Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...333..332c&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 333, Oct. 1, 1988, p. 332-340. NSERC-supported research.
Astronomy and Astrophysics
Astrophysics
28
Absorption Spectra, H I Regions, Hydrogen, Pulsars, Electron Flux Density, Galactic Rotation, Milky Way Galaxy, Stellar Luminosity
Scientific paper
Neutral hydrogen absorption observations have been conducted toward six pulsars in the first quadrant of the Galaxy. A new method of rotational-phase-resolved data acquisition was developed for these measurements to overcome the problems of calibration and compromised efficiency associated with previous techniques. Four of the pulsars studied have extremely large dispersion measures and may therefore be at great distances from earth. Using a model of galactic rotation and the observed H I absorption spectra, distance constraints were derived for these pulsars which confirm their large distances. The inferred values of electron density averaged along these lines of sight are consistent with previous results which trace the general form and magnitude of the Galactic free electron distribution.
Clifton T. R.
Frail Dale A.
Kulkarni Shrinivas R.
Weisberg Joel M.
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