UIR BANDS IN THE DISKS OF EDGE-ON SPIRAL GALAXIES: =20

we propose to observe the midinfrared spectra of the general disk em ission20 of two edgeon spirals, ngc891 and ngc5907, and the amorphous starbur st galaxy m82. raster maps with 32 points are measured along the central dust20 lane of each galaxy. this will give a representative sample of differ ent20 lines of sight through the galactic disks, with the uir emission band s20 being generated partly in diffuse medium and partly in the uvenhance d20 star formation areas of the galaxies. this proposal has been motivated by the results of our ongoing isoph ots20 spectrophotometry of the diffuse emission of the milky way disk. the results of the present proposal will be compared with the milky way results. we expect that our study will provide useful information on the abundance and distribution of the uir band carriers in spiral galaxies. furthermore, this study should provide useful data also for the interpretation of midinfrared broadband photometr y of galaxies, as obtained by iras or by iso. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]