Diego Saez-Gomez
Diego Saez-Gomez
Diego Saez-Gomez
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
0.8<br />
1.006<br />
1.0<br />
Cosmological evolution<br />
in viable f(R)<br />
1.0 0.5 0.0 0.5 1.0<br />
Hu-Sawicki and Nojiri-Odintsov model<br />
z<br />
(a)<br />
1.00 0.95 0.90 0.85 0.80<br />
Figure 1: Evolution of the EoS parameter (12) as a function of the redshift z for the models F HS (R)<br />
and F NO (R). Herewehaveassumedtheinitialconditionsh(0) = 1 and h<br />
2. Phantom initial conditions<br />
(0) = 0.4, accordingto(14).<br />
The panel 1a shows the evolution from the past to the future, where the phantom barrier is crossed for<br />
negative redshifts in EoS both parameter models. The panel 1b shows in more detail the range −1