scholarly journals Intensity Fluctuations of the Cosmic Background Radiation Due to Polarization Effects

1990 ◽  
Vol 139 ◽  
pp. 402-403
Author(s):  
Bronislaw Rudak
Keyword(s):  
Background Radiation ◽  
High Redshift ◽  
Cosmic Background Radiation ◽  
Blackbody Radiation ◽  
Polarization Effects ◽  
Cosmic Background ◽  
Intensity Fluctuations

The Nagoya-Berkeley experiment has revealed a substantial excess over the blackbody radiation in the submillimetre part of wavelengths. Its origin is unknown. The concept of high-redshift cosmological dust (e.g., Hayakawa et al., 1987), though not without problems, remains one of the simplest explanations. It is clear that other types of observations will be necessary to identify the source of the excess. Needless to say, searches for cosmic background radiation (CBR) intensity fluctuations on fine angular scales in the submillimetre region are especially desired.

scholarly journals Exponential Growth of Distance between Nearby Rays Due to Multiple Gravitational Lensing

1996 ◽  
Vol 173 ◽  
pp. 93-94
Author(s):  
T. Fukushige ◽  
J. Makino
Keyword(s):  
Ray Tracing ◽  
Gravitational Lensing ◽  
Exponential Growth ◽  
Background Radiation ◽  
High Redshift ◽  
Cosmic Background Radiation ◽  
System Size ◽  
Cosmic Background

We have investigated multiple gravitational lensing by numerical “ray tracing” simulations. We have found that the distance between rays grows exponentially, on average, until it reaches the projected mean separation of lensing objects (∼ RV–1/2, where R is the system size and N is the number of scattering object). This nature may affect observations of high redshift objects or the anisotropy of the cosmic background radiation.

scholarly journals Infrared Dust Emission in Galaxies and Spectral Distortion of Microwave Background

1990 ◽  
Vol 139 ◽  
pp. 394-395
Author(s):  
V. K. Khersonskii ◽  
N. V. Voshchinnikov
Keyword(s):  
Background Radiation ◽  
Dust Emission ◽  
Cosmic Background Radiation ◽  
Blackbody Radiation ◽  
Spectral Distortion ◽  
Microwave Background ◽  
Cosmic Background ◽  
Submillimeter Wavelengths

Recent observations (Matsumoto et al., 1988) indicate that at submillimeter wavelengths the spectrum of the cosmic background radiation (CBR) deviates from that of Planckian blackbody with a temperature T0R = 2.76 K. The relative excess of the flux ζ(v) = [F(v) – F0(v)] / F0(v) (where F(v) and F0(v) are the registered flux and the flux of the blackbody radiation at the frequency of the observations) are 0.6 at a frequency v1 = 380 GHz (λ = 709 μm) and 3.4 at a frequency v2 = 624 GHz (λ = 481 μm).

Beyond FIRST and Planck

2005 ◽  
Vol 201 ◽  
pp. 395-399
Author(s):  
Matt. Griffin
Keyword(s):  
Background Radiation ◽  
High Redshift ◽  
Wavelength Region ◽  
Cosmic Background Radiation ◽  
Detailed Examination ◽  
Energy Scale ◽  
High Redshift Galaxies ◽  
Cosmic Background ◽  
Imaging And Spectroscopy ◽  
Redshift Galaxies

Prospects for future satellite missions, operating in the FIR-mm wavelength region, to study the polarisation of the cosmic background radiation (CBR) and to carry out imaging and spectroscopy of high-redshift galaxies, are discussed. Full characterisation of the CBR polarisation offers the possibility of determining the energy scale of inflation and constraining the form of the inflaton potential. Current technology in FIR imaging and spectroscopy falls well short of matching capabilities in the optical/UV and the mm regions. Filling this gap is important to allow detailed examination of the physics and evolution of high-redshift galaxies, and will be possible with future FIR observatories which are now being studied.

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.

South Pole studies of the anisotropy of the cosmic background radiation at one degree

1990 ◽  
Author(s):  
Peter R. Meinhold ◽  
Philip M. Lubin ◽  
Alfredo O. Chingcuanco ◽  
Jeff A. Schuster ◽  
Michael Seiffert
Keyword(s):  
Background Radiation ◽  
Cosmic Background Radiation ◽  
South Pole ◽  
Cosmic Background
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