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RESEARCH PRODUCT
CGCG 480-022: A Distant Lonesome Merger?
C. CarreteroJohn E. BeckmanA. VazdekisA. C. González-garcíaVicent Quilissubject
Stellar populationFOS: Physical sciencesAstrophysics::Cosmology and Extragalactic AstrophysicsAstrophysicsKinematicsAstrophysicsabundances [galaxies]kinematics and dynamics [galaxies]galaxies: interactionsgalaxies: kinematics and dynamicsAstrophysics::Galaxy AstrophysicsPhysicsgalaxies: individual (CGCG 480 022)interactions [galaxies]Instituto de Ciencias del PatrimonioStar formationAstrophysics (astro-ph)Velocity dispersionAstronomy and Astrophysicsindividual (CGCG 480 022) [galaxies]GalaxyInstitute of Heritage SciencesRadial velocitySpace and Planetary ScienceIncipitstructure [galaxies]galaxies: structuregalaxies: abundancesAstrophysics::Earth and Planetary AstrophysicsFundamental plane (elliptical galaxies)n-body simulations [methods]methods: n-body simulationsdescription
[EN]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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2006-08-01 | The Astrophysical Journal |