Hostname: page-component-8448b6f56d-dnltx Total loading time: 0 Render date: 2024-04-23T11:16:50.500Z Has data issue: false hasContentIssue false
  • English
  • Français

The Fluctuations of the Cosmic X-Ray Background as a Sensitive Tool to the Universal Source Distribution

Published online by Cambridge University Press:  14 August 2015

P. Giommi  and
G. F. Bignami
P. Giommi
Affiliation:
Istituto di Fisica Università - Milano
G. F. Bignami
Affiliation:
Istituto di Fisica Cosmica - CNR - Milano

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Recent experimental results (Giacconi et al, 79, Tananbaum et al 79) ascribe an increasingly important role to the contribution of discrete sources to the low-energy (few Kev) cosmic X-ray background (CXB). While the astrophysical nature of the objects involved is not yet clear, distant and powerful emitters like QSO play probably an important role (e.g. Setti and Woltjer 1979, Field 1980). For them, often the number-flux curve (LogN-LogS) provides useful hints on such properties as space distribution and/or evolution. For the case of the X-ray sources, moreover, a definite relation exists between their LogN-LogS and the granularity of the sky emission as described by the fluctuations of the X-ray background.

Type
Research Article
Information
Symposium - International Astronomical Union , Volume 94: Origin of Cosmic Rays , 1981 , pp. 277 - 278
Copyright
Copyright © Reidel 1981 

References

Boldt, E.A., 1980 NASA T.M. n° 80659 Google Scholar
Bonoli, F. et al. 1980 preprint Google Scholar
Braccesi, A. et al. 1980, A&A, 85, 80.Google Scholar
Cavaliere, A. et al, 1973 Ap; J. 182, 405 CrossRefGoogle Scholar
Cavaliere, A. and Setti, G., 1976 A&A 46, 81 Google Scholar
Cavaliere, A. et al, 1979 A&A, 79, 169 Google Scholar
Field, G.B., 1980 Ap. J. in press Google Scholar
Forman, W. et al. 1978 Ap. J. suppl. 38, 357 Google Scholar
Giacconi, R. et al 1979 Ap. J. 234, L1 CrossRefGoogle Scholar
Maccacaro, T. et al. 1979 B.A.A.S. 11, 771 Google Scholar
Setti, G. and Zamorani, G. 1978 A&A 66, 249 Google Scholar
Setti, G. and Woltjer, L. 1979 A&A 76, L1 Google Scholar
Tananbaum, H. et al., 1979, Ap. J. 234, L9.Google Scholar