Volume 552, April 2013
|Number of page(s)||8|
|Section||Stellar structure and evolution|
|Published online||09 April 2013|
Blue supergiant progenitor models of type II supernovae
Astrophysical Institute, Vrije Universiteit Brussel,
Accepted: 6 March 2013
We show that within all the uncertainties that govern the process of Roche-lobe overflow in case Br-type massive binaries, it cannot be excluded that a significant fraction of them merge and become single stars. We demonstrate that at least some of them will spend most of their core helium-burning phase as hydrogen-rich blue stars, populating the massive blue supergiant region and/or the massive Be-type star population. The evolutionary simulations lead us to suspect that these mergers will explode as luminous blue hydrogen-rich stars, and it is tempting to link them to at least some superluminous supernovae.
Key words: binaries: close / stars: massive / supernovae: general / stars: evolution
© ESO, 2013
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