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New southern blue compact dwarf galaxies in the 2dF Galaxy Redshift Survey
P. Papaderos, N. G. Guseva, Y. I. Izotov +3
Aiming to find new extremely metal-deficient star-forming galaxies we extracted from the Two-Degree Field Galaxy Redshift Survey (2dFGRS) 100K Data Release 14 emission-line galaxie…
Oxygen abundance variations in the system of the two blue compact dwarf galaxies SBS 0335-052E and SBS 0335-052W
P. Papaderos, Y. I. Izotov, N. G. Guseva +2
We present 3.6m ESO telescope spectroscopic observations of the system of the two blue compact dwarf galaxies SBS 0335-052W and SBS 0335-052E. The oxygen abundance in SBS 0335-052W…
Two extremely metal-poor emission-line galaxies in the Sloan Digital Sky Survey
Y. I. Izotov, P. Papaderos, N. G. Guseva +2
We present spectroscopic observations with the 3.6m ESO telescope of two emission-line galaxies, J2104-0035 and J0113+0052, selected from the Data Release 4 (DR4) of the Sloan Digi…
Star Cluster Analyses from Multi-Band Photometry: the Key Advantage of SALT's U-band Sensitivity
Uta Fritze - v. Alvensleben, Polychronis Papaderos, Peter Anders +3
Conventionally, CMD analyses of nearby star clusters are based on observations in 2 passbands. They are plagued by considerable degeneracies between age, metallicity, distance (and…