J/A+AS/93/557 J/A+AS/93/557 Multiband analysis of the surface brightness M Prieto D P T Longley E Perez J E Beckman A M Varela J Cepa Astron. Astrophys. Suppl. Ser. 93 557 1992 1992A&AS...93..557P galaxies: photometry galaxies: spiral galaxies: stellar content Results are presented of an imaging study of eight Sb-Sc spirals, based on CCD observations in the B, V, R, I, and Z photometric filters. Presented are grey scale images, both in individual bands and in color indices, isophote maps, the parameters of the best fits to the isophotes (ellipticity and position angle as functions of deprojected radius), and radial profiles in the passbands. The paper explains how the radial intensity profiles of these galaxies are naturally divisible into inner bulge, outer disk, and an intermediate zone, and it is shown how the color index images can aid in the diagnostics of reddening effects due to older or more metallic stellar population on the one hand, and dust on the other. The data are presented with a view to facilitating the task of dynamically reliable bulge-disk decomposition.

NGC Galaxy designation --- Type Hubble type and luminosity class --- Bt Total apparent blue magnitude corrected for galactic and internal absorption mag M_Bt Total absolute blue magnitude corrected for galactic and internal absorption. mag D Distance, using Ho = 75 km/s/Mpc, from the corrected recession velocity relative to the centroid of the Local Group Mpc R'25 Isophotal major axis distance to 25. mag/arcsec^2 corrected to "face on". arcmin PA(B) Position angle (North eastward) in B filter deg e_PA(B) mean error on PA(B) deg PA(V) Position angle (North eastward) in V filter deg e_PA(V) mean error on PA(V) deg PA(R) Position angle (North eastward) in R filter deg e_PA(R) mean error on PA(R) deg PA(I) Position angle (North eastward) in I filter deg e_PA(I) mean error on PA(I) deg PA(Z) Position angle (North eastward) in Z filter deg e_PA(Z) mean error on PA(Z) deg PA Mean Position angle (North eastward) deg e(B) Disc eccentricity in B filter --- e_e(B) mean error on e(B) --- e(V) Disc eccentricity in V filter --- e_e(V) mean error on e(V) --- e(R) Disc eccentricity in R filter --- e_e(R) mean error on e(R) --- e(I) Disc eccentricity in I filter --- e_e(I) mean error on e(I) --- e(Z) Disc eccentricity in Z filter --- e_e(Z) mean error on e(Z) --- i Mean inclination angle deg Francois Ochsenbein CDS 1993May18 J_A+AS_93_557.xml