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Galaxies 2018, 6(3), 82; https://doi.org/10.3390/galaxies6030082

Simulations and Modeling of Intermediate Luminosity Optical Transients and Supernova Impostors

Department of Physics, Ariel University, P.O. Box 3, Ariel 40700, Israel
Received: 23 June 2018 / Revised: 30 July 2018 / Accepted: 30 July 2018 / Published: 1 August 2018
(This article belongs to the Special Issue Asymmetric Planetary Nebulae VII)
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Abstract

More luminous than classical novae, but less luminous than supernovae, lies the exotic stellar eruptions known as Intermediate luminosity optical transients (ILOTs). They are divided into a number of sub-groups depending on the erupting progenitor and the properties of the eruption. A large part of the ILOTs is positioned 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. The high energy part of the OTS hosts the supernova impostors—giant eruptions (GE) of very massive stars. We show the results of the 3D hydrodynamical simulations of GEs that expose the mechanism behind these GEs and present new models for recent ILOTs. We discuss the connection between different kinds of ILOTs and suggest that they have a common energy source—gravitational energy released by mass transfer. We emphasize similarities between Planetary Nebulae (PNe) and ILOTs, and suggest that some PNe were formed in an ILOT event. Therefore, simulations used for GEs can be adapted for PNe, and used to learn about the influence of the ILOT events on the central star of the planetary nebula. View Full-Text
Keywords: stellar evolution; late stage stellar evolution; binarity: transients: planetary nebulae stellar evolution; late stage stellar evolution; binarity: transients: planetary nebulae
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Kashi, A. Simulations and Modeling of Intermediate Luminosity Optical Transients and Supernova Impostors. Galaxies 2018, 6, 82.

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