Surface Brightness Fluctuations and the Stellar Population in Elliptical Galaxies
نویسندگان
چکیده
منابع مشابه
Stellar Populations of Elliptical Galaxies from Surface Brightness Fluctuations
We are using optical/IR surface brightness fluctuations (SBFs) to validate the latest stellar population synthesis models and to understand the stellar populations of ellipticals. Integrated light and spectra measure only the first moment of the stellar luminosity function (ΣniLi). Since SBFs also depend on the second moment (ΣniL 2 i ), they provide novel information, in particular about the r...
متن کاملTheoretical Predictions for Surface Brightness Fluctuations and Implications for Stellar Populations of Elliptical Galaxies
We compute theoretical predictions for surface brightness fluctuations (SBFs) of single-burst stellar populations (SSPs) using models optimized for this purpose. We present results over a wide range of ages (from 1 to 17 Gyr) and metallicities (from 1/200 to 2.5 times solar) and for a comprehensive set of ground-based and space-based optical and infrared bandpasses. Our models agree well with e...
متن کاملSurface Brightness Fluctuations as Stellar Population Indicators
Surface Brightness Fluctuations (SBF) can provide useful information about the unresolved stellar content of early-type galaxies and spiral bulges. The absolute SBF magnitude M in a given passband depends on the properties of the stellar population and can be predicted by population synthesis models. SBF measurements in different bandpasses are sensitive to different evolutionary stages within ...
متن کاملDistances, Metallicities, and Ages of Dwarf Elliptical Galaxies in the Virgo Cluster from Surface Brightness Fluctuations
We have employed FORS1 and 2 at the Very Large Telescope at ESO to acquire deep B and R-band CCD images of 16 dwarf elliptical galaxies in the direction of the Virgo cluster. For each dwarf we measure the apparent Rband surface brightness fluctuation (SBF) magnitude mR and the (B−R)0 colour in a number of fields at different galactocentric distances. From the field-to-field variation of the two...
متن کاملTesting the Surface Brightness Fluctuations Method for Dwarf Elliptical Galaxies in the Centaurus A Group
We have obtained deep B and R-band CCD photometry for five dwarf elliptical galaxies that were previously identified on Schmidt films covering the region of the Centaurus A (Cen A) group. From a Fourier analysis of the R-band CCD images we determined the surface brightness fluctuation (SBF) magnitude m̄R for each stellar system. All magnitudes are similar and, given the small colour spread, sugg...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 1995
ISSN: 0074-1809
DOI: 10.1017/s0074180900109490