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A robust detection of the tidally induced intrinsic alignments of thelate-type spiral galaxies with high statistical significance is reported. Fromthe spectroscopic galaxy sample of SDSS DR7 compiled by Huertas-Company et al.which lists each galaxy's probabilities of being in five Hubble types,P(E),P(Ell), P(S0),P(Sab), P(Scd), we select the nearby large late-type spiralgalaxies which have redshifts of 0<=z<=0.02, probabilities of P(Scd)>=0.5 andangular sizes of D>=7.92 arcsec. The spin axes of the selected nearby largelate-type spiral galaxies are determined up to the two-fold ambiguity with thehelp of the circular thin-disk approximation and their spatial correlations aremeasured as a function of the separation distance r. A clear signal of theintrinsic correlation as high as 3.4 sigma and 2.4 sigma is found at theseparation distance of r~1Mpc/h and r~2Mpc/h, respectively. The comparison ofthis observational results with the analytic model based on the tidal torquetheory reveals that the spin correlation function for the late-type spiralgalaxies follow the quadratic scaling of the linear density correlation andthat the intrinsic correlations of the galaxy spin axes are stronger than thatof the underlying dark halos. We investigate a local density dependence of thegalaxy spin correlations and found that the correlations are stronger for thegalaxies located in dense regions having more than 10 neighbors within 2Mpc/h.We also attempt to measure a luminosity dependence of the galaxy spincorrelations, but find that it is impossible with our magnitude-split samplesto disentangle a luminosity from a redshift dependence. We provide the physicalexplanations for these observational results and also discuss the effects ofpossible residual systematics on the results.

On the Intrinsic Alignments of the Late-Type Spiral Galaxies from the Sloan Digital Sky Survey Data Release 7