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S. Mitronova (SAO RAS), D. Bizyaev (NOAO, SAI)
We analyze J, H, and Ks 2MASS images of 140 late-type edge-on galaxies selected from the RFGC catalog (which contains flat galaxies with major-to-minor axis ratio a/b > 7). The NIR scalelengths (z0) and scaleheights (h) of the stellar disks are determined for all selected galaxies. The mean relative ratios of the scaleheights of their stellar disks are 1.00:0.91:0.84 in J:H:Ks bands, respectively. We conclude that the scaleheight determined from the Ks-band images is, on average, 13% larger than the extinction-free scaleheight. This difference is much larger when the scaleheights are found from the optical band images. The relative thickness (z0/h) of the stellar disks correlates well with their deprojected central surface brightness obtained from the 2MASS images. This project is partially supported by grant RFBR 04-02-16518.
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Bulletin of the American Astronomical Society, 37 #4
© 2005. The American Astronomical Soceity.