A5027362521- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Radio Astronomy Observations and Technology
- Astrophysics and Cosmic Phenomena
- Gamma-ray bursts and supernovae
- Gaussian Processes and Bayesian Inference
- Scientific Research and Discoveries
- Geophysics and Gravity Measurements
- Pulsars and Gravitational Waves Research
- Superconducting and THz Device Technology
ETH Zurich
2021-2024
Institute of Particle Physics
2022
The Hydrogen Intensity and Real-time Analysis eXperiment (HIRAX) is a radio interferometer array currently in development, with an initial 256-element to be deployed at the South African Radio Astronomy Observatory (SARAO) Square Kilometer Array (SKA) site Africa. Each of 6m, $f/0.23$ dishes will instrumented dual-polarisation feeds operating over frequency range 400-800 MHz. Through intensity mapping 21 cm emission line neutral hydrogen, HIRAX provide cosmological survey distribution...
Abstract Cosmological neutral hydrogen (HI) surveys provide a promising tomographic probe of the post-reionization era and standard model cosmology. Simulations this signal are crucial for maximizing utility these surveys. We present fast method simulating cosmological distribution HI based on halo approach. Employing approximate PINOCCHIO code, we generate past light cone dark matter halos. Subsequently, halos populated with according to HI-halo mass relation. The nature 21 cm intensity...
Abstract A forward modelling approach provides simple, fast and realistic simulations of galaxy surveys, without a complex underlying model. For this purpose, clustering needs to be simulated accurately, both for the usage as its own probe control systematics. We present model simulate where we extend Ultra-Fast Image Generator include clustering. use distribution functions properties, derived from adjusted observations. This population jointly describes luminosity functions, sizes,...
Abstract Narrow-band imaging surveys allow the study of spectral characteristics galaxies without need performing their spectroscopic follow-up. In this work, we forward-model Physics Accelerating Universe Survey (PAUS) narrow-band data. The aim is to improve constraints on coefficients used create galaxy energy distributions (SED) population model in Tortorelli et al. 2020. that parameters were inferred from Canada-France-Hawaii Telescope Legacy (CFHTLS) data using Approximate Bayesian...
The analysis of cosmological galaxy surveys requires realistic simulations for their interpretation. Forward modelling is a powerful method to simulate clustering without the need an underlying complex model. This approach fast with high resolution and large volume, resolve small dark matter halos associated single galaxies. In this work, we present halo subhalo based on Lagrangian perturbation theory code PINOCCHIO, which generates merger trees. progenitors are extracted from history...
Cosmological neutral hydrogen (HI) surveys provide a promising tomographic probe of the post-reionization era and standard model cosmology. Simulations this signal are crucial for maximizing utility these surveys. We present fast method simulating cosmological distribution HI based on halo approach. Employing approximate $\texttt{PINOCCHIO}$ code, we generate past light cone dark matter halos. Subsequently, halos populated with according to HI-halo mass relation. The nature 21 cm intensity...
A forward modelling approach provides simple, fast and realistic simulations of galaxy surveys, without a complex underlying model. For this purpose, clustering needs to be simulated accurately, both for the usage as its own probe control systematics. We present model simulate where we extend Ultra-Fast Image Generator include clustering. use distribution functions properties, derived from adjusted observations. This population jointly describes luminosity functions, sizes, ellipticities,...
The analysis of cosmological galaxy surveys requires realistic simulations for their interpretation. Forward modelling is a powerful method to simulate clustering without the need an underlying complex model. This approach fast with high resolution and large volume, resolve small dark matter halos associated single galaxies. In this work, we present halo subhalo based on Lagrangian perturbation theory code PINOCCHIO, which generates merger trees. progenitors are extracted from history...