1.3k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Universidad de Buenos AiresAR743 papers
- Consejo Nacional de Investigaciones Científicas y TécnicasAR567 papers
- Centre National de la Recherche ScientifiqueFR264 papers
- Fundación Ciencias Exactas y NaturalesAR221 papers
- Universidad Nacional de La PlataAR178 papers
- Universidad Nacional Autónoma de MéxicoMX142 papers
- Bariloche Atomic CentreAR139 papers
- Balseiro InstituteAR137 papers
- Comisión Nacional de Energía AtómicaAR132 papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR122 papers
- Pennsylvania State UniversityUS116 papers
- Universidade de São PauloBR113 papers
35 papers · 1 filter
Microquasars: Open Questions and Future Perspectives
I. F. Mirabel
The discovery and subsequent study of microquasars lead to major progress in our understanding of: 1) the nature of relativistic jets seen elsewhere in the universe, and 2) the con…
A search for possible interactions between ejections from GRS 1915+105 and the surrounding interstellar medium
S. Chaty, L. F. Rodriguez, I. F. Mirabel +5
We have observed an extended region surrounding the first discovered galactic superluminal source GRS 1915+105, seeking evidence of interaction between the relativistic ejecta of t…
Mid-Infrared observations of GRS 1915+105 and SS433
Y. Fuchs, I. F. Mirabel, R. N. Ogley
We have observed in the mid-infrared (4-18 micron) the counterpart of the compact object GRS 1915+105, and the western jet of SS433. The images were carried out with the ISOCAM inf…
On the nature of the microquasar V4641 Sagittarii
S. Chaty, I. F. Mirabel, J. Marti +1
We present photometric and spectroscopic optical and near-infrared (NIR) observations taken during the outburst on September 1999 of the source V4641 Sgr = SAX J1819.3-2525 (in'tza…
Chemical Evolution of the Stellar and Gaseous Components of Galaxies in Hydrodynamical Cosmological Simulations
S. A. Cora, P. B. Tissera, D. G. Lambas +1
We present preliminary results on the effects of mergers on the chemical properties of galactic objects in hierarchical clustering scenarios. We adopt a hydrodynamical chemical cod…
A molecular shell with star formation toward the supernova remnant G349.7+0.2
Estela M. Reynoso, Jeffrey G. Mangum
A field of ~38'x38' around the supernova remnant (SNR) G349.7+0.2 has been surveyed in the CO J=1-0 transition with the 12 Meter Telescope of the NRAO, using the On-The-Fly techniq…
Operator ordering for generally covariant systems
Rafael Ferraro, Daniel M. Sforza
The constraint operators belonging to a generally covariant system are found out within the framework of the BRST formalism. The result embraces quadratic Hamiltonian constraints w…
CO observations toward supernova remnants with associated OH 1720 MHz masers
Estela M. Reynoso, Jeffrey G. Mangum
The environs of three supernova remnants (SNR) with associated OH 1720 MHz masers, G349.7+0.2, CTB 37A and G16.7+0.1, have been surveyed in the CO J=1-0 transition with the 12 Mete…
Towards the solution of the relativistic gravitational radiation reaction problem for binary black holes
Carlos O. Lousto
Here we present the results of applying the generalized Riemann zeta-function regularization method to the gravitational radiation reaction problem. We analyze in detail the headon…
Peculiar Extended X-ray Emission around the "Radio-Loud" Black Hole Candidate 1E1740.7-2942
Wei Cui, N. S. Schulz, F. K. Baganoff +7
We present the discovery of peculiar extended X-ray emission around 1E1740.7-2942, a black hole candidate that is known to produce prominent, persistent radio jets. The data was ob…
Mixing of magnetic and phononic excitations in incommensurate Spin-Peierls systems
Ariel Dobry, David Ibaceta
We analyze the excitation spectra of a spin-phonon coupled chain in the presence of a soliton. This is taken as a microscopic model of a Spin-Peierls material placed in a high magn…
Phase space path integral in curved space
R. Ferraro, M. Leston
Phase space path integral is worked out in a riemannian geometry, by employing a prescription for the infinitesimal propagator that takes riemannian normal coordinates and momenta…
Renormalization and Short Distance Singular Structure
Mario Castagnino
The relation between renormalization and short distance singular divergencies in quantum field theory is studied. As a consequence a finite theory is presented. It is shown that th…
The Time-Asymmetry and the Entropy Gap
Roberto Aquilano, Mario Castagnino
The universe time-asymmetry is essentially produced by its low-entropy unstable initial state. Using quanlitative arguments, Paul Davies has demonstrated that the universe expansio…
Global phase time and path integral for string cosmological models
Gaston Giribet, Claudio Simeone
A global phase time is identified for homogeneous and isotropic cosmological models yielding from the low energy effective action of closed bosonic string theory. When the Hamilton…
The highly polarized open cluster Trumpler 27
Carlos Feinstein, Gustavo Baume, Ruben Vazquez +2
We have carried out multicolor linear polarimetry (UBVRI) of the brightest stars in the area of the open cluster Trumpler 27. Our data show a high level of polarization in the stel…
Galaxy Formation and Chemical Evolution in Hierarchical Hydrodynamical Simulations
S. A. Cora, M. B. Mosconi, P. B. Tissera +1
We report first results of an implementation of a chemical model in a cosmological code, based on the Smoothed Particle Hydrodynamics (SPH) technique. We show that chemical SPH sim…
Chemical evolution using SPH cosmological simulations. I: implementation, tests and first results
M. B. Mosconi, P. B. Tissera, S. A. Cora +1
We develop a model to implement metal enrichment in a cosmological context based on the hydrodynamical AP3MSPH code described by Tissera, Lambas and Abadi (1997).The star formation…
Aspects of the free field description of string theory on AdS_3
Gaston Giribet, Carmen Nunez
The near boundary limit of string theory in AdS_3 is analysed using the Wakimoto free field representation of SL(2,R). The theory is considered as a direct product of the SL(2,R)/U…
Quantization of the Taub cosmological model with extrinsic time
Gabriel Catren, Rafael Ferraro
The paper addresses the quantization of minisuperspace cosmological models, with application to the Taub Model. By desparametrizing the model with an extrinsic time, a formalism is…
Macroscopical matter derived from Quantum Field Theory
G. Domenech, M. L. Levinas
We develop the WKB expansion to relate Quantum Field Theory variables with those describing macroscopical matter. We find that, up to the first quantum correction, free scalar fiel…
Entropy generation in cosmological particle creation
Mario A. Castagnino, Fabian H. Gaioli, Daniel M. Sforza
A very simplified model of the Universe is considered in order to propose an alternative approach to the irreversible evolution of the Universe at very early times. The entropy gen…
AU-Scale Synchrotron Jets and Superluminal Ejecta in GRS 1915+105
V. Dhawan, I. F. Mirabel, L. F. Rodriguez
Radio imaging of the microquasar GRS 1915+105 with the Very Long Baseline Array (VLBA) during various flaring, quiescent, or oscillatory states of the black hole binary, always res…
Functional Approach to Quantum Decoherence and the Classical Final Limit: the Mott and Cosmological problems
Mario Castagnino, Roberto Laura
Decoherence and the approach to the classical final limit are studied in two similar cases: the Mott and the Cosmological problems.