The SDSS-UKIDSS Fundamental Plane of Early-Type Galaxies

Bibcode
2008ApJ...689..913L
DOI
10.1086/592769
La Barbera, F.; Busarello, G.; Merluzzi, P.; de la Rosa, I. G.; Coppola, G.; Haines, C. P.
Bibliographical reference

The Astrophysical Journal, Volume 689, Issue 2, pp. 913-918.

Advertised on:
12
2008
Journal
The Astrophysical Journal
Number of authors
6
IAC number of authors
1
Citations
39
Refereed citations
33
Description
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.
Related projects
Group members
Traces of Galaxy Formation: Stellar populations, Dynamics and Morphology

We are a large, diverse, and very active research group aiming to provide a comprehensive picture for the formation of galaxies in the Universe. Rooted in detailed stellar population analysis, we are constantly exploring and developing new tools and ideas to understand how galaxies came to be what we now observe.

Ignacio
Martín Navarro
In progress
Type
Refereed
Galaxies

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