Mathematics – Logic
Scientific paper
May 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009rmxac..35..310k&link_type=abstract
XII Latin American IAU Regional Meeting (Eds. G. Magris, G. Bruzual, & L. Carigi) Revista Mexicana de Astronomía y Astrofísica (
Mathematics
Logic
Scientific paper
We present the spectroscopic study of the interacting galaxies AM 2306-721, to obtain a more comprehensive picture of the effects of the interaction in the kinematics, stellar population characteristics and oxygen abundances of these galaxies. Optical spectroscopy in the range 3700-7200 was obtained with the Gemini Multi-Object Spectrograph at Gemini South for both galaxies, at different position angles. The gas kinematics and morphological information were used as constraints for numerical N-body simulations of the encounter, which predict that the situation that best reproduces the morphology and kinematics of AM 2306-721 system at the current stage is about 250 Myr after perigalacticum. We estimate a dynamical mass of M(R)=1.29×10^11~M_&sun; within a radius of 18 kpc for the main galaxy and M(R)=8.56×10^10~M_odot within a radius of 10.7 kpc for the secondary galaxy. The disk of the main galaxy shows a clear radial oxygen abundance gradient, which is typical of spiral galaxies. The effects of the interaction were more clearly seen in the companion galaxy, which besides the morphological distortions show enhanced star-formation and smooth [O/H].
Ferreiro D. L.
Krabbe Angela C.
Pastoriza Miriani Griselda
Rodrigues Irapuan
Winge Claudia
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