Internal Kinematics of Luminous Compact Blue Galaxies

We describe the dynamical properties which may be inferred from HST/STIS spectroscopic observations of luminous compact blue galaxies (LCBGs) between 0.1<z<0.7. While the sample is homogeneous in blue rest-frame color, small size and line-width, and high surface-brightness, their detailed morphology is eclectic. Here we determine the amplitude of rotation versus random, or disturbed motions of the ionized gas. This information affirms the accuracy of dynamical mass and M/L estimates from Keck integrated line-widths, and hence also the predictions of the photometric fading of these unusual galaxies. The resolved kinematics indicates this small subset of LCBGs are dynamically hot, and unlikely to be embedded in disk systems.Comment: To appear in "Starbursts: from 30 Doradus to Lyman Break Galaxies" 2005, eds. R. de Grijs and R. M. Gonzalez Delgado (Kluwer

On the Space Time of a Galaxy

We present an exact solution of the averaged Einstein's field equations in the presence of two real scalar fields and a component of dust with spherical symmetry. We suggest that the space-time found provides the characteristics required by a galactic model that could explain the supermassive central object and the dark matter halo at once, since one of the fields constitutes a central oscillaton surrounded by the dust and the other scalar field distributes far from the coordinate center and can be interpreted as a halo. We show the behavior of the rotation curves all along the background. Thus, the solution could be a first approximation of a ``long exposition photograph'' of a galaxy.Comment: 8 pages REVTeX, 11 eps figure

Psychological well-being in dancers: a social cognitive analysis

Este estudio analizó el clima motivacional, la satisfacción de necesidades, la motivación autodeterminada y la satisfacción/interés como predictores del bienestar psicológico de 303 bailarines. Se utilizaron escalas traducidas al castellano y adaptadas a la danza: PMCSQ (Perception of Motivational Climate Sport Questionaire), SMS (Sport Motivation Scale), SSI (Sport Satisfaction and Interest Scale) y PGWB (Perceived General Well-Being Scale); y cinco ítems elaborados en el estudio para medir el clima autodeterminante. Se planteó un modelo de relaciones causales con la siguientes secuencia: clima rendimiento y maestría → clima autodeterminante → satisfacción necesidades → motivación → satisfacción/interés → bienestar psicológico. Adicionalmente el modelo contemplaba las relaciones: Clima rendimiento y clima maestría → motivación; y satisfacción de necesidades y motivación → bienestar psicológico. El modelo se analizó mediante SEM y mostró significación para las relaciones hipotetizadas e índices de ajuste aceptables, apoyando los postulados de la Teoría de las Metas de Logro y la Teoría de la AutodeterminaciónThis study analysed the following variables: motivational climate, need satisfaction, motivation and satisfaction/interest, as predictors of psychological well-being of 303 dancers. Four scales were translated to Spanish and adapted to dance: PMCSQ (Perception of Motivational Climate in Sport Questionnaire), SMS (Sport Motivation Scale), SSI (Sport Satisfaction and Interest Scale), (PGWB (Perceived General Well-Being Scale); and five items were specifically created to measure self-determinant climate. A structural model with the following sequence: performance and mastery climates → self-determinant climate → need satisfaction → motivation → satisfaction/interest → psychological well-being, was proposed. The model also studied the following relationships: performance and mastery climates → motivation; and need satisfaction and motivation → psychological well-being. Model was analysed with SEM (Structural Equation Modelling). Results verified the hypothesized relationships, and fit indexes of the model were acceptable. Theories of Achievement Motivation and Self-Determination were supporte

Interference pattern in the collision of structures in the BEC dark matter model: comparison with fluids

In order to explore nonlinear effects on the distribution of matter during collisions within the Bose-Einstein condensate (BEC) dark matter model driven by the Schr\"odinger-Poisson system of equations, we study the head-on collision of structures and focus on the interference pattern formation in the density of matter during the collision process. We explore the possibility that the collision of two structures of fluid matter modeled with an ideal gas equation of state also forms interference patterns and found a negative result. Given that a fluid is the most common flavor of dark matter models, we conclude that one fingerprint of the BEC dark matter model is the pattern formation in the density during a collision of structures.Comment: 7 pages, 22 eps figure

Generation of decoherence-free displaced squeezed states of radiation fields and a squeezed reservoir for atoms in cavity QED

We present a way to engineer an effective anti-Jaynes-Cumming and a Jaynes-Cumming interaction between an atomic system and a single cavity mode and show how to employ it in reservoir engineering processes. To construct the effective Hamiltonian, we analyse considered the interaction of an atomic system in a \{Lambda} configuration, driven by classical fields, with a single cavity mode. With this interaction, we firstly show how to generate a decoherence-free displaced squeezed state for the cavity field. In our scheme, an atomic beam works as a reservoir for the radiation field trapped inside the cavity, as employed recently by S. Pielawa et al. [Phys. Rev. Lett. 98, 240401 (2007)] to generate an Einstein-Podolsky-Rosen entangled radiation state in high-Q resonators. In our scheme, all the atoms have to be prepared in the ground state and, as in the cited article, neither atomic detection nor precise interaction times between the atoms and the cavity mode are required. From this same interaction, we can also generate an ideal squeezed reservoir for atomic systems. For this purpose we have to assume, besides the engineered atom-field interaction, a strong decay of the cavity field (i.e., the cavity decay must be much stronger than the effective atom-field coupling). With this scheme, some interesting effects in the dynamics of an atom in a squeezed reservoir could be tested

Accretion of phantom scalar field into a black hole

Using numerical methods we present the first full nonlinear study of phantom scalar field accreted into a black hole. We study different initial configurations and find that the accretion of the field into the black hole can reduce its area down to 50 percent within time scales of the order of few masses of the initial horizon. The analysis includes the cases where the total energy of the space-time is positive or negative. The confirmation of this effect in full nonlinear general relativity implies that the accretion of exotic matter could be considered an evaporation process. We speculate that if this sort of exotic matter has some cosmological significance, this black hole area reduction process might have played a crucial role in black hole formation and population.Comment: 5 revtex pages, 4 eps figures. Minor changes applie

Quinoidization of regioregular oligo(THIENO[3,4-b]THIOPHENE)s

Caracterización de oligotiofenosUniversidad de Málaga. Campus de Excelencia Internacional Andalucía Tec

Spherical Scalar Field Halo in Galaxies

We study a spherically symmetric fluctuation of scalar dark matter in the cosmos and show that it could be the dark matter in galaxies, provided that the scalar field has an exponential potential whose overall sign is negative and whose exponent is constrained observationally by the rotation velocities of galaxies. The local space-time of the fluctuation contains a three dimensional space-like hypersurface with surplus of angle.Comment: 5 REVTeX pages, no figures. Contains important suggestions provided by the referee. Final version, to appear in Phys. Rev.