Cosmic distances from surface brightness fluctuations
نویسندگان
چکیده
منابع مشابه
Distances, 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 کاملStellar 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...
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Anomalously high K-band surface brightness fluctuations (SBF) have been reported in NGC 4489 by Pahre & Mould (1994), Jensen et al. (1996) and Jensen et al. (1998). However, these conclusions were uncertain because of relatively low signal-to-noise data. New high signal-to-noise data for NGC 4489 have been obtained at the NOAO/KPNO 2.1m and the ESO/La Silla 3.5m NTT telescopes. Adopting the I-b...
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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 کاملPotential of the Surface Brightness Fluctuations method to measure distances to dwarf elliptical galaxies in nearby clusters
The potential of the Surface Brightness Fluctuations (SBF) method to determine the membership of dwarf elliptical galaxies (dEs) in nearby galaxy clusters is investigated. Extensive simulations for SBF measurements on dEs in the I band for various combinations of distance modulus, seeing and integration time are presented, based on average VLT FORS1 and FORS2 zero points. These show that for di...
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ژورنال
عنوان ژورنال: Proceedings of the International Astronomical Union
سال: 2012
ISSN: 1743-9213,1743-9221
DOI: 10.1017/s174392131202159x