Investigations of supernovae and supernova remnants in the era of SKA

Wang, Lingzhi; Cui, Xiaohong; Zhu, Hui; Tian, Wenwu

doi:10.22323/1.215.0064

Cited by 10 publications

(6 citation statements)

References 25 publications

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“…Radio emission is expected from a single degenerate case as a result of the interaction with the CSM deposited by the companion star (Wang et al 2015).…”

Section: Radio Observations Of Type Ia Supernova Explosionsmentioning

confidence: 99%

Cosmic Ray Production in Supernovae

et al. 2018

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We give a brief review of the origin and acceleration of cosmic rays (CRs), emphasizing the production of CRs at different stages of supernova evolution by the first-order Fermi shock acceleration mechanism. We suggest that supernovae with trans-relativistic outflows, despite being rather rare, may accelerate CRs to energies above 10 18 eV over the first year of their evolution. Supernovae in young compact clusters of massive stars, and interaction powered superluminous supernovae, may accelerate CRs well above the PeV regime. We discuss the acceleration of the bulk of the galactic CRs in isolated supernova remnants and re-acceleration of escaped CRs by the multiple shocks present in superbubbles produced by associations of OB stars. The effects of magnetic field amplification by CR driven instabilities, as well as superdiffusive CR transport, are discussed for nonthermal radiation produced by nonlinear shocks of all speeds including trans-relativistic ones.

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“…Radio emission is expected from a single degenerate case as a result of the interaction with the CSM deposited by the companion star (Wang et al 2015).…”

Section: Radio Observations Of Type Ia Supernova Explosionsmentioning

confidence: 99%

Cosmic Ray Production in Supernovae

et al. 2018

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“…Deviations from the canonical spectral behaviour of synchrotron emission are expected at this very low frequency when the hadronic process dominates over the leptonic one as the origin of γ-ray emission. In fact in this case radio emission is mainly due to secondary electrons generated in pp collisions (Wang et al 2015). An analogue difference in the spectral energy distribution is expected to be observed with the CTA, resulting in an independent test of the same phenomenon.…”

Section: Connection Between Ska and Ctamentioning

confidence: 99%

Synergy SKA - CTA: Supernova remnants as cosmic accelerators

et al. 2017

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Supernova remnants (SNRs) are one of the most important sites where particles are accelerated with high efficiency and in a wide range of energies, becoming an important component of cosmic rays. A good test for this hypothesis will be possible using the data collected by next-generation radio and gamma-ray observatories, like the Square Kilometre Array (SKA) and the Cherenkov Telescope Array (CTA). Radio emission is fundamental to explore the SNR environment and to shed light on the physical processes involved in particle acceleration, providing direct links to high-energy physics. Two cases of SNRs recently studied in radio are presented, showing the importance of high-resolution radio images. An overview of SKA and its precursors is given with our ongoing preparation work. In particular, we present the EMU survey and the pathfinder project SCORPIO. Finally a direct view of the tight connection between SKA and CTA future studies of SNRs is provided.

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“…We would also be able to follow-up bright supernovae for a longer time. Commensal observations along with a weekly cadence is likely to result in the most complete sample of radio supernovae (Pérez-Torres et al , 2014;Wang et al, 2015). With an improved sensitivity level of 1 uJy, one can detect the brightest of radio SNe, such as the Type IIn SN 1988Z up to redshift of z=1.…”

Section: Radio Supernova Searches With Skamentioning

confidence: 99%

Explosive and Radio-Selected Transients: Transient Astronomy with Square Kilometre Array and its Precursors

et al. 2016

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With the high sensitivity and wide-field coverage of the Square Kilometre Array (SKA), large samples of explosive transients are expected to be discovered. Radio wavelengths, especially in commensal survey mode, are particularly well suited for uncovering the complex transient phenomena. This is because observations at radio wavelengths may suffer less obscuration than in other bands (e.g. optical/IR or Xrays) due to dust absorption. At the same time, multiwaveband information often provides critical source classification rapidly than possible with only radio band data. Therefore, multiwaveband observational efforts with wide fields of view will be the key to progress of transients astronomy from the middle 2020s offering unprecedented deep images and high spatial and spectral resolutions. Radio observations of gamma ray bursts (GRBs) with SKA will uncover not only much fainter bursts and verifying claims of sensitivity limited population versus intrinsically dim GRBs, they will also unravel the enigmatic population of orphan afterglows. The supernova rate problem caused by dust extinction in optical bands is expected to be solved in the SKA era. In addition, the debate of single degenerate scenario versus double degenerate scenario will be put to rest for the progenitors of thermonuclear supernovae, since highly sensitive measurements will lead to very accurate mass loss estimation in these supernovae. One also expects to detect gravitationally lensed supernovae in far away Universe in the SKA bands. Radio counterparts of the gravitational waves are likely to become a reality once SKA comes online. In addition, SKA is likely to discover various new kinds of transients.

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Investigations of supernovae and supernova remnants in the era of SKA

Cited by 10 publications

References 25 publications

Cosmic Ray Production in Supernovae

Cosmic Ray Production in Supernovae

Synergy SKA - CTA: Supernova remnants as cosmic accelerators

Explosive and Radio-Selected Transients: Transient Astronomy with Square Kilometre Array and its Precursors

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