482 citations
- Valongo ObservatoryBR77 papers
- European Southern ObservatoryCL13 papers
- Universidade Federal do Rio Grande do NorteBR13 papers
- Instituto de Astrofísica de CanariasES10 papers
- Instituto Nacional de Pesquisas EspaciaisBR10 papers
- Centro Brasileiro de Pesquisas FísicasBR8 papers
- Observatoire de la Côte d’AzurFR8 papers
- Thüringer Landessternwarte TautenburgDE8 papers
- Universidade de São PauloBR8 papers
- Centre National de la Recherche ScientifiqueFR6 papers
- Kitt Peak National ObservatoryUS6 papers
- Osservatorio Astronomico di PadovaIT6 papers
27 papers · 2 filters
-exponential inflation
J. S. Alcaniz, F. C. Carvalho
An inflationary scenario driven by a slow rolling homogeneous scalar field whose potential is given by a generalized exponential function is discussed. Within the {\sl slow-…
On the hydrogen neutral outflowing disks of B[e] supergiants
Michaela Kraus, Marcelo Borges Fernandes, Francisco X. de Araujo
(abridged) B[e] supergiants are known to possess geometrically thick dusty disks. Disk-forming wind models have, however, been found to be insufficient in reproducing the observed…
HII Galaxies with 3D Spectroscopy
C. Kehrig, J. M. Vilchez, S. F. Sanchez +3
We present our ongoing work on integral field spectroscopy of three prototypical HII galaxies: IIZw70, IIZw71 and IZw18. The data are mainly used to study the ionized gas and stell…
Simplified Quartessence Cosmology
J. A. S. Lima, J. V. Cunha, J. S. Alcaniz
We propose a new class of accelerating world models unifying the cosmological dark sector (dark matter and dark energy). All the models are described by a simplified version of the…
Energy Conditions and Supernovae Observations
J. Santos, J. S. Alcaniz, M. J. Reboucas
In general relativity, the energy conditions are invoked to restrict general energy-momentum tensors on physical grounds. We show that in the standard Friedmann-Lemaitre-Robertson-…
Detailed Far-UV to Optical Analysis of Four [WR] Stars
W. L. F. Marcolino, D. J. Hillier, F. X. de Araujo +1
We present far-UV to optical analyses of four hydrogen deficient central stars of planetary nebulae: BD+303639, NGC 40, NGC 5315 and NGC 6905. Using the radiative transfer code CMF…