Talk detail

Participant	Tauris, Thomas
Institution	AIfA, University of Bonn - Auf dem Huegel 71 - Bonn - NRW - Germany

Session	BN3	Accepted	Yes	Order	7	Time	17:30	15'
Talk	Oral abstract	Title	Ultra-stripped Supernovae and Double Neutron Star Systems
Coauthors
Abstract	The evolution of close-orbit progenitor binaries of double neutron star (DNS) systems leads to supernova (SN) explosions of ultra-stripped stars. The amount of SN ejecta mass is very limited from such, more or less, naked metal cores with envelope masses of only 0.01-0.2 Msun. The combination of little SN ejecta mass and the associated possibility of small NS kicks is quite important for the characteristics of the resulting DNS systems left behind. In this talk, I discuss theoretical predictions for DNS systems and compare with observations.
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Session	NS4	Accepted	Yes	Order	1	Time	14:30	25' + 5'
Talk	Oral abstract	Title	Progenitors of Ultra-stripped Supernovae
Coauthors	Norbert Langer, Philipp Podsiadlowski
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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Session	BN3	Accepted	No	Order		Time
Talk	Oral abstract	Title	Introduction
Coauthors
Abstract	Introduction
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