S E M I N A R I

Departament d'Astronomia i Astrofísica
Universitat de València

    SHARDS: a GTC Ultra-deep Spectro-photometric Survey of Distant Galaxies

Antonio Cava

Departamento de Astrofísica, Universidad Complutense de Madrid


Seminari del departament d'Astronomia i Astrofísica

Dimecres 22 maig 2013

15:00


Resum

In this talk I will introduce the SHARDS (Survey for High-z Absorption Red & Dead Sources; Perez-Gonzalez P.G., Cava A., Barro G. et al. 2013) project, an unbiased ultra-deep spectro-photometric survey with OSIRIS@GTC aimed at selecting and studying massive passively evolving galaxies at z=1.0-2.3 using a set of 24 medium-band filters (FWHM ~17 nm) at 500-950 nm in GOODS-N. Our observing strategy is optimized to detect at z>1 the prominent MgUV absorption feature at rest-frame ~280 nm, a distinctive, necessary, and sufficient feature of evolved stellar populations. Nonetheless, the data quality allow a plethora of studies on galaxy populations, including Emission Lines Galaxies (ELGs) about which we have started one of our first science verification projects. The ?rst analysis of ELGs in SHARDS, demonstrate the huge capability of this survey in providing physical information for a large sample of emitters, spanning from local H_alpha to high-z Lyman-alpha emitters.