We identify nine galaxies with dynamical masses of M _ { dyn } \gtrsim 10 ^ { 10 } M _ { \odot } as photometric point sources , but with redshifts between z = 0.2 and z = 0.6 , in the Sloan Digital Sky Survey ( SDSS ) spectro-photometric database .
All nine galaxies have archival Hubble Space Telescope ( HST ) images .
Surface brightness profile fitting confirms that all nine galaxies are extremely compact ( 0.4 < R _ { e,c } < 6.6 kpc with the median R _ { e,c } = 0.74 kpc ) for their velocity dispersion ( 110 < \sigma < 340 km s ^ { -1 } ; median \sigma = 178 km s ^ { -1 } ) .
From the SDSS spectra , three systems are dominated by very young stars ; the other six are older than \sim 1 Gyr ( two are E+A galaxies ) .
The three young galaxies have disturbed morphologies and the older systems have smooth profiles consistent with a single Sérsic function .
All nine lie below the z \sim 0 velocity dispersion-half-light radius relation .
The most massive system - SDSSJ123657.44+631115.4 - lies right within the locus for massive compact z > 1 galaxies and the other eight objects follow the high-redshift dynamical size-mass relation .