14 Result(s)
within
R. P. Saglia
Physics
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Chapter and Conference Paper
Supermassive Black Holes in Galaxies
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Chapter and Conference Paper
Evolution of the Galaxy Luminosity Function in the Fors Deep Field (FDF)
With the large homogeneous dataset and the accurate photometric redshifts (Δz/(z+1)≈0.03) of the FORS Deep Field (FDF) we are able to study the evolution of the luminosity function in various bands from low (〈z〉=...
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Chapter and Conference Paper
The FORS Deep Field: Photometric Data and Photometric Redshifts
Deep multicolor fields are an important tool to explore the formation and evolution of galaxies out to the highest redshifts and faintest magnitude limits (Ferguson et al. [11]). This is also the aim of the FO...
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Chapter and Conference Paper
Stellar Population in a High Density Environment: Elliptical Galaxies in the Coma Cluster
The Coma cluster is an ideal place to study galaxy properties as a function of environmental density in order to constrain theories of galaxy formation and evolution. Here we present a spectral analysis of a m...
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Chapter and Conference Paper
Mass Distribution of the E0 Galaxy Ngc 6703 from Absorption Line Profile Kinematics
Absorption line velocity profiles (VPS) contain important information on the anisotropy and mass distribution of elliptical galaxies (e.g., Gerhard 1993, Merritt 1993). Here we briefly present results of an ex...
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Chapter and Conference Paper
The EFAR Project: Monte Carlo Testing of the Fundamental Plane Distance Estimator
The EFAR project is a long-term study of 736 candidate early-type galaxies in 84 clusters lying in two directions towards Hercules-Corona Borealis and PerseusPisces-Cetus at distances 6000–15000 km/s. In the f...
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Chapter and Conference Paper
Evolution of Elliptical Galaxies up to z ≈ 1
We review the observational evidence showing that luminous cluster elliptical galaxies are old stellar systems, undergoing mostly passive stellar evolution up to redshift z ≈ 1, with approximate coeval epoch of f...
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Chapter and Conference Paper
Anisotropy and Mass in Elliptical Galaxies
Changes in the anisotropy of the stars and changes in the galaxy potential due to dark matter manifest themselves differently in the observable line (velocity) profile shapes (VPs) of elliptical galaxies (Gerh...
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Chapter and Conference Paper
Dark Matter Halos
The observational evidence for dark halos around galaxies is shortly reviewed. New and old techniques and results constraining the mass, the distribution, the shape and the nature of dark halos are discussed.
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Chapter and Conference Paper
Elliptical Galaxies with Dark Matter
One component stellar dynamical models can provide excellent zeroth order description of currently available data for elliptical galaxies (see, e.g., Bertin, Saglia, Stiavelli, 1988; van der Marel, Binney and ...
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Chapter and Conference Paper
Self-consistent Models of Spherical Galaxies with Dark Matter
A well-known result of the analysis of extended HI rotation curves of spiral galaxies is that these objects have an M/L ratio that increases with the galactocentric distance. For the case of elliptical galaxie...
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Chapter and Conference Paper
The Luminosity Law of Ellipticals; A Test of a Family of Anisotropic Models on Eight Galaxies
An important clue to the structure and dynamics of elliptical galaxies is provided by the empirical r 1/4 luminosity law proposed by de Vaucouleurs (1948). The existence of such a law is indicative ...
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Chapter
Dark Matter in Elliptical Galaxies
Photometric and kinematical data (stellar velocity dispersion) for a set of bright elliptical galaxies (NGC 3379, 4374, 4472, 4486, 4636, 7562, 7619, 7626) have been analyzed in terms of self-consistent anisot...
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Chapter and Conference Paper
Is there Dark Matter in Elliptical Galaxies?
The presence and distribution of dark matter in elliptical galaxies is expected to be constrained not only by the properties of the overall force field (as could be traced by an HI rotation curve), but also by...
