DSpace
 

RRI Digital Repository >
04. Astronomy and Astrophysics >
Research Papers (A&A) >

Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/4388

Title: On the origin of the diffuse X-ray background
Authors: Swarup, G.
Subrahmanyan, Ravi
Keywords: baryons
cosmic x rays
cosmology
dark matter
diffuse radiation
relic radiation
bremsstrahlung
high temperature plasmas
intergalactic media
radiation distribution
x ray spectra
Issue Date: 1-Dec-1989
Publisher: American Astronomical Society
Citation: Astrophysical Journal, 1989, Vol.347, p1
Abstract: The possibility that the diffuse X-ray background (XRB) could have been generated by the infall of baryons into the potential wells of dark matter is investigated within the framework of a hot dark matter (neutrino)-dominated universe. The XRB spectrum is fitted with the thermal bremsstrahlung kernel, and constraints on the nature of the infall and properties of the X-ray emitting gas are derived. The results indicate that around xi = 5 infall results in the formation of high-density knots with a hot plasma phase constituting 1 percent or less of the baryonic content of the universe. These dense regions can be regarded as the progenitors of present-day galaxies. Constraints are also derived for forms of dark matter other than neutrinos
Description: Restricted Access.
URI: http://hdl.handle.net/2289/4388
ISSN: 0004-637X
1538-4357 (Online)
Alternative Location: http://adsabs.harvard.edu/abs/1989ApJ...347....1S
http://adsabs.harvard.edu/doi/10.1086/168091
Copyright: 1989 American Astronomical Society
Appears in Collections:Research Papers (A&A)

Files in This Item:

File Description SizeFormat
1989_ApJ_V347_p1.pdfRestricted Access2.04 MBAdobe PDFView/Open

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

 

    RRI Library DSpace