New optical and HI-line observations of NGC 5719, an almost edge-on, nearby Sab galaxy with a prominent skewed dust lane, show clear signatures of its recent interaction with its face-on Sbc companion NGC 5713. In particular, two massive, counter-rotating co-spatial stellar discs were found in NGC 5719. Concerning the outer regions of the galaxy, the HI bridge that connects the two galaxies is quite bright in GALEX ultraviolet images, as a result of the conversion into stars of the gaseous component, looking in the inner regions, we find that the ionized gas shares the same kinematics of the HI disk and of the counterrotating stellar components. Summarizing, we are looking to a counterrotating system on the act of getting shape.
NGC 5719/13: interacting spirals forming a counter-rotating stellar disc
PIZZELLA, ALESSANDRO
;CORSINI, ENRICO MARIA;BERTOLA, FRANCESCO;
2005
Abstract
New optical and HI-line observations of NGC 5719, an almost edge-on, nearby Sab galaxy with a prominent skewed dust lane, show clear signatures of its recent interaction with its face-on Sbc companion NGC 5713. In particular, two massive, counter-rotating co-spatial stellar discs were found in NGC 5719. Concerning the outer regions of the galaxy, the HI bridge that connects the two galaxies is quite bright in GALEX ultraviolet images, as a result of the conversion into stars of the gaseous component, looking in the inner regions, we find that the ionized gas shares the same kinematics of the HI disk and of the counterrotating stellar components. Summarizing, we are looking to a counterrotating system on the act of getting shape.Pubblicazioni consigliate
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