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Long-term Photometric and Spectral Study of Planetary Nebula Variability (1968-2005)

Published online by Cambridge University Press:  15 December 2006

E. B. Kostyakova
E. B. Kostyakova
Affiliation:
Sternberg State Astronomical Institute of Moscow University, Moscow, Russia email: ekost@sai.msu.su
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Abstract

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The results of long term observations of photometric ($UBV$) and spectral variability of several PNe are presented. For the most variable nebulae, IC 4997 and NGC 6572, showing both photometric and spectral changes in time, the main physical parameters ($T_{e}$, $N_{e}$ and $T_{*}$) and their time variations were estimated and discussed.

Keywords

planetary nebulaephotometryspectroscopic observationsvariability
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S234: Planetary Nebulae in our Galaxy and Beyond , April 2006 , pp. 441 - 442
Copyright
© 2006 International Astronomical Union