LEADER 04765nam 2200709Ia 450 001 9910455046803321 005 20200520144314.0 010 $a981-283-442-7 035 $a(CKB)1000000000767250 035 $a(EBL)1193448 035 $a(SSID)ssj0000518886 035 $a(PQKBManifestationID)12192103 035 $a(PQKBTitleCode)TC0000518886 035 $a(PQKBWorkID)10495077 035 $a(PQKB)10273797 035 $a(MiAaPQ)EBC1193448 035 $a(WSP)00007001 035 $a(Au-PeEL)EBL1193448 035 $a(CaPaEBR)ebr10688003 035 $a(CaONFJC)MIL491739 035 $a(OCoLC)747539692 035 $a(EXLCZ)991000000000767250 100 $a20080930d2008 uy 0 101 0 $aeng 135 $aur|n|---||||| 181 $ctxt 182 $cc 183 $acr 200 14$aThe light/dark universe$b[electronic resource] $elight from galaxies, dark matter and dark energy /$fJames M. Overduin, Paul S. Wesson 210 $aSingapore ;$aHackensack, NJ $cWorld Scientific$dc2008 215 $a1 online resource (236 p.) 300 $aDescription based upon print version of record. 311 $a981-283-589-X 311 $a981-283-441-9 320 $aIncludes bibliographical references (p. 203-216) and index. 327 $aPreface; Contents; 1. The Enigma of the Dark Night Sky; 1.1 Why is the sky dark at night?; 1.2 ""By reason of distance""; 1.3 Island Universe; 1.4 Non-uniform sources; 1.5 Tired light; 1.6 Absorption; 1.7 Fractal Universe; 1.8 Finite age; 1.9 Dark stars; 1.10 Curvature; 1.11 Ether voids; 1.12 Insufficient energy; 1.13 Light-matter interconversion; 1.14 Cosmic expansion; 1.15 Olbers' paradox today; 2. The Intensity of Cosmic Background Light; 2.1 Bolometric intensity; 2.2 Time and redshift; 2.3 Matter, energy and expansion; 2.4 How important is expansion?; 2.5 Simple at models 327 $a2.6 Curved and multi-uid models2.7 A bright sky at night?; 3. The Spectrum of Cosmic Background Light; 3.1 Spectral intensity; 3.2 Luminosity density; 3.3 The delta function .; 3.4 The normal distribution; 3.5 The thermal spectrum; 3.6 The spectra of galaxies; 3.7 The light of the night sky; 3.8 R.I.P. Olbers' paradox; 4. Dark Cosmology; 4.1 The four dark elements; 4.2 Baryons; 4.3 Dark matter; 4.4 Neutrinos; 4.5 Dark energy; 4.6 Cosmological concordance; 4.7 The coincidental Universe; 5. The Radio and Microwave Backgrounds; 5.1 The cosmological ""constant""; 5.2 The scalar field 327 $a5.3 Decaying dark energy5.4 Energy density; 5.5 Source luminosity; 5.6 Bolometric intensity; 5.7 Spectral energy distribution; 5.8 Dark energy and the background light; 6. The Infrared and Visible Backgrounds; 6.1 Decaying axions; 6.2 Axion halos; 6.3 Bolometric intensity; 6.4 Axions and the background light; 7. The Ultraviolet Background; 7.1 Decaying neutrinos; 7.2 Neutrino halos; 7.3 Halo luminosity; 7.4 Free-streaming neutrinos; 7.5 Extinction by gas and dust; 7.6 Neutrinos and the background light; 8. The X-ray and Gamma-ray Backgrounds; 8.1 Weakly interacting massive particles 327 $a8.2 Pair annihilation8.3 One-loop decay; 8.4 Tree-level decay; 8.5 Gravitinos; 8.6 WIMPs and the background light; 9. The High-Energy Gamma-ray Background; 9.1 Primordial black holes; 9.2 Evolution and density; 9.3 Spectral energy distribution; 9.4 Bolometric intensity; 9.5 Spectral intensity; 9.6 Higher dimensions; 10. The Universe Seen Darkly; Bibliography; Index 330 $aTo the eyes of the average person and the trained scientist, the night sky is dark, even though the universe is populated by myriads of bright galaxies. Why this happens is a question commonly called Olbers' Paradox, and dates from at least 1823. How dark is the night sky is a question which preoccupies astrophysicists at the present. The answer to both questions tells us about the origin of the universe and the nature of its contents - luminous galaxies like the Milky Way, plus the dark matter between them and the mysterious dark energy which appears to be pushing everything apart. In this bo 606 $aOlbers' paradox 606 $aDark matter (Astronomy) 606 $aDark energy (Astronomy) 606 $aGalaxies$xSpectra 606 $aCosmology 608 $aElectronic books. 615 0$aOlbers' paradox. 615 0$aDark matter (Astronomy) 615 0$aDark energy (Astronomy) 615 0$aGalaxies$xSpectra. 615 0$aCosmology. 676 $a523 676 $a523.015 700 $aOverduin$b J. M$g(James Martin),$f1965-$0504522 701 $aWesson$b Paul S$051238 801 0$bMiAaPQ 801 1$bMiAaPQ 801 2$bMiAaPQ 906 $aBOOK 912 $a9910455046803321 996 $aThe light$92110295 997 $aUNINA