Local Analogs for High-redshift Galaxies: Resembling the Physical Conditions of Interstellar Medium in High-redshift Galaxies.

We present a sample of local analogs for high-redshift selected in the SDSS based on their rest-frame optical emission line properties. The physical properties of the analogs well resemble those in high-z galaxies, including high specific star formation rates, flat UV continuums and compact galaxy sizes. Especially, the ionization parameters and electron densities in these analogs are comparable to those in z=2-3 galaxies,but higher than those in normal SDSS galaxies by ≃0.6 dex and ≃0.9 dex, respectively.These sample of analogs provide a great opportunity to understand the formation and evolution of high-z galaxies.