Peculiar Supernovae

Milisavljevic, Dan; Margutti, R.

doi:10.1007/s11214-018-0500-y

Cited by 12 publications

(13 citation statements)

References 147 publications

(174 reference statements)

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“…With the emergence of box-shaped line profiles and a narrow Hα component, Andrews & Smith (2018) regarded the scenario with a previously hidden CSM scenario plausible. This conclusion was echoed by Milisavljevic & Margutti (2018), who presented a late-time (1210 d) spectrum of iPTF14hls and compared it with the Type IIn SN 2009ip, stating that the narrow lines are associated with nearby photoionised material.…”

Section: Spectral Evolution and Narrow Linesmentioning

confidence: 98%

Late-time observations of the extraordinary Type II supernova iPTF14hls

Sollerman

Taddia

Arcavi

et al. 2019

A&A

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Aims. We study iPTF14hls, a luminous and extraordinary long-lived Type II supernova, which lately has attracted much attention and disparate interpretation. Methods. We have presented new optical photometry that extends the light curves up to more than three years past discovery. We also obtained optical spectroscopy over this period, and furthermore present additional space-based observations using Swift and HST. Results. After an almost constant luminosity for hundreds of days, the later light curve of iPTF14hls finally fades and then displays a dramatic drop after about 1000 d, but the supernova is still visible at the latest epochs presented. The spectra have finally turned nebular, and our very last optical spectrum likely displays signatures from the deep and dense interior of the explosion. A highresolution HST image highlights the complex environment of the explosion in this low-luminosity galaxy. Conclusions. We provide a large number of additional late-time observations of iPTF14hls, which are (and will continue to be) used to assess the many different interpretations for this intriguing object. In particular, the very late (+1000 d) steep decline of the optical light curve is difficult to reconcile with the proposed central engine models. The lack of very strong X-ray emission, and the emergence of intermediate-width emission lines including [S II] that we propose originate from dense, processed material in the core of the supernova ejecta, are also key observational tests for both existing and future models.

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Section: Spectral Evolution and Narrow Linesmentioning

confidence: 98%

Late-time observations of the extraordinary Type II supernova iPTF14hls

Sollerman

Taddia

Arcavi

et al. 2019

A&A

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“…Such events might not be extremely rare as Arcavi et al (2018) Several theoretical studies propose different scenarios to account for the properties of iPTF14hls, and in particular for its prolonged light curve, but none can fit all properties of iPTF14hls (e.g., Sollerman et al 2019;Woosley 2018). These scenarios include a pair instability supernova (e.g., Woosley 2018;Vigna-Gómez et al 2019), a magnetar, i.e., a rapidly rotating magnetic NS (e.g., Arcavi et al 2017;Dessart 2018;Woosley 2018), fallback accretion (e.g., Arcavi et al 2017;Wang et al 2018;Liu et al 2019), an interaction of the ejecta with a circumstellar matter (CSM; Andrews & Smith 2017;Milisavljevic & Margutti 2018), and a common envelope jets supernova scenario (CEJSN; e.g., Soker & Gilkis 2018).…”

Section: The Peaks Of the Jets' Mini-explosionsmentioning

confidence: 99%

Emission peaks in the light curve of core collapse supernovae by late jets

Kaplan

Soker

2020

Monthly Notices of the Royal Astronomical Society

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We build a toy model where the central object, i.e., a newly born neutron star or a black hole, launches jets at late times and show that these jets might account for peaks in the light curve of some peculiar core collapse supernovae (CCSNe) when the jets interact with the CCSN ejecta. We assume that the central object accretes fall back material and launches two short-lived opposite jets weeks to months after the explosion. We model each jet-ejecta interaction as a spherically symmetric 'mini explosion' that takes place inside the ejecta. In our toy model late jets form stronger emission peaks than early jets. Late jets with a kinetic energy of only about one percent of the kinetic energy of the CCSN itself might form strong emission peaks. We apply our toy model to the brightest peak of the enigmatic CCSN iPTF14hls that has several extra peaks in its light curve. We can fit this emission peak with our toy model when we take the kinetic energy of the jets to be about one percent of the CCSN energy, and the shocked ejecta mass to be about one percent of the ejecta mass.

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“…The velocities of the Fe II and H α lines remain at approximately 4,000 and 8,000 km s −1 , respectively. A hydrogen-rich and massive star has been suggested as the progenitor of iPTF14hls [2,34].…”

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confidence: 99%

A possible feedback mechanism of outflows from a black hole hyperaccretion disk in the center of jet-driven iPTF14hls

Liu

Song

et al. 2019

Journal of High Energy Astrophysics

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iPTF14hls is an unusually bright, long-lived II-P supernova (SN), whose light curve has at least five peaks. We propose that the outflows from the black hole hyperaccretion systems in the center of the collapsars should continuously inject into the envelope. For a jet-driven core-collapsar model, the outflow feedback results in prolonging the accretion timescale and fluctuating accretion rates in our analytic solutions. Thus, the long period of luminous, varying SN iPTF14hls might originate from the choked jets, which are regulated by the feedback of the strong disk outflows in a massive core-collapsar. One can expect that jet-driven iPTF14hls may last no more than approximately 3,000 days, and the luminosity may quickly decrease in the later stages. Moreover, the double-peak light curves in some SNe might be explained by the outflow feedback mechanism.

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Peculiar Supernovae

Cited by 12 publications

References 147 publications

Late-time observations of the extraordinary Type II supernova iPTF14hls

Late-time observations of the extraordinary Type II supernova iPTF14hls

Emission peaks in the light curve of core collapse supernovae by late jets

A possible feedback mechanism of outflows from a black hole hyperaccretion disk in the center of jet-driven iPTF14hls

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