5.4k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Universidade do PortoPT1k papers
- Centre National de la Recherche ScientifiqueFR606 papers
- Institute of Astrophysics and Space SciencesPT606 papers
- University of GenevaCH406 papers
- Instituto de Astrofísica de CanariasES387 papers
- Institut d'Astrophysique de ParisFR334 papers
- Universidad de La LagunaES330 papers
- National Institute for AstrophysicsIT296 papers
- University of CambridgeGB267 papers
- European Southern ObservatoryCL260 papers
- Aix-Marseille UniversitéFR232 papers
- Osservatorio Astronomico di PadovaIT225 papers
13 papers · 2 filters
Discover of the "missing" mode in HR 1217 by the Whole Earth Telescope
D. W. Kurtz, S. D. Kawaler, R. L. Riddle et al.
HR 1217 is a prototypical rapidly oscillating Ap star that has presented a test to the theory of nonradial stellar pulsation. Prior observations showed a clear pattern of five mode…
Constraining the Matter Power Spectrum Normalization using the SDSS/RASS and REFLEX Cluster surveys
Pedro T. P. Viana, Robert C. Nichol, Andrew R. Liddle
We describe a new approach to constrain the amplitude of the power spectrum of matter perturbations in the Universe, parametrized by sigma_8 as a function of the matter density Ome…
Modified Median Statistics and Type Ia Supernova Data
P. P. Avelino, C. J. A. P. Martins, P. Pinto
The median statistic has recently been discussed by Gott \textit{et al.} as a more reliable alternative to the standard likelihood analysis, in the sense of requiring fewer a…
Asteroseismic Inference for Solar-Type Stars
M. J. P. F. G. Monteiro, J. Christensen-Dalsgaard, M. J. Thompson
The oscillation spectra of solar-type stars may in the not-too- distant future be used to constrain certain properties of the stars. The CD diagram of large versus small frequency…
Atomic T Tauri disk winds heated by ambipolar diffusion II- Observational tests
Paulo J. V. Garcia, Sylvie Cabrit, Jonathan Ferreira +1
Thermal and ionization structures of self-similar, magnetically-driven disk winds obtained in a companion paper \cite{Garcia2001a} are used to compute a series of jet synthetic obs…
Atomic T Tauri disk winds heated by ambipolar diffusion I- Thermal structure
Paulo J. V. Garcia, Jonathan Ferreira, Sylvie Cabrit +1
Motivated by recent subarcsecond resolution observations of jets from T Tauri stars, we extend the work of \citep{Safier93a, Safier93b} by computing the thermal and ionization stru…
CMB constraints on spatial variations of the vacuum energy density
P. P. Avelino, A. Canavezes, J. P. M. de Carvalho +1
In a recent article, a simple `spherical bubble' toy model for a spatially varying vacuum energy density was introduced, and type Ia supernovae data was used to constrain it. Here…
A Supernova Brane Scan
P. P. Avelino, C. J. A. P. Martins
We consider a `brane-world scenario' recently introduced by Dvali, Gabadadze and Porrati, and subsequently proposed as an alternative to a cosmological constant in explaining the c…
An analytical MHD wind model with latitudinal dependences obtained using separation of the variables
J. J. G. Lima, E. R. Priest, K. Tsinganos
A new class of analytical 2-D solutions of the full set of the steady magnetohydrodynamic (MHD) equations, describing an axisymmetric helicoidal magnetized outflow originating from…
Atomic T Tauri disk winds heated by ambipolar diffusion
Paulo J. V. Garcia, Sylvie Cabrit, Jonathan Ferreira +2
We summarize results on the thermal and ionization structure of self-similar, magnetically-driven, atomic disk winds heated by ambipolar diffusion. We improve upon earlier work by…
Supernova constraints on spatial variations of the vacuum energy density
P. P. Avelino, J. P. M. de Carvalho, C. J. A. P. Martins
We consider a very simple toy model for a spatially varying `cosmological constant', where we are inside a spherical bubble (with a given set of cosmological parameters) that is su…
Non-axisymmetric accretion on the classical TTS RW Aur A
P. P. Petrov, G. F. Gahm, J. F. Gameiro +5
(Abridged) High-resolution spectroscopic monitoring of RW Aur A was carried out in 1996, 1998 and 1999 with simultaneous B, V photometry. A multicomponent spectrum is revealed with…
Early-universe constraints on a time-varying fine structure constant
P. P. Avelino, S. Esposito, G. Mangano +6
Higher-dimensional theories have the remarkable feature of predicting a time (and hence redshift) dependence of the `fundamental' four dimensional constants on cosmological timesca…