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CGCG 480-022: A distant lonesome merger?

C. Carretero·A. Vazdekis·C. Gonzalez-Garcia·J. E. Beckman·V. Quilis·;
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Abstract

We present a complete analysis, which includes morphology, kinematics, stellar populations and N-body simulations of CGCG 480-022, the most distant (cz=14317 km/s) isolated galaxy studied so far in such detail. The results all support the hypothesis that this galaxy has suffered a major merger event with a companion of ~0.1 times its mass. Morphology reveals the presence of a circumnuclear ring and possibly further ring debris. The radial velocity curve looks symmetrical, whilst the velocity dispersion increases with radius reaching values that do not correspond to a virialized system. Moreover, this galaxy deviates significantly from the Fundamental Plane and the Faber-Jackson relation. The stellar population analysis show that the ring is younger and more metal-rich, which suggest that it has undergone a fairly recent burst of star formation. Both morphological and dynamical results are in broad agreeement with our N-body simulations.

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C. Carretero, A. Vazdekis, C. Gonzalez-Garcia, J. E. Beckman, V. Quilis, ;. 2006-08-01. CGCG 480-022: A distant lonesome merger?. https://doi.org/10.1086/508021

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