AAS 201st Meeting, January, 2003
Session 13. Galaxy - Structure
Poster, Monday, January 6, 2003, 9:20am-6:30pm, Exhibit Hall AB

[Previous] | [Session 13] | [Next]

[13.13U] Galaxy classification by shapelet decomposition in the SDSS Early Data Release

B. C. Kelly, T. A. McKay (University of Michigan)

We describe application of the 'shapelet' linear decomposition of galaxy images to data from the Sloan Digital Sky Survey Early Data Release. Shapelets are a set of orthonormal functions which also happen to be eigenstates of the 2D quantum harmonic oscillator. Because they form a complete set, they allow us to quantify galaxy morphology in a model independent way. We compare shapelet decompositions to traditional Hubble classifications for a sample of ~ 1450 well resolved SDSS galaxies, describing the relationship between location in shapelet space and Hubble type. In addition to decomposing the galaxy images in a single band, we also decompose images in the colors u-g, g-r, and r-i. This morphology of color provides significant additional classification information.

Funding for the creation and distribution of the SDSS Archive has been provided by the Alfred P. Sloan Foundation, the Participating Institutions, the National Aeronautics and Space Administration, the National Science Foundation, the U.S. Department of Energy, the Japanese Monbukagakusho, and the Max Planck Society. The SDSS Web site is http://www.sdss.org/.

The SDSS is managed by the Astrophysical Research Consortium (ARC) for the Participating Institutions. The Participating Institutions are The University of Chicago, Fermilab, the Institute for Advanced Study, the Japan Participation Group, The Johns Hopkins University, Los Alamos National Laboratory, the Max-Planck-Institute for Astronomy (MPIA), the Max-Planck-Institute for Astrophysics (MPA), New Mexico State University, University of Pittsburgh, Princeton University, the United States Naval Observatory, and the University of Washington.

The author(s) of this abstract have provided an email address for comments about the abstract: bckelly@umich.edu

[Previous] | [Session 13] | [Next]

Bulletin of the American Astronomical Society, 34, #4
© 2002. The American Astronomical Soceity.