Preprint Article Version 1 This version is not peer-reviewed

Simulations and Modeling of Intermediate Luminosity Optical Transients and Supernova Impostors

Version 1 : Received: 23 June 2018 / Approved: 25 June 2018 / Online: 25 June 2018 (10:30:21 CEST)

A peer-reviewed article of this Preprint also exists.

Kashi, A. Simulations and Modeling of Intermediate Luminosity Optical Transients and Supernova Impostors. Galaxies 2018, 6, 82. Kashi, A. Simulations and Modeling of Intermediate Luminosity Optical Transients and Supernova Impostors. Galaxies 2018, 6, 82.

Journal reference: Galaxies 2018, 6, 82
DOI: 10.3390/galaxies6030082

Abstract

Intermediate-luminosity-optical-transients (ILOTs) are stellar outbursts with luminosity between those of classical novae and supernovae. They are divided into a number of sub-groups depending on the erupting progenitor and the properties of the eruption. Many of the ILOTs sit on the slanted Optical Transient Stripe (OTS) in the Energy-Time Diagram (ETD) that shows their total energy vs. duration of their eruption. We describe the different kinds of ILOTs that populate the OTS and other parts of the ETD. We also stand on similarities between Planetary Nebulae (PN) to ILOTs, and suggest that some PNe were formed in an ILOT event. The high energy part of the OTS is reserved to the supernova impostors -- giant eruption of very massive stars. We show results of 3D hydrodynamical simulations of supernova impostors that expose the mechanism behind these giant eruptions, and present new models for recent ILOTs. We stand on the connection between different kinds of ILOTs, and suggest that they are powered by a similar source of energy -- gravitational energy released by mass transfer.

Subject Areas

stellar evolution; late stage stellar evolution; binarity; transients; planetary nebulae

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