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[13.01] Optical and Infrared Properties of Sources Observed by the Two Micron All Sky Survey and the Sloan Digital Sky Survey

Z. Ivezic (Princeton University), J. Loveday (University of Sussex), K. Finlator, G.R. Knapp, M. Strauss, J. Gunn, X. Fan, P. Hall, R. Kim, R. Lupton, K. Menou, V. Narayanan, C. Rockosi, D. Schlegel, I. Strateva (Princeton University), B. Yanny (Fermilab)

We positionally match sources observed by the Sloan Digital Sky Survey (SDSS) to sources observed by the Two Micron All Sky Survey (2MASS) in ~200 deg² of high-latitude sky along the Celestial Equator. There are ~3\times10⁶ SDSS sources and ~2\times10⁵ 2MASS sources in this region. Practically all (~99%) 2MASS sources are matched to an SDSS source within 1 arcsec, and ~12% of them are galaxies resolved in SDSS imaging data. Only ~25% of the optically resolved galaxies are also resolved in 2MASS data.

We discuss the optical and infrared color-color and color-magnitude diagrams for the matched sources and show that stars, galaxies and quasars can be cleanly separated even without morphological information using only the optical-infrared colors. We calculate the K-band luminosity function for galaxies and find it consistent with previous work but with five times smaller error bars.

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

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