Abstract
MORE than two dozen binary X–ray pulsars have been discovered in our Galaxy 1 . Because of instrumental constraints, however, most of these have been discovered within only a few kiloparsecs (kpc) of the Sun. Here we report the discovery by the Ginga satellite of four X-ray pulsars and three hard X-ray sources in the galactic plane at galactic latitude l ≈30° and a distance of about 10 kpc (the '5–kpc arm ' 2 ). This indicates that the 5–kpc arm has been the site of vigorous formation of X-ray pulsars, and that in general their distribution might be expected to be non-uniform.
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References
Nagase, F. Publs Astr. Soc. Japan 41, 1–79 (1989).
Burton, W. B. A. Rev. Astr. Astrophys. 14, 275–306 (1976).
Turner, M. J. L. et al. Publs Astr. Soc. Japan 41, 345–372 (1989).
Makino, F. Astr. Lett. Commun. 25, 223–233 (1987).
Koyama, K. in Physics of Neutron stars and Black Holes (ed. Tanaka, Y.) 55–65 (Universal Academy Press, Tokyo, 1988).
Makino, F. & the Ginga team, IAU Circ. No. 4661 (1988).
Makino, F. & the Ginga team, IAU Circ. No. 4587 (1988).
Makino, F. & the Ginga team, IAU Circ. No. 4679 (1988).
Hayakawa, S. et al. Astr. Astrophys. 58, 325–330 (1977).
Koyama, K. et al. Publs Astr. Soc. Japan 41, 483–490 (1989).
Rappaport, S. & van den Heuvel, E. P. J. in Be Stars (eds Jaschek, M. & Groth, H.) 327–346 (Reidel, Dordrecht, 1982).
Hayakawa, S. et al. Astr. Astrophys. 100, 116–123 (1980).
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Koyama, K., Kawada, M., Kunieda, H. et al. Is the 5-kpc galactic arm a colony of X-ray pulsars?. Nature 343, 148–149 (1990). https://doi.org/10.1038/343148a0
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DOI: https://doi.org/10.1038/343148a0
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