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60 papers · 1 filter
Adaptive Optics Concept For Multi-Objects 3D Spectroscopy on ELTs
B. Neichel, T. Fusco, M. Puech +7
In this paper, we present a first comparison of different Adaptive Optics (AO) concepts to reach a given scientific specification for 3D spectroscopy on Extremely Large Telescope (…
Harmonic analysis of the Ha velocity field of NGC 4254
Laurent Chemin, Olivier Hernandez, Chantal Balkowski +2
The ionized gas kinematics of the Virgo Cluster galaxy NGC 4254 (Messier 99) is analyzed by an harmonic decomposition of the velocity field into Fourier coefficients. The aims of t…
Mass distribution in nearby Abell clusters
Ewa L. Lokas, Radoslaw Wojtak, Stefan Gottloeber +2
We study the mass distribution in six nearby (z<0.06) relaxed Abell clusters of galaxies A0262, A0496, A1060, A2199, A3158 and A3558. Given the dominance of dark matter in galaxy c…
The evolution of the star formation activity in galaxies and its dependence on environment
B. M. Poggianti, A. von der Linden, G. De Lucia +16
We study how the proportion of star-forming galaxies evolves between z=0.8 and z=0 as a function of galaxy environment, using the [OII] line in emission as a signature of ongoing s…
Photometric colors of late-type giants: theory versus observations
A. Kucinskas, P. H. Hauschildt, H. -G. Ludwig +5
To assess the current status in the theoretical modeling of the spectral properties of late-type giants, we provide a comparison of synthetic photometric colors of late-type giants…
Convection and observable properties of late-type giants
A. Kucinskas, H. -G. Ludwig, P. H. Hauschildt
We show that contrary to what is expected from 1D stationary model atmospheres, 3D hydrodynamical modeling predicts a considerable influence of convection on the spectral propertie…