On the Contribution of Unresolved Galactic Stars to the Diffuse Soft X-Ray Background

Using stellar luminosity functions derived from ROSAT data, the contributions of Galactic stars to the diffuse X-ray background are calculated for ROSAT PSPC energy bands. The model follows that of Guillout and coworkers but uses ROSAT rather than Einstein data to determine the intrinsic luminosity distributions. The model adequately predicts the numbers of stellar sources observed in deep ROSAT surveys. The contribution of unresolved stellar sources to the ROSAT All-Sky Survey at the Galactic poles is 6.85, 4.76, and 4.91 × 10-6 counts s-1 arcmin-2 in bands R12 ( keV), R45 ( keV), and R67 (1.5 keV), respectively, which is equivalent to 4.66, 31.3, and 26.9 × 10-14 ergs cm-2 s-1 deg-2.

• Publication year

  2001

• Venue

  The Astrophysical Journal

• Publication date

  2001-02-12

• Fields of study

  Physics

• Identifiers
  DOI 10.1086/321421arXiv astro-ph/0102206
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

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