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|The Cosmic Infrared Background|
Resolving the Cosmic Far-Infrared Background
The Cosmic Far Infrared Background has been measured by Puget et al,
1996 for the first time, and confirmed by Hauser et al., 1998 (see e.g
Hauser and Dwek, 2001 for a review). The CIB is the relic emission at
IR wavelengths of galaxy formation and evolution. Studying the
extragalactic backgrounds (also known as the EBL, Extragalactic
Background Light) is one of the observational challenges of today's
Buildup of the Cosmic Far-Infrared Background since redshift 2 (2011)
Spitzer observations in GOODS and COSMOS fields allowed
Jauzac et al., 2011 AandA (in press,
or ArXiv1009.0419) to
reconstruct the buildup of the CIB at 70 and 160 microns since
redshift 2. Download here
the text file
or IDL save file of the
d(nuBnu)/dz vs z shown in figure 9.
CIB brighteness from Spitzer legacy number counts (2010)
The Spitzer observations at 24 microns resolves 80% of the CIB at this
wavelength. We estimate the total CIB brighteness from our legacy
counts (Bethermin et al., 2010a,
AandA). We extrapolate the faint-end slope of the counts to
estimate the contribution of non-detected populations.
Stacking 24um sources to estimate the Cosmic Far-Infrared Background (2006)
Dole et al (2006, AandA, 451, 417)
resolved the Cosmic IR Background in the Far-Infrared, and compiled
the latest observations of the Extragalactic Background Light (EBL),
in particular for the Cosmic Optical Background (COB) and the Cosmic
Infrared Background (CIB).
CIB Spectral Energy Distribution (SED) (update 2009)
The EBL (Extragalactic Background Light) SED is now well constrained.
You can use this IDL script to
generate the plot of the CIB SED with the latest observational
constraints, as of January 2007.
Lower Limit EBL: data and model (2010)
- http://www.ias.u-psud.fr/irgalaxies -
Groupe Matière Interstellaire et Cosmologie
Institut d'Astrophysique Spatiale (IAS), bat 121, F-91405 Orsay Cedex, France.
Université Paris Sud 11 and CNRS (UMR 8617)