The Expansion Parallax Distance to NGC 6543

Details The Expansion Parallax Distance to NGC 6543 The Expansion Parallax Distance to NGC 6543

Dec 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aas...193.8206h&link_type=abstract

American Astronomical Society, 193rd AAS Meeting, #82.06; Bulletin of the American Astronomical Society, Vol. 30, p.1376

Astronomy and Astrophysics

Astrophysics

Scientific paper

We present results recently obtained from a continuing program of measuring direct distances to galactic planetary nebulae by detecting the expansion parallaxes of their envelopes. We report on the measurement of the optical expansion parallax of NGC 6543 using two epochs of narrowband HST-WFPC2 data. With images separated in time by <3 years we have measured the ~10 mas motion of the nebula with formal errors of ~10%. We discuss the astrophysical implications of this technical achievement, and the application to population studies of planetary nebulae.

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