Open AccessTrigonometric Parallaxes of Central Stars of Planetary Nebulae
Author(s) -
Hugh C. Harris,
C. C. Dahn,
B. Canzian,
H. H. Guetter,
S. K. Leggett,
S. E. Levine,
C. B. Luginbuhl,
A. K. B. Monet,
D. G. Monet,
Jeffrey R. Pier,
Ronald C. Stone,
T. Tilleman,
F. J. Vrba,
Richard L. Walker
Publication year - 2007
Publication title -
the astronomical journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.61
H-Index - 271
eISSN - 1538-3881
pISSN - 0004-6256
DOI - 10.1086/510348
Subject(s) - parallax , stars , physics , planetary nebula , astrophysics , trigonometry , astronomy , astrometry , spectral line , mathematics , geometry
Trigonometric parallaxes of 16 nearby planetary nebulae are presented,including reduced errors for seven objects with previous initial results andresults for six new objects. The median error in the parallax is 0.42 mas, andtwelve nebulae have parallax errors less than 20 percent. The parallax forPHL932 is found here to be smaller than was measured by Hipparcos, and thispeculiar object is discussed. Comparisons are made with other distanceestimates. The distances determined from these parallaxes tend to beintermediate between some short distance estimates and other long estimates;they are somewhat smaller than estimated from spectra of the central stars.Proper motions and tangential velocities are presented. No astrometricperturbations from unresolved close companions are detected.Comment: 24 pages, includes 4 figures. Accepted for A
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