Spatially resolved mock observations of stellar kinematics: full radiative transfer treatment of simulated galaxies ...

• Main Authors: Acevedo, Daniela Barrientos, van der Wel, Arjen, Baes, Maarten, Grand, Robert J. J, Kapoor, Anand Utsav, Camps, Peter, de Graaff, Anna, Straatman, Caroline M. S., Bezanson, Rachel
• Format: Text
• Language: unknown
• Published: arXiv 2023
• Subjects: Astrophysics of Galaxies astro-ph.GA; FOS Physical sciences; sami
• Online Access: https://dx.doi.org/10.48550/arxiv.2306.08040; https://arxiv.org/abs/2306.08040

We present a framework to build realistic mock spectroscopic observations for state-of-the-art hydrodynamical simulations, using high spectral resolution stellar population models and full radiative transfer treatment with SKIRT. As a first application we generate stellar continuum mock observations for the Auriga cosmological zoom simulations emulating integral-field observations from the SAMI Galaxy survey. We perform spectral fitting on our synthetic cubes and compute the resulting rotation velocity ($V_{\rm{rot}}$) and velocity dispersion within 1$R_{\text{e}}$ ($σ_{\text{e}}$) for a sub-set of the Auriga sample. We find that the kinematics produced by Auriga are in good agreement with the observations from the SAMI Galaxy survey after taking into account the effects of dust and the systematics produced by the observation limitations. We also explore the effects of seeing convolution, inclination, and attenuation on the line-of-sight velocity distribution. For highly inclined galaxies, these effects can ... : 17 pages, 11 figures. Accepted for publication in MNRAS ...