@Article{RosaRodKraMilCar:2021:PhPrEv,
               author = "Rosa, D. A. and Rodrigues, I. and Krabbe, A. C. and Milone, 
                         Andr{\'e} de Castro and Carvalho, S.",
          affiliation = "{Universidade do Vale do Para{\'{\i}}ba (UNIVAP)} and 
                         {Universidade do Vale do Para{\'{\i}}ba (UNIVAP)} and 
                         {Universidade do Vale do Para{\'{\i}}ba (UNIVAP)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Universidade do Vale 
                         do Para{\'{\i}}ba (UNIVAP)}",
                title = "The physical properties and evolution of the interacting system AM 
                         1204-292",
              journal = "Monthly Notices of the Royal Astronomical Society",
                 year = "2021",
               volume = "501",
               number = "3",
                pages = "3750--3766",
                month = "Mar.",
             abstract = "We investigate interaction effects in the stellar and gas 
                         kinematics, stellar population, and ionized gas properties of the 
                         interacting galaxy pair AM 1204-292,composed of NGC 4105 and NGC 
                         4106. The data consist of long-slit spectra in the range 3000-7050 
                         Å. The massive E3 galaxy NGC 4105 presents a flat stellar velocity 
                         profile, while the ionized gas is in strong rotation, suggesting 
                         an external origin. Its companion, NGC 4106, shows asymmetries in 
                         the radial velocity field, likely due to the interaction. The 
                         dynamics of the interacting pair were modelled using the P-Gadget3 
                         treepm/sph code, from which we show that the system has just 
                         passed the first perigalacticum, which triggered an outbreak of 
                         star formation, currently at full maximum. We characterized the 
                         stellar population properties using the stellar population 
                         synthesis code starlight and, on average, both galaxies are 
                         predominantly composed of old stellar populations. NGC 4105 has a 
                         slightly negative age gradient, comparable with that of the most 
                         massive elliptical galaxies, but a steeper metallicity gradient. 
                         The SB0 galaxy NGC 4106 presents smaller radial variations in both 
                         age and metallicity in comparison with intermediate-mass 
                         early-type galaxies. These gradients have not been disturbed by 
                         interaction, since the star formation happened very recently and 
                         was not extensive in mass. Electron density estimates for the pair 
                         are systematically higher than those obtained in isolated 
                         galaxies. The central O/H abundances were obtained from 
                         photoionization models in combination with emission-line ratios, 
                         which resulted in 12 + log(O/H) = 9.03 ± 0.02 and 12 + log(O/H) = 
                         8.69 ± 0.05 for NGC 4105 and NGC 4106, respectively.",
                  doi = "10.1093/mnras/staa3850",
                  url = "http://dx.doi.org/10.1093/mnras/staa3850",
                 issn = "0035-8711 and 1365-2966",
             language = "en",
           targetfile = "rosa_physical.pdf",
        urlaccessdate = "20 maio 2024"
}