Bibcode
DOI
Carretero, C.; Vazdekis, A.; González-García, A. C.; Beckman, J. E.; Quilis, V.
Bibliographical reference
The Astrophysical Journal, Volume 648, Issue 2, pp. L115-L118.
Advertised on:
9
2006
Journal
Citations
2
Refereed citations
1
Description
We present a complete analysis, which includes morphology, kinematics,
stellar populations, and N-body simulations, of CGCG 480-022, the most
distant (cz=14,317 km s-1) 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, while
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
agreement with our N-body simulations.