NS4 - Massive Stars |
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Speaker |
Tauris, Thomas |
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Coauthors |
Norbert Langer, Philipp Podsiadlowski |
| Talk Title |
Progenitors of Ultra-stripped Supernovae |
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Abstract |
The explosion of ultra-stripped stars in close binaries may explain new discoveries of weak and fast optical transients. Recently, we have demonstrated that helium star companions to neutron stars (NSs) may evolve into naked ~1.5 Msun metal cores, barely above the Chandrasekhar mass limit, by the time they explode. Here we present a new systematic investigation of the progenitor evolution leading to such ultra-stripped supernovae (SNe), in some cases yielding pre-SN envelopes of less than 0.01 Msun. We discuss the nature of these SNe (electron-capture vs iron core-collapse) and their observational classification as Type Ic/Ib. Ultra-stripped SNe may produce low-kick NSs in the mass range 1.10-1.80 Msun and are highly relevant for binary pulsars as well as gravitational wave detection of merging NSs by LIGO/VIRGO. |
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