Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006rmxac..26r.191g&link_type=abstract
XI IAU Regional Latin American Meeting of Astronomy (Eds. L. Infante & M. Rubio) Revista Mexicana de Astronomía y Astrofísica (S
Astronomy and Astrophysics
Astronomy
Scientific paper
We present a partial sample of M 51 type galaxies, some of them, in an advanced degree of the interaction, like the systems VV 410 and AM 0459-340, with a long tidal tail extending from the main galaxy to the satellite galaxy. In some of the systems, for example VV 410 and AM 0459-340, is observed an enhancement of the star-formation activity in both galaxies. In VV 410, the starburst is placed mainy at the ends of the main galaxy bar, and in AM 0459-340 we observe peaks in the H α emission in the nuclear region and in the notorious emission region of the southern arm, being the star-formation activity from moderate to intense in their satellite galaxies. In NGC 341 the starburst is seen only in the satellite galaxy. We determined oxygen abundances distributions along the bar of the main galaxies, being this distribution flatter than those obtained from barred isolated starburst galaxies. In some cases the abundances from the external parts of the main galaxies are similar to those which were found for the satellite galaxies, so we do not discard the possibility of material circulation. The radial velocity distributions through the major axis of the main and satellite galaxies are disturbed in some systems, like in AM 0459-340 and VV 410, while in others these distributions do not show clear assymetries or perturbations, like in AM 2256-304 and AM 0639-582. Two interesting systems, have extreme velocity differences between both galaxies, of about 1200 km/s for NGC 151 and 1400 km/s for AM 2256-304.
Aguero Estela L.
Diaz Ruben J.
Gunthardt G. I.
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