D
• SN 2018ijp: the explosion of a stripped-envelope star within a dense H-rich shell?
• A population of Type Ibc supernovae with massive progenitors; broad lightcurves not uncommon in (i)PTF
• Optical Rebrightening of Extragalactic Transients from the Zwicky Transient Facility
• The dense and non-homogeneous circumstellar medium revealed in radio wavelengths around the Type Ib SN 2019oys
• Large Cold Dust Reservoir Revealed in Transitional SN Ib 2014C by James Webb Space Telescope Mid-Infrared Spectroscopy
• The Carnegie Supernova Project-I. Optical spectroscopy of stripped-envelope supernovae
• A search for gravitationally lensed supernovae within the Zwicky Transient Facility public survey
• A thermonuclear supernova interacting with hydrogen- and helium-deficient circumstellar material. SN 2020aeuh as a SN Ia-CSM-C/O?
• A Physical Model of Delayed Rebrightenings in Shock-interacting Supernovae without Narrow Line Emission
• On the Binary Nature of the Progenitor of SN2015ap: Insights from Its Light Curve and Spectral Evolution
• The hydrogen-free circumstellar interaction in the Type Ib supernova 2021efd: A clue to the mechanism of the helium-layer stripping
• Giant outbursts of clumpy material preceding Type II supernova 2024qiw
• Modeling the circumstellar interaction around SN 2004gq
• Can circumstellar interaction explain the strange light curve features of Type Ib/c supernovae?
• An infrared echo from a circumstellar disk in the hydrogen- and helium-poor SN 2024aecx
• The nearby He-rich superluminous supernova SN 2021bnw during photospheric phases