NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-25 T02:45:46 PDT
Help | Comment | NED Home

For refcode 2014MNRAS.440..582M:
Retrieve 10 NED objects in this reference.
Please click here for ADS abstract

NED Abstract

Copyright by Royal Astronomical Society. 2014MNRAS.440..582M Limits on core-driven ILOT outbursts of asymptotic giant branch stars Mcley, Liron; Soker, Noam Abstract. We find that single-star mechanisms for Intermediate-Luminosity Optical Transients (ILOTs; red transients; red novae), which are powered by energy release in the core of asymptotic giant branch (AGB) stars are likely to eject the entire envelope, and hence cannot explain ILOTs in AGB and similar stars. There are single-star and binary models for the powering of ILOTs, which are eruptive stars with peak luminosities between those of novae and supernovae. In single-star models, the ejection of gas at velocities of ~500-1000 km s^-1^ and a possible bright ionizing flash require a shock to propagate from the core outwards. Using a self-similar solution to follow the propagation of the shock through the envelope of two evolved stellar models, a 6 M_sun_ AGB star and an 11 M_sun_ yellow supergiant (YSG) star, we find that the shock that is required to explain the observed mass-loss also ejects most of the envelope. We also show that for the event to have a strong ionizing flash the required energy expels most of the envelope. The removal of most of the envelope is in contradiction with observations. We conclude that single-star models for ILOTs of evolved giant stars encounter severe difficulties. Key words: stars: AGB and post-AGB, stars: mass-loss, stars: variables: general
Retrieve 10 NED objects in this reference.
Please click here for ADS abstract

Back to NED Home