SBF: multi-wavelength data and models

M. Cantiello; G. Raimondo; J. P. Blakeslee; E. Brocato; M. Capaccioli

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arXiv · 0704.1002

SBF: multi-wavelength data and models

M. Cantiello·G. Raimondo·J. P. Blakeslee·E. Brocato·M. Capaccioli

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Abstract

Recent applications have proved that the Surface Brightness Fluctuations (SBF) technique is a reliable distance indicator in a wide range of distances, and a promising tool to analyze the physical and chemical properties of unresolved stellar systems, in terms of their metallicity and age. We present the preliminary results of a project aimed at studying the evolutionary properties and distance of the stellar populations in external galaxies based on the SBF method. On the observational side, we have succeeded in detecting I-band SBF gradients in six bright ellipticals imaged with the ACS, for these same objects we are now presenting also B-band SBF data. These B-band data are the first fluctuations magnitude measurements for galaxies beyond 10 Mpc. To analyze the properties of stellar populations from the data, accurate SBF models are essential. As a part of this project, we have evaluated SBF magnitudes from Simple Stellar Population (SSP) models specifically optimized for the purpose. A wide range of chemical compositions and ages, as well as different choices of the photometric system have been investigated. All models are available at the Teramo-Stellar Populations Tools web site: www.oa-teramo.inaf.it/SPoT.

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BibTeX RIS

M. Cantiello, G. Raimondo, J. P. Blakeslee, E. Brocato, M. Capaccioli. 2007-04-07. SBF: multi-wavelength data and models. https://arxiv.org/abs/0704.1002

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