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Pulsations in the Nucleus of Planetary Nebula IC 418?

Published online by Cambridge University Press:  12 April 2016

E. Kuczawska  and
S. Zola
E. Kuczawska
Affiliation:
Mt Suhora Observatory, Pedagogical University, ul. Podchorazych 2, 30-084 Cracow, Poland
S. Zola
Affiliation:
Astronomical Observatory, Jagiellonian University, ul. Orla 171, 30-244 Cracow, Poland

Abstract

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IC 418 belongs to the group of about a dozen planetary nebulae with central stars that show irregular spectroscopic and photometric variations. Recent theoretical results provide arguments that this group may constitute a new class of pulsators. We present new photometric observations of the nucleus of IC 418 showing variations with a timescale of about 1/4 day. We discuss two possible explanations of the observed phenomena: pulsational instability and an unstable wind.

Type
Part 2. Poster Papers
Information
International Astronomical Union Colloquium , Volume 155: Astrophysical Applications of Stellar Pulsation , 1995 , pp. 443 - 444
Copyright
Copyright © Astronomical Society of the Pacific 1995

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