Winds in collision. I. Geometric implications of the emission lines for V1016 CYG and HM Sge.
Abstract
Emission line profiles and radial velocity data obtained from spectra in the visual region are presented for V1016 Cyg and HM Sge. The profiles of the forbidden emission lines are found to be inconsistent with spherical symmetry for the hot nebular material. It is argued that part of the nebular material in a detached binary system where both stars have spontaneous winds will naturally assume the shape of a curved, roughly conical, shell. The data can be satisfactorily interpreted in terms of the interaction of a low-velocity wind from a red giant with a high-velocity wind from a white dwarf in a detached binary system. This scheme provides a natural assignment of emission line forming regions to different portions of the interaction shell and the two winds, explaining both the profiles and the velocities of the features.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- April 1984
- Bibcode:
- 1984A&A...133..137W
- Keywords:
-
- Line Spectra;
- Radial Velocity;
- Red Giant Stars;
- Stellar Spectra;
- Stellar Winds;
- White Dwarf Stars;
- Binary Stars;
- Emission Spectra;
- Forbidden Transitions;
- Orbits;
- Planetary Nebulae;
- Stellar Models;
- Astrophysics