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High-Resolution Radial Velocity and Hα Study of Proto-Planetary Nebulae

Published online by Cambridge University Press:  07 August 2017

B.J. Hrivnak  and
A.W. Woodsworth
B.J. Hrivnak
Affiliation:
Dept. of Physics and Astronomy, Valparaiso University, Valparaiso, IN 46383 USA
A.W. Woodsworth
Affiliation:
Dominion Astrophysical Observatory, 5071 W. Saanich Rd., Victoria, BC V8X 4M6 Canada

Extract

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We are engaged in a program to monitor radial velocity variability in proto-planetary nebulae (PPN). Observations are being made with the radial velocity spectrometer at the DAO, with a precision of ±0.5 km s−1. Radial velocity variability can arise from binary motion and/or pulsation in these post-AGB stars. The demonstration of a binary nature for some of these objects can have important implications for the understanding of their physical properties, and for the shaping of their circumstellar shells.

Type
IV. Planetary Nebulae Connection: Evolution from the AGB
Information
Symposium - International Astronomical Union , Volume 155: Planetary Nebulae , 1993 , pp. 354
Copyright
Copyright © Kluwer 1993