After inspecting the gas excitation in the ring using the line ratios diagnostic diagrams and showing that it is ionised by young stars, we determined the gas oxygen abundance using popular strong-line calibration methods. By applying long-slit spectroscopy along the major axis of NGC 4513, we measured gas and star kinematics, Lick indices for the main body of the galaxy, and strong emission-line flux ratios in the ring. Here we study the moderate-luminosity nearby S0 galaxy, NGC 4513. We try to clarify the nature of this phenomenon and its difference from star formation in spiral galaxies. 13, 119234 Moscow, RussiaĮ-mail: Astrophysical Observatory of the Russian Academy of Sciences, Nizhnij Arkhyz 369167, RussiaĮ-mail: Although S0 galaxies are often thought to be “red and dead”, they frequently demonstrate star formation organised in ring structures. Sternberg Astronomical Institute of the Lomonosov Moscow State University, University Av.
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