| Texto completo | |
| Autor(es): |
Mergulhao, Thiago
;
Rubira, Henrique
;
Voivodic, Rodrigo
;
Raul Abramo, L.
Número total de Autores: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Journal of Cosmology and Astroparticle Physics; v. N/A, n. 4, p. 34-pg., 2022-04-01. |
| Resumo | |
We study the performance of the perturbative bias expansion when combined with the multi-tracer technique, and their impact on the extraction of cosmological parameters. We consider two populations of tracers of large-scale structure and perform a series of Markov chain Monte Carlo analysis for those two tracers separately. The constraints in omega(cdm) and h using multi-tracer are less biased and approximately 60% better than those obtained for a single tracer. The multi-tracer approach also provides stronger constraints on the bias expansion parameters, breaking degeneracies between them and with their error being typically half of the single-tracer case. Finally, we studied the impacts caused in parameter extraction when including a correlation between the stochastic field of distinct tracers. We also include a study with galaxies showing that multi-tracer still lead to substantial gains in the cosmological parameters. (AU) | |
| Processo FAPESP: | 16/19647-2 - Vinculando teorias modificadas de gravitação utilizando propriedades de voids |
| Beneficiário: | Rodrigo Voivodic |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |
| Processo FAPESP: | 19/26492-3 - Ciência com o telescópio robótico brasileiro |
| Beneficiário: | Claudia Lucia Mendes de Oliveira |
| Modalidade de apoio: | Auxílio à Pesquisa - Projetos Especiais |