The double-degenerate, super-Chandrasekhar nucleus of the planetary nebula Henize 2-428

M. Santander-García (), P. Rodríguez-Gil, R. L. M. Corradi, Damon Jones, B. Miszalski, H. M. J. Boffin, M. M. Rubio-Díez and M. M. Kotze
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M. Santander-García: Observatorio Astronómico Nacional, Apartado de Correos 112, E-28803, Alcalá de Henares, Spain
P. Rodríguez-Gil: Instituto de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Spain
R. L. M. Corradi: Instituto de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Spain
B. Miszalski: South African Astronomical Observatory, PO Box 9, Observatory 7935, South Africa
H. M. J. Boffin: European Southern Observatory, Alonso de Córdova 3107, 19001 Casilla, Santiago, Chile
M. M. Rubio-Díez: Centro de Astrobiología, CSIC-INTA, Carretera de Torrejón a Ajalvir, km 4, E-28850 Torrejón de Ardoz, Spain
M. M. Kotze: South African Astronomical Observatory, PO Box 9, Observatory 7935, South Africa

Nature, 2015, vol. 519, issue 7541, 63-65

Abstract: The probable evolution of the planetary nebula Henize 2-428 is examined, from a close binary system in which both stars ejected their envelopes to the white dwarf stage with a short orbital period and combined mass above the Chandrasekhar limit, suggesting that the system should merge in about 700 million years and trigger a type Ia supernova.

Date: 2015
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DOI: 10.1038/nature14124

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