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arXiv · astro-ph/9807107

Evidence for the Galactic X-ray Bulge II

S. Park·J. P. Finley·T. M. Dame
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Abstract

A mosaic of 5 \ros~PSPC pointed observations in the Galactic plane ($l\sim25^{\circ}$) reveals X-ray shadows in the $0.5-2.0$ keV band cast by distant molecular clouds. The observed on-cloud and off-cloud X-ray fluxes indicate that $\sim15$% and $\sim37$% of the diffuse X-ray background in this direction in the \tq~keV and 1.5 keV bands, respectively, originates behind the molecular gas which is located at $\sim$3 kpc from the Sun. The implication of the derived background X-ray flux beyond the absorbing molecular cloud is consistent with, and lends further support to recent observations of a Galactic X-ray bulge.

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S. Park, J. P. Finley, T. M. Dame. 1998-07-10. Evidence for the Galactic X-ray Bulge II. https://doi.org/10.1086/306468

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