We present results of an analysis of the J , H , and K _ { s } 2MASS images of 139 spiral edge-on galaxies selected from the Revised Flat Galaxies Catalog .
The basic structural parameters scalelength ( h ) , scaleheight ( z _ { 0 } ) , and central surface brightness of the stellar disks ( \mu _ { 0 } ) are determined for all selected galaxies in the NIR bands .
The mean relative ratios of the scaleheights of the thin stellar disks in the J : H : K _ { s } bands are 1.16:1.08:1.00 , respectively .
Comparing the scaleheights obtained from the NIR bands for the same objects , we estimate the scaleheights of the thin stellar disks corrected for the internal extinction .
We find that the extinction-corrected scaleheight is , on average , 11 % smaller than that in the K-band .
Using the extinction-corrected structural parameters , we find that the dark-to-luminous mass ratio is , on average , 1.3 for the galaxies in our sample within the framework of a simplified galactic model .
The relative thicknesses of the stellar disks z _ { 0 } / h correlates with their face-on central surface brightnesses obtained from the 2MASS images .
We also find that the scaleheight of the stellar disks shows no systematic growth with radius in most of our galaxies .