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J-PAS : Mapping the Universe with 56 narrow-band optical filters

Carlos López San Juan

The new-generation, large area photometric and spectroscopic surveys will revolutionise our understanding about galaxy formation and evolution. One of the most ambitious of such surveys is the Javalambre - Physics of the accelerating universe Astrophysical Survey (J-PAS), that will map ~ 8500deg² of the northern sky with 56 narrow-band (~140A) optical filters. J-PAS is half-way the 5-6 broadband photometric surveys (SDSS, DES, LSST) and the spectroscopic surveys (BOSS, eBOSS, Euclid), providing low-resolution (R ~ 50) spectra for every observed pixel with r < 23 (AB) and reaching a photometric redshift precision of ~1000 km/s, similar to slit-less spectroscopy. In the first part of the seminar, I will present a summary and the current status of J-PAS. In the second part, I will focus in the challenges and technical innovations needed to extract the most of multi-filter surveys, such as ALHAMBRA and J-PAS, focusing in the unbiased and robust estimation of the luminosity function from magnitude and redshift probability distribution functions (PDFs).

2015 October 20, 15:00

Observatório Astronómico de Lisboa (Seminar room)
Tapada da Ajuda, 1349-018 Lisboa

Faculdade de Ciências da Universidade de Lisboa Universidade do Porto Faculdade de Ciências e Tecnologia da Universidade de Coimbra
Fundação para a Ciência e a Tecnologia COMPETE 2020 PORTUGAL 2020 União Europeia