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Distances to Planetary Nebulae

Published online by Cambridge University Press:  15 December 2006

Arsen R. Hajian
Arsen R. Hajian
Affiliation:
United States Naval Observatory, 3450 Massachusetts Av, NW, Washington, DC 20392, USA email: hajian@usno.navy.mil.
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Abstract

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In this talk, I describe methods for direct distance estimation to Planetary Nebulae (PNe). I review the foremost of these methods, the Expansion Parallax Distance, and present some recent results from this technique. In addition, I will discuss the major contributions to the systematic and random distance errors resulting from the method (including ionization front motions and deviations from spherical target morphologies), and show preliminary evidence quantifying these effects.

Keywords

planetary nebulae: generalstars: distances
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S234: Planetary Nebulae in our Galaxy and Beyond , April 2006 , pp. 41 - 48
Copyright
© 2006 International Astronomical Union