Weak low-latitude X-ray sources and local galactic structure

Details Weak low-latitude X-ray sources and local galactic structure Weak low-latitude X-ray sources and local galactic structure

Jul 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979natur.280..298m&link_type=abstract

Nature, vol. 280, July 26, 1979, p. 298, 299.

Computer Science

2

Galactic Structure, Milky Way Galaxy, Spatial Distribution, Star Distribution, X Ray Sources, B Stars, O Stars, Solar System, Statistical Distributions

Scientific paper

The distribution of weak, low-latitude X-ray sources is discussed in relation to the structure of the local solar neighborhood. The latitudinal distribution of all known X-ray sources with an intensity between 4 and 200 cps, most of which are believed to be in the solar neighborhood, is examined, and it is found that twice as many are located below the galactic plane as above it. This distribution of X-ray sources is used to explain the -0.4 slope of the log N/log S relation. It is suggested that the density function of weak X-ray sources in the solar neighborhood is similar to that of B stars, and that the X-ray sources may correspond to such B1 supergiant stars as Wray 977, which exhibits a small X-ray flux due to a relatively large separation of stellar components. A negative source density gradient in the solar neighborhood is proposed to explain the distribution of low-luminosity X-ray sources.

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