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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
The post-common-envelope, binary central star of the planetary nebula Hen 2-11
Astronomy and Astrophysics, Volume 562, Article A89, Year 2014
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Description
We present a detailed photometric study of the central star system of the planetary nebula Hen 2-11, selected for study because of its low-ionisation filaments and bipolar morphology - traits which have been strongly linked with central star binarity. Photometric monitoring with NTT-EFOSC2 reveals a highly irradiated, double-eclipsing, post-common-envelope system with a period of 0.609 d. Modelling of the lightcurve indicates that the nebular progenitor is extremely hot, while the secondary in the system is probably a K-type main sequence star. The chemical composition of the nebula is analysed, showing Hen 2-11 to be a medium-excitation non-Type i nebula. A simple photoionisation model is constructed determining abundance ratios of C/O and N/O which would be consistent with the common-envelope cutting short the AGB evolution of the nebular progenitor. The detection of a post-common-envelope binary system at the heart of Hen 2-11 further strengthens the link between binary progeny and the formation of axisymmetric planetary nebulae with patterns of low-ionisation filaments, clearly demonstrating their use as morphological indicators of central star binarity. © ESO, 2014.
Authors & Co-Authors
Jones, David
Chile, Santiago
European Southern Observatory Santiago
Chile, Copiapo
Universidad de Atacama
Boffin, Henri M.J.
Chile, Santiago
European Southern Observatory Santiago
Miszalski, Brent
South Africa, Cape Town
South African Astronomical Observatory
South Africa, Cape Town
Southern African Large Telescope Foundation
Wesson, Roger
Chile, Santiago
European Southern Observatory Santiago
Corradi, Romano L.M.
Spain, San Cristobal de la Laguna
Instituto Astrofisico de Canarias
Spain, San Cristobal de la Laguna
Universidad de la Laguna
Tyndall, Amy A.
Chile, Santiago
European Southern Observatory Santiago
United Kingdom, Manchester
The University of Manchester
Statistics
Citations: 36
Authors: 6
Affiliations: 7
Identifiers
Doi:
10.1051/0004-6361/201322797
ISSN:
00046361
e-ISSN:
14320746
Research Areas
Mental Health