A study of Minor Merger Galaxy, AM 2306-721: kinematics, physical properties, formation and evolution of galaxies

KRABBE, A. C.; PASTORIZA, M. G.; WINGE, C.; RODRIGUES, I; FERREIRO, D. L.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY

Blackwell Publishing

Lugar: London; Año: 2008 vol. 389 p. 1593 - 1604

0035-8711

In this work we present a study of the cinematic of the minor merger AM2322-821, we  analized its physical properties and we studied the formation and the evolution in each one components of the pair.  The current paper is based on long slit spectrophotometric data obtained with the Gemini Multi-Object Spectrograph attached to the Gemini South Telescope.  The radial velocity was estimated  from the emission lines present in the spectra.  The rotation curves along to the major and minor axes of both galaxies. The estimated dynamical mass was derived by assuming that the observed velocity gradient has a purely rotational origin.  The mass inside a certain radius is given by  M(R)=Rv^(2)/G. In order to reconstruct the history of AM,2306-721 and to predict its evolution we reproduce the interaction between AM2306A and AM2306B running a series ofN-body simulations carried out with the N-body/SPH codeGADGET-2. The components of stellar population estimated  in each galaxy were subtracted from each  spectrum in order to investigate the physical properties of the gas in these galaxies. We determined the spatial variation of the stellar population in AM2306A and AM2306B. These estimates had been carried through of all apertures along the major axis of each galaxy,  with enough measured Wl that allow us to perform a reliable stellar population synthesis.