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Is there a Connection Between Thermal Pulses and PNe Halos: An Approach to an Answer

Published online by Cambridge University Press:  07 August 2017

Adam Frank ,
Bruce Balick  and
Will Van Der Veen
Adam Frank
Affiliation:
Astronomy Department, FM-20, University of Washington, Seattle WA 98195, USA
Bruce Balick
Affiliation:
Astronomy Department, FM-20, University of Washington, Seattle WA 98195, USA
Will Van Der Veen
Affiliation:
Astronomy Department, Columbia University, N.Y., N.Y. 10027, USA

Abstract

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We wish to explore the hypothesis that the shells and halos of planetary nebulae are formed during the thermal pulsing of progenitor AGB stars. Using published data and model results we compare the AGB interpulse time ΔtT and the time between shell ejections ΔtD for a sample of PNe with halos. ΔtT is derived from the Paczynski relation using the PNe central star luminosity. ΔtD is calculated using the radii and velocity of PNe shells and halos.

Type
IV. Planetary Nebulae Connection: Evolution from the AGB
Information
Symposium - International Astronomical Union , Volume 155: Planetary Nebulae , 1993 , pp. 365
Copyright
Copyright © Kluwer 1993