Numeric Spectrum of Relic Gravitational Waves in Accelerating Universe

Details Numeric Spectrum of Relic Gravitational Waves in Accelerating Universe Numeric Spectrum of Relic Gravitational Waves in Accelerating Universe

2005-05-30

arxiv.org/abs/astro-ph/0505589v3

Chin.Phys.Lett.20:1817,2005

Astronomy and Astrophysics

Astrophysics

7 pages, 4 figures, minor typos corrected

Scientific paper

10.1088/0256-307X/22/7/071

The accelerating expansion of the Universe at the present stage is a process that will change the spectrum of relic gravitational waves. Here we present a numerical calculation for the power spectrum of relic gravitational waves in the accelerating Universe. The results show that although the overall features of the power spectrum is similar to that in the non-accelerating models, the amplitude is smaller by an order of $10^{-1}$. We also find that the spectrum is very sensitive to the index $\beta$ of the inflationary expansion with the scale factor $a(\tau) \propto |\tau|^{1+\beta}$. With increase of $\beta$, the resulting spectrum is tilted to be flatter with more power on high frequencies, and the sensitivity of the second science run of the LIGO detectors puts a restriction on the parameter $\beta < -1.8$. The influence of reheating following the inflation has been examined.

Affiliated with

Also associated with

No associations

Rating

Numeric Spectrum of Relic Gravitational Waves in Accelerating Universe does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Numeric Spectrum of Relic Gravitational Waves in Accelerating Universe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Numeric Spectrum of Relic Gravitational Waves in Accelerating Universe will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-315268