Speaker
Aleksander Lenart
(Astronomical Observatory, Jagiellonian University in Kraków)
Description
The recent high z measurements of Quasars and Gamma-ray attenuation constrained a matter density parameter $\Omega_M$ at $0.23$ and $0.20$, respectively. Given that the low-z measurements with SNe Ia converge around $\Omega_M=0.3$, a question arises: is there a new tension in cosmology? The community is very early in this investigation, but surprisingly, a long-known model could account for such a phenomenon. The $f(R)$ gravity reconstructs both low and high-distance measurements. I will present an overview of the recent measurements and the $f(R)$ correction derivation. I will compare the traditional $\Lambda CDM$ model with the one obtained for $f(R)$ gravity.
| Field | Physics and Astronomy |
|---|---|
| Length | Quick 10 min |
Author
Aleksander Lenart
(Astronomical Observatory, Jagiellonian University in Kraków)
