Multi-tracer optimal estimators of the power spectrum

• Grant number: 14/17430-0
• Support Opportunities: Scholarships abroad - Research Internship - Master's degree
• Start date: September 22, 2014
• End date: November 21, 2014
• Field of knowledge: Physical Sciences and Mathematics - Astronomy - Extragalactic Astrophysics
• Principal Investigator: Luis Raul Weber Abramo
• Grantee: Lucas Frozza Secco
• Supervisor: Carlos Hernández Monteagudo
• Host Institution: Instituto de Física (IF). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Institution abroad: Centro de Estudios de Física del Cosmos de Aragón (CEFCA), Spain
• Associated to the scholarship: 12/23400-1 - Quasars as tracers of large-scale structure: bias and environments, BP.MS

Abstract

The modern galaxy surveys are now aiming at mapping large numbers of galaxies of different types, quasars and other tracers of large-scale structures. In particular, the instrument J-PAS will detect a huge quantity of galaxies of several types. This feature allows us to explore, in an optimal way, the multi-tracer technique, which has the potential of enhancing dramatically the precision with which we can measure redshift-space distortions and non-Gaussianities.Lucas Secco, the student, has developed a numerical code that extracts the matter power spectrum from any galaxy catalog. The code can deal with catalogs that reproduce realistic situations -- e.g., nontrivial selection functions and window functions. Mr. Secco has already tested his code with several mock (i.e., simulated) catalogs, with remarkable success. Now we want to advance in two fronts: on the one hand his visit to CEFCA will offer him the opportunity to work with Drs. Carlos Hernandez-Monteagudo and Raúl Angulo, who are responsible for building the J-PAS mock catalogs. On the other hand, Mr. Secco will show those researchers how to implement the multi-tracer technique, and how to include those codes in the data analysis pipeline. (AU)