Nearby merging pairs are unique laboratories in which one can study the gravitational effects on the individual interacting components .
In this manuscript , we report the characterization of selected H ii regions along the peculiar galaxy NGC 2936 , member of the galaxy pair Arp 142 , an E+S interaction , known as “ The Penguin ” .
Using Gemini South spectroscopy we have derived a high enhancement of the global star formation rate SFR = 35.9 M _ { \odot } yr ^ { -1 } probably stimulated by the interaction .
Star-forming regions on this galaxy display oxygen abundances that are consistent with solar metallicities .
The current data set does not allow us to conclude any clear scenario for NGC 2936 .
Diagnostic diagrams suggest that the central region of NGC 2936 is ionized by AGN activity and the eastern tidal plume in NGC 2936 is experiencing a burst of star formation , which may be triggered by the gas compression due to the interaction event with its elliptical companion galaxy : NGC 2937 .
The ionization mechanism of these sources is consistent with shock models of low-velocities of 200-300 km s ^ { -1 } .
The isophotal analysis shows tidal features on NGC 2937 : at inner radii non-concentric ( or off-centering ) isophotes , and at large radii , a faint excess of the surface brightness profile with respect to de Vaucouleurs law .
By comparing the radial velocity profiles and morphological characteristics of Arp 142 with a library of numerical simulations , we conclude that the current stage of the system would be about 50 \pm 25 Myr after the first pericenter passage .