wewanttofindthecosmologicalconstantinfluenceoncosmicmicrowavebackground(cmb)temperatureduetomovinglinearcosmicstrings.usingthespace-timemetricofalinearcosmicstringinanacceleratedexpandinguniverse,thegott-kaiser stebbins(gks)effect,asanimportantmechanisminproducingtemperaturediscontinuityinthe(cmb),isconsidered;then,itsmodificationduetotheeffectofthecosmologicalconstantiscalculated.theresultshowsthat...

In innation cosmologies, cosmic structure develops through the gravitational instability of the inevitable quantum noise in primordial scalar elds. I show how the acceleration of the universe deenes the shape of the primordial spectrum of gravitational metric and scalar eld uctuations. I assess how we can determine the shape and overall amplitude over the ve decades or so of spatial wavelengths...

The CMB radiation is completely characterized by its temperature anisotropy and polarization in each direction in the sky. Today, studies of the temperature anisotropies in the CMB have provided strong constraints on many of the cosmological parameters. However, for precision cosmology we still need to consider the polarization information of the CMB to break some of the degenerecies that exist...

It is shown that a collection of photons with nearly the same frequency exhibits a Bose ”condensation” type of phenomenon at about 3K corresponding to a peak intensity at a wave length of about 0.4cm. This could give a mechanism for the observed Cosmic Background Radiation, and also explain some curious features. It is a curious circumstance that the substitution of the cosmic microwave backgro...

The multiscaling features of structure functions of cosmic microwave background (CMB) radiation have been studied using the new data available with the resolution of the order of a degree (combined QMAP and Saskatoon CMB radiation maps). It is shown that the scaling exponents of the CMB structure functions in the angular scale interval 0.9–4◦ are nearly identical to those of universal velocity ...

It is shown that a collection of photons with nearly the same frequency exhibits a ”condensation” type of phenomenon corresponding to a peak intensity. The observed cosmic background radiation can be explained from this standpoint in terms of the radiation due to fluctuations in interstellar Hydrogen. In a previous communication[1] it was suggested that the origin of the Cosmic Background Radia...

I describe our post-COBE theories for how structure developed in the Universe, from the ultra-large scales beyond that httle bit of the Universe accessible to our observations to ‘short-distance’ scales where gaa dynamicrd processes will have been m importmt m gravity in shaping the high redshift objects that formed. In between lie the very large scales whose gravitationrd potential fluctuation...

The observed cosmic microwave background (CMB) radiation provides strong evidence for the hot big bang. The success of primordial nucleosynthesis calculations (see Sec. 16, " Big-bang nucleosynthesis ") requires a cosmic background radiation (CBR) characterized by a temperature kT ∼ 1 MeV at a redshift of z 10 9. In their pioneering work, Gamow, Alpher, and Herman [1] realized this and predicte...