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16 papers · 2 filters
Spiral inflow feeding the nuclear starburst in M83, observed in H-alpha emission with the GHAFAS Fabry-Perot interferometer
Kambiz Fathi, John E. Beckman, Andreas A. Lundgren +8
We present observations of the nearby barred starburst galaxy, M83 (NGC5236), with the new Fabry-Perot interferometer GHAFAS mounted on the 4.2 meter William Herschel Telescope on…
Comparison between 2-D and 3-D codes in dynamical simulations of gas flow in barred galaxies
I. Perez
Context: One of the ways to determine the contribution of the dark halo to the gravitational potential of a galaxy is the study of non-circular (streaming) motions and the associat…
Non-linear Preheating with Scalar Metric Perturbations
M. Bastero-Gil, M. Tristram, J. Macias-Perez +1
We have studied preheating of field perturbations in a 3-dimensional lattice including the effect of scalar metric perturbations, in two generic models of inflation: chaotic inflat…
VCC 2062: an old Tidal Dwarf Galaxy in the Virgo Cluster?
Pierre-Alain Duc, Jonathan Braine, Ute Lisenfeld +2
Numerical simulations predict the existence of old Tidal Dwarf Galaxies (TDGs) that would have survived several Gyr after the collision lying at their origin. Such survivors, which…
Discovery of a galactic wind in the central region of M100
J. Jiménez-Vicente, A. Castillo-Morales, E. Mediavilla +1
We report the discovery of a galactic wind in the central region of the galaxy M100. This result is based on a careful 2D spectroscopic study performed on observations made with th…
The night-sky at the Calar Alto Observatory
S. F. Sanchez, J. Aceituno, U. Thiele +2
We present a characterization of the main properties of the night-sky at the Calar Alto observatory for the time period between 2004 and 2007. We use optical spectrophotometric dat…