the independent model used by meyer and schramm (here after m&s) for determining the age ofelements (chemical evolution) is extended. using new and extended definitions and including parametersignored by m&s, the galactic evolution equations are solved to determine the total duration ofnucleosynthesis,t. to be able to calculate the t t (mean age time for formation of elements to total ...

Galaxy comoving number density is commonly used to forge progenitor/descendant links between observed galaxy populations at different epochs. However, this method breaks down in the presence of galaxy mergers, or when galaxies experience stochastic growth rates. We present a simple analytic framework to treat the physical processes that drive the evolution and diffusion of galaxies within comov...

The processes that transformed small, turbulent, relatively unstructured protogalaxies into rotating spiral or giant elliptical galaxies are not well understood. Most expected to go through a spiral-like phase, maturing an structure. Many local have classic disk of young stars as “bulge” older red at their centers; these two features considered be signatures evolved from original primordial for...

The Galaxy Evolution Probe (GEP) is a concept for mid- and far-infrared space observatory to measure key properties of large samples galaxies with unbiased surveys. GEP will attempt achieve zodiacal light Galactic dust emission photon background-limited observations by utilizing 6-K, 2.0-m primary mirror sensitive arrays kinetic inductance detectors (KIDs). It have two instrument modules: 10 40...

The CNOC2 Field Galaxy Redshift Survey presently contains some 5000 galaxy redshifts, plus extensive UBgRI photometry, and is the largest galaxy sample at moderate redshifts 0.1 < z < 0.6. Here we present some preliminary results on the galaxy luminosity function (LF) and its redshift evolution, using a sample of R < 21.5 CNOC2 galaxies, subdivided into early, intermediate, and late types based...

Galaxy cumulative comoving number density is commonly used to forge progenitor/descendant links between observed galaxy populations at different epochs. However, this method breaks down in the presence of galaxy mergers, or when galaxies experience stochastic growth rates. We present a simple analytic framework to treat the physical processes that drive the evolution and diffusion of galaxies w...