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Browsing by Author "Fritze, U."
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Analysing globular cluster observations: Models and analysis tools for Lick/IDS indices
Lilly, T.; Fritze, U. (2006)We have extended our evolutionary synthesis code, galev, to include Lick/IDS absorption-line indices for both simple and composite stellar population models (star clusters and galaxies), using polynomial fitting functions. ... -
Analysing Multi-Color Observations of Young Star Clusters in Mergers
Anders, P.; Fritze, U.; de Grijs, R. (Astronomical Society of the Pacific, 2003)We present a new evolutionary synthesis (ES) tool specifically developed for the analysis of multi-color data of young star clusters (YSCs) in interacting galaxies. Our ESO/ST-ECF ASTROVIRTEL1 project provides an unprecedented ... -
Analysing observed star cluster SEDs with evolutionary synthesis models: systematic uncertainties
Anders, P.; Bissantz, N.; Fritze, U.; de Grijs, R. (2004)We discuss the systematic uncertainties inherent to analyses of observed (broad-band) Spectral Energy Distributions (SEDs) of star clusters with evolutionary synthesis models. We investigate the effects caused by restricting ... -
Applications of Evolutionary Synthesis Models : From Nearby to High-z Galaxies
Moller, C.S.; Fritze, U.; Calzetti, D. (2001) -
Beam delivery of femtosecond laser radiation by diffractive optical elements
Momma, C.; Nolte, S.; Kamlage, G.; Fritze, U.; Tunnermann, A. (1998)A novel beam-forming and delivery technique for high-power laser beams for the generation of well-defined intensity distributions based on diffractive optical elements is reported. It will be shown that nonlinear beam ... -
Bright star clusters in the antennae analyzed with evolutionary synthesis
Fritze, U.; Kurth, O. (Wolters Kluwer, 1999)The Antennae galaxies (NGC 4038/39) are a pair of relatively nearby (D ~ 19 Mpc for H0 = 75) gas-rich spirals of comparable mass in the process of merging with extensive dynamical and evolutionary synthesis modelling ... -
Chemical evolution of spiral galaxies from redshift 4 to the present
Fritze, U.; Lindner, U.; Fricke, K.J. (2002) -
Chemically Consistent evolution of Gases: II. Spectrophotmetric evolution from zero to high redshift
Bicker, J.; Fritze, U.; Moeller, C. (2004) -
Chemically Consistent Evolutionary Models With Dust
Moller, C.S.; Fritze, U.; Fricke, K.J.; Calzetti, D. (2001) -
Chemically consistent evolutionary synthesis
Fritze, U.; Weilbacher, P.; Bicker, J. (2003)To account for the range of stellar metallicities in local galaxies and for the increasing importance of low metallicities at higher redshift we present chemically consistent models for the spectral and chemical evolution ... -
Deriving Star Formation Histories : Evolutionary or Population Synthesis Codes versus Color-Magnitude Diagrams
Alloin, D.; Gallart, C.; Fleurence, E.; Pompei, E.; Raimann, I.D.; Fritze, U.; Sukyoung, Y. (2002) -
Detecting metal-rich intermediate-age globular clusters in NGC4570 using K-band photometry
Kotulla, R.; Fritze, U.; Anders, P. (2009)Globular cluster systems (GCSs) of most early-type galaxies feature two peaks in their optical colour distributions. Blue-peak globular clusters (GCs) are believed to be old and metal-poor, whereas the ages, metallicities, ... -
Dust in Spectral Galaxy Evolution Models
Moller, C.S.; Fritze, U.; Fricke, K.J.; Calzetti, D. (Astronomical Society of the Pacific, 2000)To analyse the effects of dust on the UV emission in various galaxy types we present our evolutionary synthesis models which includes dust absorption in a chemically consistent way. We show how the time evolution of the ... -
Dwarf Galaxies and Star Clusters in Tidal Tails
Weilbacher, P.; Fritze, U.; Duc, P.A. (The International Astronomical Union, 2002) -
Evolutionary synthesis modelling of young star clusters in merging galaxies
Anders, P.; Fritze, U.; de Grijs, R. (2003) -
Evolutionary synthesis models for galaxy transformation in clusters
Bicker, J.; Fritze, U.; Fricke, K.J. (2003) -
Evolutionary synthesis models for the formation of S0 galaxies in clusters
Bicker, J.; Fritze, U.; Fricke, K.J. (2002) -
Galaxy Recycling : The first sample of TDG candidates
Weilbacher, P.; Duc, P.A.; Fritze, U. (2001) -
Galaxy transformation processes in clusters.--
Fritze, U.; Woudt, P. (2005) -
GALEV evolutionary synthesis models – I. Code, input physics and web interface
Kotulla, R.; Fritze, U.; Weilbacher, P.; Anders, P. (2009)galev (GALaxy EVolution) evolutionary synthesis models describe the evolution of stellar populations in general, of star clusters as well as of galaxies, both in terms of resolved stellar populations and of integrated light ...