2016
DOI: 10.1093/mnras/stw123
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Novae as Tevatrons: prospects for CTA and IceCube

Abstract: The discovery of novae as sources of ∼ 0.1 − 1 GeV gamma-rays highlights the key role of shocks and relativistic particle acceleration in these transient systems. Although there is evidence for a spectral cut-off above energies ∼ 1 − 100 GeV at particular epochs in some novae, the maximum particle energy achieved in these accelerators has remained an open question. The high densities of the nova ejecta (∼ 10 orders of magnitude larger than in supernova remnants) render the gas far upstream of the shock neutral… Show more

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Cited by 55 publications
(62 citation statements)
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“…The observed range of luminosities are obtained if the acceleration efficiency of relativistic particles at the shock is ∼ 0.3%, similar to those expected due to ion acceleration at the corrugated interface of radiative shocks (Steinberg & Metzger 2018) and thus further supporting a hadronic origin for the gamma-ray emission (e.g. Metzger et al 2016;Li et al 2017;Martin et al 2018).…”
Section: Discussionsupporting
confidence: 69%
“…The observed range of luminosities are obtained if the acceleration efficiency of relativistic particles at the shock is ∼ 0.3%, similar to those expected due to ion acceleration at the corrugated interface of radiative shocks (Steinberg & Metzger 2018) and thus further supporting a hadronic origin for the gamma-ray emission (e.g. Metzger et al 2016;Li et al 2017;Martin et al 2018).…”
Section: Discussionsupporting
confidence: 69%
“…[76,77]). A weak neutrino signal could also be expected in this case [78]. In the alternative ICbased models, internal shocks may also be taking place, but their contribution would be ∼negligible [79].…”
Section: Cne: Open Questionsmentioning
confidence: 94%
“…4. An investigation of the gamma ray emission of non-symbiotic novae and the role of the hadronic and leptonic models has been presented by [62], [63]. The gamma ray emission in novae probes the physical processes related to the relativistic particle acceleration at non relativistic shocks [62].…”
Section: Pos(apcs2016)052mentioning
confidence: 99%
“…The discovery of gamma ray emission of novae in the range 0.1 to 1 GeV has triggered the investigation of the shocks and the relativistic particle acceleration involved in the outburst [63]. The gas upstream of the shock is neutral and shielded by ionization.…”
Section: Pos(apcs2016)052mentioning
confidence: 99%