We analyze the relationship between the mass of a spherical component and the minimum possible thickness of stable stellar disks. This relationship for real galaxies allows the lower limit on the dark halo mass to be estimated (the thinner the stable stellar disk is, the more massive the dark halo must be). In our analysis, we use both theoretical relations and numerical N-body simulations of t...

We analyze the relationship between the mass of a spherical component and the minimum possible thickness of stable stellar disks. This relationship for real galaxies allows the lower limit on the dark halo mass to be estimated (the thinner the stable stellar disk is, the more massive the dark halo must be). In our analysis, we use both theoretical relations and numerical N-body simulations of t...

Using a statistically representative sample of 911 central galaxies (CENs) from the SDSS DR4 Group Catalogue, we study how the structure (shape and size) of the first rank (by stellar mass) group and cluster members depends on (1) galaxy stellar mass (Mstar), (2) the global environment defined by the dark matter halo mass (Mhalo) of the host group, and (3) the local environment defined by their...

We present the stellar population content of early-type galaxies from the ATLAS3D survey. Using spectra integrated within apertures covering up to one effective radius, we apply two methods: one based on measuring line-strength indices and applying single stellar population (SSP) models to derive SSP-equivalent values of stellar age, metallicity, and alpha enhancement; and one based on spectral...

We present the broad-band UV through mid-infrared spectral energy distributions (SEDs) of a sample of 72 spectroscopically-confirmed star-forming galaxies at z = 2.30± 0.3. Located in a 72 arcmin field centered on the bright background QSO, HS1700+643, these galaxies were pre-selected to lie at z ∼ 2 based solely on their rest-frame UV colors and luminosities, and should be representative of UV...

We present the stellar population content of early-type galaxies from the ATLAS survey. Using spectra integrated within apertures covering up to one effective radius, we apply two methods: one based on measuring line-strength indices and applying single stellar population (SSP) models to derive SSP-equivalent values of stellar age, metallicity, and alpha enhancement; and one based on spectral f...

We have explored radial color and stellar surface mass density profiles for a sample of 85 latetype spiral galaxies with deep (down to ∼27 mag/arcsec) SDSS g’ and r’ band surface brightness profiles. About 90% of the light profiles have been classified as broken exponentials, either exhibiting truncations (Type II galaxies) or antitruncations (Type III galaxies). The color profiles of Type II g...

We present and discuss evolutionary synthesis models for massive stellar populations generated with the Starburst99 code in combination with a new set of stellar evolution models accounting for rotation. The new stellar evolution models were compiled from several data releases of the Geneva group and cover heavy-element abundances ranging from twice solar to one fifth solar. The evolution model...

We present a photometric halo mass estimation technique for local galaxies that enables us to establish the stellar mass-halo (SMHM) relation down masses of 10$^5$ M$_\odot$. find no detectable differences among SMHM relations four galaxy clusters or between cluster and field we agreement with extrapolations previous derived using abundance matching approaches. fit power law our empirical adopt...