Observing the Universe at millimetre wavelengths

Galaxy catalog from SAGE calibration using the hydrodynamic simulation The300

28 juin 2023, 15:20

20m

Amphitheatre (LPSC Grenoble)

Wednesday P1

Orateur

Jonathan Gómez (Universidad Autónoma de Madrid)

Description

The Three Hundreds project consists of a 324 regions sample simulated with full-physics hydrodynamical re-simulations. They have been produced starting from the dark-matter-only MultiDark Simulations [MDPL2 8], which consists in a 1 h${}^{-1}$ Gpc cube containing 3840${}^3$ dark matter (DM) particles with a mass of $1.5\times {10}^9$ h${}^{-1}$ M${}_{\odot }$ each (LR DMONLY). This produces 324 Full-physics hydrodynamics zoom simulations at low resolution (LR HYDRO). With this resolution it is not possible to access a good enough comparison of magnitudes/luminosities between the simulated galaxies with the observation from Euclid for example. For this reason 324 Dark-matter-only simulations at high resolution (HR DMONLY) were generated. With respect to LR DMONLY, it has twice particles per dimension, thus, 7680${}^3$, with eight times less mass per particle i.e., $1.8\times {10}^8$ h${}^{-1}$ M${}_{\odot }$ each. Thanks to this we generated catalogs of galaxies from the SAGE Semi-Analytical Model of galaxy formation using the new HR DMONLY merger trees. To obtain catalogs consistent with a hydrodynamic simulation, the internal physical parameters of SAGE were calibrated with the Particle swarm optimization (PSO) calibrator using clusters with M${}_{star}={10}^{14}$ h${}^{-1}$ M${}_{\odot }$ from 5 regions of full-physics hydrodynamics zoom simulations at high resolution (HR HYDRO) as HR DMONLY. This calibration was carried out by comparing the cumulative stellar mass function and cumulative luminosity functions from different bands of SAGE with HR HYDRO at $z=0$. With this calibration, we generate catalogs of galactic properties for the 324 regions in high resolution at 3 different redshifts: $z=0$, $z=0.5$ and $z=1$ which we can compare the new luminosities with observations.

Documents de présentation

mm Universe 2023 - Grenoble.pdf