Three-color surface photometry of a selected sample of early-type galaxies. II - Color gradients

Details Three-color surface photometry of a selected sample of early-type galaxies. II - Color gradients Three-color surface photometry of a selected sample of early-type galaxies. II - Color gradients

Sep 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...203..217v&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 203, no. 2, Sept. 1988, p. 217-225.

Astronomy and Astrophysics

Astrophysics

83

Astronomical Photometry, Color, Elliptical Galaxies, Galactic Evolution, Spiral Galaxies, Brightness Distribution, Charge Coupled Devices, Dwarf Galaxies, Luminosity, Metallicity

Scientific paper

Selected data from photometric observations of 35 early-type galaxies, obtained in two or three colors (B, R, and MgIb) with CCD cameras and reported by Vigroux et al. (1988), are compiled in graphs and analyzed to determine color gradients and their dependence on other parameters. Features noted include red nuclei and systematic reddening toward the center in high-luminosity galaxies with M(B) less than -18 (interpreted as a metallicity gradient), reddening at greater radial distance in dwarf ellipticals with M(B) greater than -18 (attributed to an age effect), and maximum color gradients at M(B) = -20.5 (where ellipticals tend to become slow rotators). It is inferred that galaxies fainter than this critical luminosity have evolution dominated by internal processes such as galactic winds and dissipation, while brighter galaxies are affected by external processes such as mergers.

Affiliated with

Also associated with

No associations

Rating

Three-color surface photometry of a selected sample of early-type galaxies. II - Color gradients does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Three-color surface photometry of a selected sample of early-type galaxies. II - Color gradients, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Three-color surface photometry of a selected sample of early-type galaxies. II - Color gradients will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-908316