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NAM2012 - All Presentation Details

Record 733 of 756

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Aspherical Planetary Nebulae: Binaries Blowing Bubbles

Author: David Jones

European Southern Observatory

Co-Authors: B. Miszalski (South African Astronomical Observatory), H.M.J. Boffin (European Southern Observatory), A.A. Tyndall (University of Manchester)

Session: STA2: Binary Stars: Duplicity is Everywhere

Presentation type: Talk      11:45  Friday 30th 11:45-13:00 


Central star binarity has long been thought to offer a solution to the vexing problem of how Planetary Nebulae (PNe) form such a wide variety of morphologies. Only now, thanks to recent surveys and improved observing strategies, is it clear that a binary channel is indeed responsible for a large fraction of PNe. Furthermore, our studies have started to identify strong links between binarity and morphology, including bipolarity, jet-like structures and rings of low ionisation material resembling those of SN 1987A. Here, I will review the currently known sample of binary central stars, focusing on our own recent discoveries including intermediate period central stars whose chemical compositions have been altered by a phase of mass transfer traced by the ejected nebula. I will also discuss the importance of the growing sample of "fresh out of the oven" post-common-envelope central stars, and their importance in constraining theories of the poorly understood common-envelope phase of evolution.

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