The intrinsic shape and dynamical structure of the bulges of lenticular galaxies
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Several scenarios have been proposed to account for the formation and evolution of galactic bulges and to explain the variety of their observed properties. Both the intrinsic shape and dynamical structure of bulges depend on the mechanisms and timescales of their formation. We are deriving the intrinsic axial ratios of the bulges of a sample of unbarred lenticular galaxies to look for a possible relationship with their known orbital structure. Preliminary results show that the orbits of stars of the triaxial bulge of NGC 4476 are more anisotropic than those in the axisymmetric bulge of NGC 4249 hinting at a different formation process.
Costantin , L , Corsini , E M , Mendez Abreu , J , Bontà , E D , Morelli , L & Pizzella , A 2014 , ' The intrinsic shape and dynamical structure of the bulges of lenticular galaxies ' Journal of Physics: Conference Series , vol 566 , no. 1 , 012009 . DOI: 10.1088/1742-6596/566/1/012009
Journal of Physics: Conference Series
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This work was supported by Padua University through grants 60A02-5052/11, 60A02-4807/12, 60A02-5857/13, and CPDA133894. J.M.A. acknowledges support from the European Research Council Starting Grant (SEDmorph; P.I. V. Wild). L.M. received financial support from Padua University grant CPS0204.
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