MOONS is the new Multi-Object Optical and Near-infrared Spectrograph for the Very Large Telescope (VLT) at ESO which will see its first light this year. This remarkable instrument combines, for the first time, the collecting power of an 8-m telescope, 1000 fibres with individual robotic positioners, and both low- and high-resolution simultaneous spectral coverage across the 0.64-1.8 μm...
The QUBRICS (QUasars as BRIght beacons for Cosmology in the Southern hemisphere) survey is designed to produce a sample of the brightest quasars with 𝑧>∼ 2.5, observable with facilities in the Southern Hemisphere, taking advantage of a score of recent and forthcoming databases: Gaia, Skymapper, PAN-STARRS, WISE, Euclid, Rubin etc.
Identifying high-redshift QSOs involves two challenges:...
The latest generation of spectroscopic surveys, such as DESI, Euclid or Subaru-PFS, aims to map the large-scale structure of the Universe with unprecedented accuracy by targeting diverse galaxy populations: luminous red galaxies (LRGs), emission-line galaxies (ELGs), and quasars (QSOs). These sources serve as biased multi-tracers of the underlying dark matter field, and their clustering...
Galaxy clustering analysis relies on precise knowledge of the purity and completeness of cosmological data samples. These properties can be assessed with two approaches: simulations and deeper observations of specific fields.
Simulations provide a controlled environment where the true input is known. However, they come with two major issues: they must be computationally efficient, and they...
To effectively extract cosmological information from
spectroscopic surveys, it is crucial to accurately characterize their
selection function. This is typically achieved through the use of a
random catalog, which serves as a Monte Carlo realization of the
selection function. In this presentation, I will outline the forward
modeling approach utilized in the creation of the random catalog...
