Context: Evolution of galaxies through cosmic time has been widely studied at high redshift, but there are a few studies in this field at lower redshifts. However, low-redshifts studies will provide important clues to the evolution of galaxies, furnishing the required link between local and high-redshift universe. Aims: In this work we focus on the

The presence of surface convection in K-type dwarfs is revealed in very high quality spectra of nine bright stars. The observed asymmetries and wavelength shifts of the Fe I absorption line profiles are mainly due to granulation. The bisectors of the strongest Fe I lines have a span of about 100 m/s and the central wavelengths of the weakest Fe I

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Context: The galaxy number counts has been traditionally used to test models of galaxy evolution. However, the origin of significant differences in the shape of number counts at different wavelengths is still unclear. By relating the most remarkable features in the number counts with the underlying galaxy population it is possible to introduce