Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998cha%26a..22..288h&link_type=abstract
Chinese Astronomy and Astrophysics, Volume 22, Issue 3, p. 288-298.
Astronomy and Astrophysics
Astrophysics
Scientific paper
Binary interactions play an important role in the formation and shaping of planetary nebulae. In this paper, different evolutionary channels of binary stars and their importance in the formation of bipolar planetary nebulae are investigated. Using a Monte-Carlo technique, we explore the consequences of different mass-ratio distributions, diferent initial-final mass relations as well as different theoretical assumptions concerning the modelling of the common-envelope phase. We have come to the following conclusions: (1) The morphology of 34% to 43% of all PNe's may be affected by binary interactions; (2) The main types of binary interactions considered (gravitational focussing, common-envelope ejection and binary merger) are of comparable importances; (3) Massive binaries are slightly more likely to produce bipolar PNe, provided that the initial mass-ratio distribution is biased towards a mass ratio near unity; (4) The ejection of the common envelope may be very efficient; (5) Our simulations support the initial-final mass relation proposed by Han, Podsiadlowski and Eggleton and the use of PNe as a standard distance candle.
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