A Spectroscopic Study of Binary Star Planetary Nebulae
نویسندگان
چکیده
منابع مشابه
The Kinematic Signature of a Binary Central Star in the Collimated Ejections of Planetary Nebulae
Binary stars are believed to be involved in some way in the formation of many collimated outflows observed in planetary nebulae. The direct detection of binary central stars is observationally difficult, so that indirect methods offer an interesting alternative for inferring the presence of a binary. It has been recently proposed that a difference between the systemic velocity of a collimated (...
متن کاملA spectroscopic study of the binary star γGem
Analysis of an extensive collection of 730 spectroscopic observations of the bright A0IV star γ Gem lead to the following conclusions: (1)A neworbital solution is presented. Some hints of a small gradual increase of the systemic velocity were found but cannot be taken as real until confirmed by continuing observations. There is still no compelling evidence of the apsidal motion, however. (2) A ...
متن کاملBaltic Astronomy BINARY CENTRAL STARS OF PLANETARY NEBULAE
This paper reviews our knowledge on binary central stars of planetary nebulae and presents some personal opinions regarding their evolution. Three types of interactions are distinguished: type I, where the binary companion induces the mass loss; type II, where it shapes the mass loss but does not enhance it; type III, where a wide orbit causes the centre of mass to move, leading to a spiral emb...
متن کاملCollimated Fast Winds in Wide Binary Progenitors of Planetary Nebulae
We discuss the formation of planetary nebulae (PNe) having a pair of lobes, or multi-lobes, in their inner region surrounded by an elliptical or spherical shell or halo. Both elliptical and bipolar PNe are considered; when the lobes are much smaller than the main elliptical shell, the PN is termed elliptical PN, while when the lobes are the main structure of the nebula, the PN is termed bipolar...
متن کاملPlanetary Nebulae in the Scheme of Binary Evolution
In this review I present the binary model for the shaping of planetary nebulae (PNe) as I view it, in the context of historical evolution of other models for the shaping of PNe over more than 30 years. In describing the binary model, I concentrate on works published since the last IAU meeting on PNe. I think stellar companions are behind the shaping of bipolar PNe, i.e., having two lobes with a...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 1993
ISSN: 0074-1809
DOI: 10.1017/s0074180900171797