Angular Diameters of Compact Planetary Nebulae

Details Angular Diameters of Compact Planetary Nebulae Angular Diameters of Compact Planetary Nebulae

1993-09-14

arxiv.org/abs/astro-ph/9309020v1

Astron.Astrophys.283:955,1994

Astronomy and Astrophysics

Astrophysics

(LaTeX 8 pages; send email to tbedding@eso.org for figures). Accepted for publication in Astronomy and Astrophysics. ESO-TRB02

Scientific paper

We have obtained H$\alpha$ CCD images of 21 compact planetary nebulae in the galactic bulge. All objects are resolved and, after deconvolving the seeing disk, we find diameters of 1--2$''$ with typical uncertainties of 20\%. The values are generally in good agreement with radio measurements but are smaller than older optical measurements. Based on the new values, we find that the Shklovsky method for distance determination greatly overestimates the actual distance for all of our objects.

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