Star-Galaxy Classification in Multi-Band Optical Imaging

  title={Star-Galaxy Classification in Multi-Band Optical Imaging},
  author={Ross Fadely and David W. Hogg and Beth Willman},
Ground-based optical surveys such as PanSTARRS, DES, and LSST will produce large catalogs to limiting magnitudes of r 24. Star–galaxy separation poses a major challenge to such surveys because galaxies—even very compact galaxies—outnumber halo stars at these depths. We investigate photometric classification techniques on stars and galaxies with intrinsic FWHM < 0.2 arcsec. We consider unsupervised spectral energy distribution template fitting and supervised, data-driven support vector machines… CONTINUE READING