Accelerating very fast gas in the supernova impostor sn 2009ip with jets from a stellar companion

Abstract

Using hydrodynamical numerical simulations we show that high-velocity ejecta with 10,000 km/s in the outbursts of the supernova impostor SN 2009ip and similar luminous blue variable (LBV) stars can be explained by the interaction of fast jets, having velocity of 2000-3000 km/s, with a circumbinary shell (extended envelope). The density profile in the shell is very steep such that the shock wave, that is excited by the jets' interaction with the shell, accelerates to high velocities as it propagates outward. The amount of very fast ejecta is small, but sufficient to account for some absorption lines. Such an extended envelope can be formed from the binary interaction and/or the unstable phase of the LBV primary star. The jets themselves are launched by the more compact secondary star near periastron passages.

14 pages, 5 figures. Accepted to APJ Letters

References in corpus (7)

• A panchromatic view of the restless SN2009ip reveals the explosive ejection of a massive star envelope
• SN 2009ip and SN 2010mc: Core-collapse Type IIn supernovae arising from blue supergiants
• A Blast Wave from the 1843 Eruption of Eta Carinae
• Possible Implications of Mass Accretion in Eta Carinae
• Powering the Second 2012 Outburst of SN 2009ip by Repeating Binary Interaction
• SN 2009ip and SN 2010mc as dual-shock Quark-Novae
• A Phenomenological Model for the Extended Zone Above AGB Stars

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