Accession Number:

ADA510418

Title:

Astrometry With the Hubble Space Telescope: Trigonometric Parallaxes of Planetary Nebula Nuclei NGC 6853, NGC 7293, ABELL 31, and DeHt 5

Descriptive Note:

Journal article

Corporate Author:

TEXAS UNIV AT AUSTIN

Report Date:

2009-12-01

Pagination or Media Count:

17.0

Abstract:

We present absolute parallaxes and relative proper motions for the central stars of the planetary nebulae NGC 6853 The Dumbbell, NGC 7293 The Helix, Abell 31, and DeHt 5. This paper details our reduction and analysis using DeHt 5 as an example. We obtain these planetary nebula nuclei PNNi parallaxes with astrometric data from Fine Guidance Sensors FGS 1r and FGS 3, white-light interferometers on the Hubble Space Telescope. Proper motions, spectral classifications and VJHKT2M and DDO51 photometry of the stars comprising the astrometric reference frames provide spectrophotometric estimates of reference star absolute parallaxes. Introducing these into our model as observations with error, we determine absolute parallaxes for each PNN.

Subject Categories:

  • Astronomy
  • Astrophysics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE