Bibcode
DOI
La Barbera, F.; Busarello, G.; Merluzzi, P.; de la Rosa, I. G.; Coppola, G.; Haines, C. P.
Referencia bibliográfica
The Astrophysical Journal, Volume 689, Issue 2, pp. 913-918.
Advertised on:
12
2008
Revista
Número de citas
39
Número de citas referidas
33
Descripción
We derive the fundamental plane (FP) relation for a sample of 1430
early-type galaxies in the optical (r band) and the near-infrared (K
band), by combining SDSS and UKIDSS data. With such a large, homogeneous
data set, we are able to assess the dependence of the FP on the wave
band. Our analysis indicates that the FP of luminous early-type galaxies
is essentially wave band-independent, with its coefficients increasing
at most by 8% from the optical to the NIR. This finding fits well into a
consistent picture in which the tilt of the FP is not driven by stellar
populations but results from other effects, such as nonhomology. In this
framework, the optical and NIR FPs require more massive galaxies to be
slightly more metal-rich than less massive ones, and to have highly
synchronized ages, with an age variation per decade in mass smaller than
a few percent.
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