Testing the binary hypothesis for the formation and shaping of planetary nebulae

Autor:	Douchin, D., De Marco, O., Jacoby, G. H., Hillwig, T. C., Frew, D. J., Bojicic, I., Jasniewicz, G., Parker, Q. A.
Rok vydání:	2012
Předmět:	Astrophysics - Solar and Stellar Astrophysics
Druh dokumentu:	Working Paper
Popis:	There is no quantitative theory to explain why a high 80% of all planetary nebulae are non-spherical. The Binary Hypothesis states that a companion to the progenitor of a central star of planetary nebula is required to shape the nebula and even for a planetary nebula to be formed at all. A way to test this hypothesis is to estimate the binary fraction of central stars of planetary nebulae and to compare it with that of the main sequence population. Preliminary results from photometric variability and the infrared excess techniques indicate that the binary fraction of central stars of planetary nebulae is higher than that of the main sequence, implying that PNe could preferentially form via a binary channel. This article briefly reviews these results and current studies aiming to refine the binary fraction. Comment: EUROWD12 Proceedings
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1210.6226 Zobrazit plný text záznamu View this record from Arxiv