Constraints on Cosmic Acceleration Using Large-scale Structure Formation

Yong-Seon SONG
2011 Physics and High Technology  
We introduce alternative methods to probe cosmic acceleration by using large-scale structure formation of the universe. A baryon acoustic oscillation (BAO) develops through the tension between the gravitation force and radiative pressure and leaves a peak structure on spectra during the radiation-dominated epoch. The measured peak structure is exploited as a 'standard ruler' to determine angular diameter distance to the targeted galaxy. Constraints on the cosmic acceleration are enhanced by a
more » ... are enhanced by a combination of supernovae and BAO. In addition to the standard ruler method, the integrated Sachs-Wolfe effect (ISW) imprinted on the large-scale structure can be used to probe the signature of cosmic acceleration, which confirms the presence of cosmic acceleration in an alternative way.
doi:10.3938/phit.20.057 fatcat:pspuktxzzbckrmyyd574fox3te