S319p.213 — Using narrow-band J-PAS photometry to assess the properties of the stellar population in galaxies

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Aug 10th at 6:00 PM until 6:00 PM

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Author(s): Gustavo Bruzual2, Alfredo Mejia-Narvaez1, Gladis Magris C.1

Institution(s): 1. CIDA, 2. CRyA, UNAM

We study the uncertainties and biases on the properties of the stellar population content of galaxies retrieved from narrow-band (J-PAS) photometry using the non-parametric method of spectral fitting dubbed DynBaS. We construct a star formation history library à la Chen et al. (2012), and then SED-fit a selection of synthetic spectra with observational properties similar to SDSS galaxies. We confront the results obtained from the photometric fits to those obtained from spectroscopic data for synthetic and real galaxies at various redshift ranges. Since no assumption on the star formation history is made, the so called template mismatch biases are naturally overcome. We find that biases in our estimations are the consequence of the several degeneracies between mass, age, metallicity, and internal dust extinction present in galaxy properties.