Extended far-ultraviolet emission in distant dwarf galaxies.

Blue compact dwarf (BCD) galaxies are low-luminosity (absolute K-band magnitude, M > -21 mag), metal-poor (1/50 ≤ Z/Z ≤ 1/2, where Z is the metallicity in terms of the solar metallicity Z), centrally concentrated galaxies with bright clumps of star formation. Cosmological surface-brightness dimming and the small size of BCDs limit their detection at high redshifts, making their formation process difficult to observe. Observations of BCDs are needed at intermediate redshifts, where they are still young enough to show their formative stages, particularly in the outer regions where cosmic gas accretion should drive evolution.

S-PLUS: LEnticular Galaxies in Stripe 82 (LEGS82).

This work is a Brazilian-Indian collaboration. It aims at investigating the structural properties of Lenticular galaxies in the Stripe 82 using a combination of S-PLUS (Southern Photometric Local Universe Survey) and SDSS data. S-PLUS is a novel optical multi-wavelength survey which will cover nearly 8000 square degrees of the Southern hemisphere in the next years and the first data release covers the Stripe 82 area.