Cosmology and the cosmic infrared background radiation

1996 ◽  
Author(s):  
P. J. E. Peebles
Keyword(s):  
Background Radiation ◽  
Infrared Background ◽  
Cosmic Infrared Background

scholarly journals The COBE DIRBE Search for the Cosmic Infrared Background

1996 ◽  
Vol 168 ◽  
pp. 99-108
Author(s):  
Michael G. Hauser
Keyword(s):  
Spectral Range ◽  
Background Radiation ◽  
Spectral Band ◽  
Current Approach ◽  
Cosmic Background ◽  
Infrared Background ◽  
Cosmic Infrared Background

The Diffuse Infrared Background Experiment (DIRBE) on the Cosmic Background Explorer (COBE) satellite is designed to conduct a sensitive search for isotropic cosmic infrared background radiation over the spectral range from 1.25 to 240 μm. The cumulative emissions of pregalactic, protogalactic, and evolving galactic systems are expected to be recorded in this background. The DIRBE instrument has mapped the full sky with high redundancy at solar elongation angles ranging from 64°to 124°to facilitate separation of interplanetary, Galactic, and extragalactic sources of emission. Conservative limits on the isotropic infrared background are given by the minimum observed sky brightnesses in each DIRBE spectral band during the 10 months of cryogenic operation. Extensive modeling of the foregrounds is under way to isolate or strongly limit the extragalactic infrared component. The current approach to these modeling efforts is described and representative present residuals are reported.

scholarly journals The Cosmic Infrared Background

1992 ◽  
Vol 9 ◽  
pp. 291-296 ◽  
Author(s):  
M. G. Hauser
Keyword(s):  
Background Radiation ◽  
Initial Examination ◽  
Submillimeter Wavelength ◽  
Cosmic Background ◽  
Upper Limits ◽  
Infrared Background ◽  
External Galaxies ◽  
Cosmic Infrared Background ◽  
Luminous Objects ◽  
Lower Limits

AbstractCosmic infrared background radiation, expected to carry the radiative record of luminous objects since they first formed, has yet to be detected. The Diffuse Infrared Background Experiment (DIRBE) on the Cosmic Background Explorer (COBE) satellite is designed to search for this primeval background over the spectral range from 1 to 300 μm. Initial examination of data from this experiment show that foreground radiations from the solar system and Galaxy dominate the diffuse infrared sky brightness, with relative minima near 3.5 μm and in the submillimeter wavelength range. DIRBE measurements do not confirm some previous data from rockets and IRAS. Preliminary upper limits on the cosmic infrared background are generally above theoretical expectations for pregalactic and protogalactic sources, and substantially above estimated lower limits based upon observations of external galaxies. Careful foreground modeling is required to reduce these limits or identify an isotropic residual.

scholarly journals Future Cosmic Microwave and Cosmic Infrared Background Measurements

1996 ◽  
Vol 168 ◽  
pp. 419-421
Author(s):  
John C. Mather
Keyword(s):  
Early Universe ◽  
Background Radiation ◽  
Space Technology ◽  
New Instrument ◽  
Infrared Background ◽  
Cosmic Infrared Background ◽  
Near Future

Cosmic microwave and infrared background radiation (CMBR and CIBR) measurements in the near future have the potential to greatly advance our knowledge of the early universe. New instrument and space technology will soon enable much better measurements of both.

scholarly journals Introductory Remarks

2001 ◽  
Vol 204 ◽  
pp. 5-15
Author(s):  
P. J. E. Peebles
Keyword(s):  
Star Formation ◽  
Background Radiation ◽  
Cosmic Background Radiation ◽  
Morphological Type ◽  
Star Formation History ◽  
Cosmic Background ◽  
Formation History ◽  
Infrared Background

I review the assumptions and observations that motivate the concept of the extragalactic cosmic background radiation, and the issues of energy accounts and star formation history as a function of galaxy morphological type that figure in the interpretation of the measurements of the extragalactic infrared background.

scholarly journals Measurement and Implications of the Cosmic Microwave Background Spectrum

1996 ◽  
Vol 168 ◽  
pp. 17-29
Author(s):  
John C. Mather
Keyword(s):  
Background Radiation ◽  
Far Infrared ◽  
Big Bang ◽  
Scale Invariant ◽  
Background Spectrum ◽  
Nasa Goddard Space ◽  
Wide Range ◽  
Infrared Background ◽  
Microwave Radiometers ◽  
The Big Bang

The Cosmic Background Explorer (COBE) was developed by NASA Goddard Space Flight Center to measure the diffuse infrared and microwave radiation from the early universe. It also measured emission from nearby sources such as the stars, dust, molecules, atoms, ions, and electrons in the Milky Way, and dust and comets in the Solar System. It was launched 18 November 1989 on a Delta rocket, carrying one microwave instrument and two cryogenically cooled infrared instruments. The Far Infrared Absolute Spectrophotometer (FIRAS) mapped the sky at wavelengths from 0.01 to 1 cm, and compared the CMBR to a precise blackbody. The spectrum of the CMBR differs from a blackbody by less than 0.03%. The Differential Microwave Radiometers (DMR) measured the fluctuations in the CMBR originating in the Big Bang, with a total amplitude of 11 parts per million on a 10° scale. These fluctuations are consistent with scale-invariant primordial fluctuations. The Diffuse Infrared Background Experiment (DIRBE) spanned the wavelength range from 1.2 to 240 μm and mapped the sky at a wide range of solar elongation angles to distinguish foreground sources from a possible extragalactic Cosmic Infrared Background Radiation (CIBR). In this paper we summarize the COBE mission and describe the results from the FIRAS instrument. The results from the DMR and DIRBE were described by Smoot and Hauser at this Symposium.

scholarly journals Relaxation leptogenesis, isocurvature perturbations, and the cosmic infrared background

2017 ◽  
Vol 95 (10) ◽  
Author(s):  
Masahiro Kawasaki ◽  
Alexander Kusenko ◽  
Lauren Pearce ◽  
Louis Yang
Keyword(s):  
Infrared Background ◽  
Cosmic Infrared Background ◽  
Isocurvature Perturbations

scholarly journals Anisotropies of the infrared background and primordial galaxies

2006 ◽  
Vol 2 (14) ◽  
pp. 266-266
Author(s):  
Asantha R. Cooray
Keyword(s):  
Galaxy Formation ◽  
Near Infrared ◽  
Imaging Data ◽  
Near Ir ◽  
Infrared Background ◽  
Cosmic Infrared Background ◽  
Galactic Background

AbstractWe discuss anisotropies in the near-IR background between 1 to a few microns. This background is expected to contain a signature of primordial galaxies. We have measured fluctuations of resolved galaxies with Spitzer imaging data and we are developing a rocket-borne instrument (the Cosmic Infrared Background ExpeRiment, or CIBER) to search for signatures of primordial galaxy formation in the cosmic near-infrared extra-galactic background.

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