Surface Brightness Fluctuations from archival ACS images: a stellar population and distance study

Details Surface Brightness Fluctuations from archival ACS images: a stellar population and distance study Surface Brightness Fluctuations from archival ACS images: a stellar population and distance study

2007-06-29

arxiv.org/abs/0706.4467v1

Astronomy and Astrophysics

Astrophysics

ApJ Accepted

Scientific paper

10.1086/521295

We derive Surface Brightness Fluctuations (SBF) and integrated magnitudes in the V- and I-bands using Advanced Camera for Surveys (ACS) archival data. The sample includes 14 galaxies covering a wide range of physical properties: morphology, total absolute magnitude, integrated color. We take advantage of the latter characteristic of the sample to check existing empirical calibrations of absolute SBF magnitudes both in the I- and V-passbands. Additionally, by comparing our SBF and color data with the Teramo-SPoT simple stellar population models, and other recent sets of population synthesis models, we discuss the feasibility of stellar population studies based on fluctuation magnitudes analysis. The main result of this study is that multiband optical SBF data and integrated colors can be used to significantly constrain the chemical composition of the dominant stellar system in the galaxy, but not the age in the case of systems older than 3 Gyr. SBF color gradients are also detected and analyzed. These SBF gradient data, together with other available data, point to the existence of mass dependent metallicity gradients in galaxies, with the more massive objects showing a non--negligible SBF versus color gradient. The comparison with models suggests that such gradients imply more metal rich stellar populations in the galaxies' inner regions with respect to the outer ones.

Affiliated with

Also associated with

No associations

Rating

Surface Brightness Fluctuations from archival ACS images: a stellar population and distance study 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 Surface Brightness Fluctuations from archival ACS images: a stellar population and distance study, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Surface Brightness Fluctuations from archival ACS images: a stellar population and distance study will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-682292