Astronomy & Astrophysics manuscript no. paper7 c ESO 2020 January 23, 2020 Searching for star-forming galaxies in the Fornax and Hydra clusters ? O. Vaduvescu1;2, C. Kehrig3, J. M. Vilchez4, and E. Unda-Sanzana2 1 Isaac Newton Group of Telescopes, Apto. 321, E-38700 Santa Cruz de la Palma, Canary Islands, Spain e-mail:
[email protected] 2 Instituto de Astronom´ıa, Universidad Catolica´ del Norte, Avenida Angamos 0610, Antofagasta, Chile 3 Leibniz-Institut fur Astrophysik Postdam, innoFSPECPostdam, An der Sternwarte16, 14482 Postdam, Germany 4 Instituto de Astrof´ısica de Andaluc´ıa (CSIC), Apto. 3004, 18080, Granada, Spain Astronomy and Astrophysics 533, A65 (2011) ABSTRACT Context. The formation and evolution of dwarf galaxies is relatively difficult to understand because of their faint emission in all regimes that require large aperture telescopes. Aims. We intend to study the evolution of star forming dwarf galaxies in clusters. We selected Fornax and Hydra clusters to com- plement our previous study of Virgo. On the basis of available literature data, we selected ten star-forming candidates in Fornax and another ten objects in Hydra. Methods. We used Gemini South with GMOS to acquire Hα images necessary to detect star-forming regions in the two galaxy samples. We then performed long-slit spectroscopy for the brightest six candidates, to derive their chemical properties. Finally, we employed the VLT with HAWK-I to observe all galaxies in the K0 band to derive their main physical properties. Results. We studied the morphology of our two samples, finding five objects in Fornax and six in Hydra with structures consistent with those of star-forming dwarfs, i.e., dwarf irregulars (dIs) or blue compact dwarfs (BCDs).