The Ism from the Soft X-ray Background Perspective

  • S. L. Snowden
Conference paper
Part of the Astrophysics and Space Science Library book series (ASSL, volume 309)


In the past few years progress in understanding the local and Galactic ISM in terms of the diffuse X-ray background has been as much about what hasn’t been seen as it has been about detections. High resolution spectra of the local SXRB have been observed, but are inconsistent with current thermal emission models. An excess over the extrapolation of the high-energy (most clearly visible at E > 1.5 keV) extragalactic power law down to ¾ keV has been observed but only at the level consistent with cosmological models, implying the absence of at least a bright hot Galactic halo. A very recent FUSE result indicates that O VI emission from the Local Hot Bubble is insignificant, if it exists at all, a result which is also inconsistent with current thermal emission models. A (very) short review of the Galactic SXRB and ISM is presented.


Galactic Center Galactic Plane Galactic Halo Virgo Cluster Galactic Bulge 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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  1. Cravens, T. E., Robertson, I. P., and Snowden, S. L. 2001, JGR, 106, 24883ADSCrossRefGoogle Scholar
  2. Giacconi, R., et al. 2001, ApJ, 551, 624ADSCrossRefGoogle Scholar
  3. Hasinger, G., et al. 1993, A&A, 275, 1ADSGoogle Scholar
  4. Knie, K., et al. 1999, PhRvL, 83, 18ADSGoogle Scholar
  5. Kuntz, K. D., and Snowden, S. L. 2001a, ApJ, 543, 195ADSCrossRefGoogle Scholar
  6. Kuntz, K. D., and Snowden, S. L. 2001b, ApJ, 554, 684ADSCrossRefGoogle Scholar
  7. Kuntz, K. D., Snowden, S. L., and Mushotzky, R. F. 2001, ApJL, 548, 119CrossRefGoogle Scholar
  8. Lallement, R. 2003, A&A, submittedGoogle Scholar
  9. Maíz-Apellániz, J. 2001, ApJL, 560, L83CrossRefGoogle Scholar
  10. McCammon, D., et al. 2002, ApJ, 576, 188ADSCrossRefGoogle Scholar
  11. McKee, C. F., and Ostriker, J. P. 1977, ApJ, 218, 148ADSCrossRefGoogle Scholar
  12. Mushotzky, R. F., Cowie, L. L., Barger, A. J., and Arnaud, K. A. 2000, Nature, 404, 459ADSCrossRefGoogle Scholar
  13. Sanders, W. T., et al. 2001, ApJ, 554, 694ADSCrossRefGoogle Scholar
  14. Schlegel, D. J., Finkbeiner, D. P., and Davis, M. 1998, ApJ, 500, 525ADSCrossRefGoogle Scholar
  15. Sfeir, D. M., Lallement, R., Crifo, E, and Welsh, B. Y. 1999, A&A, 346, 785ADSGoogle Scholar
  16. Shelton, R. 2003, ApJ, in pressGoogle Scholar
  17. Snowden, S. L. 2001, Lan in The Century of Space Science, Klewer Academic Publishers, 581Google Scholar
  18. Snowden, S. L., et al. 1997, ApJ, 485, 125ADSCrossRefGoogle Scholar
  19. Snowden, S. L., et al. 1998, ApJ, 493, 715ADSCrossRefGoogle Scholar
  20. Wang, Q. D. 1998, Lecture Notes in Physics, 506, 503ADSCrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media Dordrecht 2004

Authors and Affiliations

  • S. L. Snowden
    • 1

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