Speaker
Description
The large-scale distribution of galaxies contains crucial information about the acoustic waves that propagated in the primordial baryon-photon plasma. These waves imprint a characteristic scale into the galaxy two-point correlation function. This scale, called the "Linear Point" (LP), is defined as the mid-point between the peak and dip of the correlation function at scales of about 150 Mpc.
In this talk, I will explain that the Linear Point is a cosmological standard ruler that enables us to measure cosmic distances without the need to model the impact of non-linearities on the clustering correlation function. In turn, these measurements will allow us to investigate the cosmological expansion history.
Finally, we will focus on our current research in the context of the Euclid mission. We are investigating the accuracy and the expected precision of the Linear Point measurements on mock catalogs (dark matter particles, halos and galaxies), based on the mission's characteristics. This preparatory work is a necessary step to estimate cosmic distances exploiting the Linear Point with Euclid data.
| Abstract Category | Astrophysics & Cosmology |
|---|
