アブストラクト：
Galactic outflows are thought to play an important role in regulating galaxy evolution, but it remains unclear what galaxy property is the main contributor to driving the outflows. We compute the correlation between the galaxy and the outflow properties with SDSS spectra of ~100,000 star-forming galaxies. We stack galaxy spectra in bins of SFR, M_*, u-band size, inclination, and dust extinction to measure the blueshifts of the NaID lines. We find that the blueshift values have a strong correlation with SFR, M_*, and size. Moreover, the absorption lines are blueshifted in galaxies of log(\Sigma_SFR [Mo/yr/kpc2]) >~ -1.75, which is lower than the classical threshold log(\Sigma_SFR) >~ -1.0.