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- Centre National de la Recherche ScientifiqueFR463 papers
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24 papers · 1 filter
A causal model for a closed universe
M. Cataldo, S. del Campo, P. Minning +1
We study a closed model of a universe filled with viscous fluid and quintessence matter components. The dynamical equations imply that the universe might look like an accelerated f…
The Globular Cluster System of NGC4374
M. Gomez, T. Richtler
We study the globular cluster system (GCS) of the giant elliptical NGC4374 (M84) in the Virgo cluster using B and R photometry. The colour distribution is bimodal with peaks at B-R…
Hamiltonian treatment of Collapsing Thin Shells in Lanczos-Lovelock's theories
J. Crisostomo, S. del Campo, J. Saavedra
The Hamiltonian treatment for the collapse of thin shells for a family of Lanczos-Lovelock theories is studied. This formalism allows us to carry out a concise analysis of these th…
Search for brown-dwarf like secondaries in cataclysmic variables II
R. E. Mennickent, M. P. Diaz, C. Tappert
We have examined VTL/ISAAC 1-2.5 $\umu$m spectroscopy of a sample of short orbital period cataclysmic variables which are candidates for harboring substellar companions. We provide…
Recovery of the old nova V840 Ophiuchi: A carbon rich system
L. Schmidtobreick, C. Tappert, A. Bianchini +1
We present optical spectroscopy and multi colour photometry of the old nova V840 Oph. We rediscovered the nova based on its position in the colour--colour diagrams. It stands out a…
On the photometric variability of blue supergiants in NGC 300 and its impact on the Flux-weighted Gravity-Luminosity Relationship
Fabio Bresolin, Grzegorz Pietrzynski, Wolfgang Gieren +3
We present a study of the photometric variability of spectroscopically confirmed supergiants in NGC 300, comprising 28 epochs extending over a period of five months. We find 15 cle…