Poster Presentation Astronomical Society of Australia Annual Scientific Meeting including HWWS 2013

Galaxy spectral energy distributions from the ultraviolet to the mid-infrared (#209)

Michael Brown 1
  1. Monash University, Clayton, VIC, Australia

We present an atlas of 120 spectral energy distributions for nearby galaxies, with wavelength coverage spanning from the UV to the mid-infrared. We combined ground-based optical spectrophotometry with infrared spectroscopy from Spitzer and Akari, with gaps in spectral coverage being filled using MAGPHYS models. The spectroscopy and models were normalised, constrained and verified using matched aperture photometry measured using imagery from Swift, GALEX, SDSS, 2MASS, Spitzer and WISE. The availability of 27 photometric bands allowed us to identify and mitigate systematic errors present in the data, including an error in the WISE W4 filter curve. Comparison of our spectral energy distributions with other template libraries and the observed colors of galaxies indicates that we have smaller systematic errors than existing atlases while spanning a broader range of galaxy types.