Multiband analysis of the surface brightness distributions of SB and SC spirals CCD images. I - Observations

Details Multiband analysis of the surface brightness distributions of SB and SC spirals CCD images. I - Observations Multiband analysis of the surface brightness distributions of SB and SC spirals CCD images. I - Observations

Jun 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26as...93..557p&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 93, no. 3, June 1992, p. 557-585.

Astronomy and Astrophysics

Astrophysics

16

Astronomical Photometry, Brightness Distribution, Charge Coupled Devices, Gray Scale, Spectrophotometry, Spiral Galaxies, Angular Resolution, Cosmic Dust, Data Reduction, Galactic Bulge, Metallic Stars, Radial Distribution

Scientific paper

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.

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