Global energetics: fossil memory (metals) vs ... - David Elbaz

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Global energetics: fossil memory (metals) vs background light Contribution of "Black Holes" to the cosmic background light: M BH ~ 2x10 -3 x M * (bulges) & ρ bulges ~ 3.5 x 10 -29 kg m -3 => ρ BH ~ 4.6 [-1.4,+1.9] x 10 -32 kg m -3 (Marconi & Hunt 08) Gravitational accretion (SMBH growth) converts mass into light with an efficiency of η~5-10 % & IGL SMBH = η x ρ BH c 3 / (4π x (1+z)) = 9±5 /(1+z) nW m -2 sr -1 For z~1, we get : IGL SMBH ~ 5±3 nW m -2 sr -1 To be compared to: IGL nucleosynthesis ~ 40±30 nW m -2 sr -1 Per unit mass accretion is 10 times more efficient than nucleosynthesis (~7% vs 0.7%) But on average nucleosynthesis produces 10 times more energy than accretion. ~23 nWm -2 sr -1 Galaxies J1 - David Elbaz Fond diffus extragalactique Page 10 Dole et al (2006) ~24 nWm -2 sr -1 0.1 nW m -2 sr -1
Le Borgne et al. (2009) Cosmic history of star formation vs accretion Wang et al. 08 Galaxies J1 - David Elbaz Fond diffus extragalactique Page 11
Page 1 and 2: Global energetics: fossil memory (m
Page 3 and 4: En réalité les « métaux » sont
Page 5 and 6: Le fond diffus cosmologique A l’
Page 7 and 8: Le fond diffus cosmologique 1. Mesu
Page 9: La masse des Trous Noirs Supermassi
Page 13 and 14: Stacked MIPS 70 µm (25mJy-3σ) ima
Page 15: Sensitivity limits of IR surveys at
Page 18 and 19: Galaxies J1 - David Elbaz Fond diff
Page 20 and 21: Near future: Herschel (followed by
Page 22 and 23: Hasinger ‘00 300µm 3µm 300nm 0.
Page 24: Spitzer-24µm "GOODS" Daddi et al.

Global energetics: fossil memory (metals) vs ... - David Elbaz

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