Summary: THE ASTRONOMICAL JOURNAL, 122 : 1298È1318, 2001 September
( 2001. The American Astronomical Society. All rights reserved. Printed in U.S.A.
HOMOGENIZATION OF THE STELLAR POPULATION ALONG LATE­TYPE SPIRAL GALAXIES1
D. A. GADOTTI AND S. DOS ANJOS
Departamento de Astronomia, Instituto e Universidade de Paulo, Avenida Miguel Stefano 4200,
Astrono
ü mico Geof.
# sico, Sa
8 o
04301­904 Paulo, SP, Brazil ;
Sa
8 o dimitri=iagusp.usp.br, sandra=iagusp.usp.br
Received 2000 September 27 ; accepted 2001 June 12
ABSTRACT
We present a study of the broadband UBV color proÐles for 257 Sbc barred and nonbarred galaxies,
using photoelectric aperture photometry data from the literature. Using robust statistical methods, we
have estimated the color gradients of the galaxies, as well as the total and bulge mean colors. A compa­
rative photometric study using CCD images was done. In our sample, the color gradients are negative
(reddish inward) in approximately 59% of the objects, are almost null in 27%, and are positive in 14%,
considering only the face­on galaxies, which represent approximately 51% of the sample. The results do

Source: Alexei, Dimitri - European Southern Observatory

Collections: Physics