Astronomy and Astrophysics – Astronomy
Scientific paper
May 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978natur.273..132h&link_type=abstract
Nature, vol. 273, May 11, 1978, p. 132-134.
Astronomy and Astrophysics
Astronomy
7
Astronomical Models, Companion Stars, Nemesis (Star), Pulsars, Solar System, Black Holes (Astronomy), Dwarf Stars, Neptune (Planet), Neutron Stars, Perturbation Theory, Stellar Spectra, Sun, White Dwarf Stars
Scientific paper
The article evaluates Harrison's (1977) explanation for the six radio pulsars with the smallest observed spin-down rates grouped in a small region of the sky in the direction of the Galactic center. Harrison suggested that the observed spin rates are larger than observed spin rates because the solar system's barycenter is possibly accelerated by a hitherto unobserved companion star to the sun. It is suggested that Harrison's explanation is incorrect because a companion producing such an acceleration would probably have been detected. It is therefore felt that the observed spin-down rates of the six pulsars are intrinsic, their values determined by pulsar-formation characteristics. It is also felt that a strong observational selection effect causes the apparent clustering and that all radio pulsars are symmetric around the Galactic center.
Henrichs Hubertus F.
Staller F. A. R.
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