Portraying the missing baryonic mass at the cosmic noon: the contribution of CUBES
Journal
Date Issued
2023
Author(s)
Abstract
The cosmological and galactic missing baryon problems are briefly reviewed with a particular focus on the contributions to the baryonic census derived from the analysis of quasar absorption spectra. The CUBES spectrograph foreseen for the ESO VLT, with its exceptional efficiency (> 40 %), blue wavelength coverage (λ≃ 300 - 405 nm) and intermediate resolution (R≃ 24 , 000) will allow us to tackle this issue with two approaches: using H i Lyman-α lines at z≃ 1.5 - 2.3 , just after the peak of star formation, and using O vi absorbers at z≃ 1.9 - 2.9 , at the cosmic noon. In both cases, in order to derive the baryonic masses it will be necessary to acquire also higher-resolution spectra of the same target quasars to cover the region at longer wavelengths. We simulate the observations with the CUBES E2E simulator considering a sample of 40 bright quasars at redshifts zem∼ 2 - 3 observed for a total time of ∼ 13 h to reach a signal-to-noise ratio of ∼ 15 in the H i Lyman-α, O vi forests.
Volume
55
Issue
1
Start page
209
Issn Identifier
0922-6435
Rights
open.access
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