The X-ray shadow of the high-latitude molecular cloud MBM 12

Details The X-ray shadow of the high-latitude molecular cloud MBM 12 The X-ray shadow of the high-latitude molecular cloud MBM 12

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...409l..21s&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 409, no. 1, p. L21-L24.

Astronomy and Astrophysics

Astronomy

69

Background Radiation, Molecular Clouds, Shadows, X Ray Sources, Diffuse Radiation, Interstellar Radiation, X Ray Astronomy

Scientific paper

ROSAT XRT/PSPC observations show a deep shadow cast by the high-latitude molecular cloud MBM 12 in the 3/4 keV diffuse background. Modeling of the shadow implies that less than 20 percent of the typical high-latitude 3/4 keV diffuse background intensity is emitted in front of the cloud (D = 60-70 pc). A weaker shadow consistent with the lower optical depth at higher energies was observed in the 1.5 keV band. Since little shadowing was seen in the 1/4 keV band, this observation places strong constraints on the amount of 0.5-2 keV emission that is intermixed with the source of the observed 1/4 keV flux.

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