On the Distribution of Pulsars Around the Galactic Anti-Center Direction

Details On the Distribution of Pulsars Around the Galactic Anti-Center Direction On the Distribution of Pulsars Around the Galactic Anti-Center Direction

Dec 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aas...193.4109h&link_type=abstract

American Astronomical Society, 193rd AAS Meeting, #41.09; Bulletin of the American Astronomical Society, Vol. 30, p.1310

Astronomy and Astrophysics

Astronomy

Scientific paper

A comparison of pulsar dispersion measures versus galactic longitude indicates a remarkably smooth pulsar distribution closer to the anti-center direction (between about l = 130 degrees and l = 230 degrees), with the possible appearance of an apparent ``envelope". This picture, of course, becomes more irregular if we translate the dispersion measures to distances, yet we may hope to derive an upper bound for the pulsars' space distribution. This work is facilitated by some results of a previous study by one of us (C. Reeves-Shull), which showed that most of these pulsars are located in relatively undisturbed environments. By selecting various models of the galactic distribution of free electrons, we find the extent from the galactic center of the pulsar population to be at the very least 12 kpc and possibly as high as 14-15 kpc.

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