Uma vela de fé

Entre a multidão que assistia à missa de Pentecostes estavamos Roseana, Marly e eu.

Artistas españoles exiliados en el Caribe: el caso de la República Dominicana y Vela Zanetti

Hemos realizado un estudio analítico del exilio artístico español en El Caribe, principalmente en la República Dominicana, con especial énfasis en las relaciones artísticas y culturales que establecieron los refugiados. Se trata de una contribución, a través de la figura de José Vela Zanetti, al exilio artístico español en Latinoamérica partiendo de la hipótesis de que la proyección creativa de estos artistas y las circunstancias históricas que los acompañaron, determinaron su obra e impactaron en la trayectoria del arte de los países de acogida. El objetivo general de esta tesis es el análisis de la producción artística de los españoles exiliados en Cuba, Puerto Rico y República Dominicana, con especial atención al caso dominicano y la figura del pintor José Vela Zanetti. Otro de los objetivos de esta investigación consiste en el estudio del vínculo de los artistas exiliados con las sociedades receptoras y sus relaciones con el colectivo de inmigrantes establecido en cada una de ellas. En este sentido, podemos determinar las redes artísticas que se tejieron en base a la participación de los creadores españoles en la vida cultural de los países de destino. Por último, tomaremos como caso de estudio la figura del artista burgalés José Vela Zanetti, cuyo paso por la República Dominicana dejó una profunda huella en el imaginario artístico del país. Hemos seleccionado a este pintor por su interesante trayectoria muralística en la isla dominicana y en otros países hispanoamericanos por los que peregrinó. Para llevar a cabo los objetivos propuestos en esta investigación, se ha establecido una metodología centrada en ofrecer una visión panorámica del exilio en El Caribe, hasta llegar al caso concreto de cada artista. Por tanto, ha sido fundamental la aproximación a cada uno de los contextos políticos, sociales y culturales que enmarcaron y condicionaron la producción artística de los creadores españoles. En este estudio hemos tenido en cuenta gran variedad de fuentes, desde una recopilación sistemática de la bibliografía propia del tema, hasta la consideración de fuentes documentales más concretas sin obviar las propias obras de arte como fuente esencial de estudio. Entre las fuentes primarias hemos incluido las publicaciones especializadas (actas de congresos, publicaciones científicas, publicaciones monográficas y catálogos de exposiciones), junto con las fuentes hemerográficas y epistolares. Éstas comprenden artículos de opinión, reportajes de exposiciones, correspondencia, críticas y fotografías aparecidas en prensa...

The accretion environment in Vela X-1 during a flaring period using XMM-Newton

We present analysis of 100 ks contiguous XMM-Newton data of the prototypical wind accretor Vela X-1. The observation covered eclipse egress between orbital phases 0.134 and 0.265, during which a giant flare took place, enabling us to study the spectral properties both outside and during the flare. This giant flare with a peak luminosity of 3.92+0.42-0.09 × 1037 erg s-1 allows estimates of the physical parameters of the accreted structure with a mass of ~1021 g. We have been able to model several contributions to the observed spectrum with a phenomenological model formed by three absorbed power laws plus three emission lines. After analysing the variations with orbital phase of the column density of each component, as well as those in the Fe and Ni fluorescence lines, we provide a physical interpretation for each spectral component. Meanwhile, the first two components are two aspects of the principal accretion component from the surface of the neutron star, the third component seems to be the X-ray light echo formed in the stellar wind of the companion.

Probing large-scale wind structures in Vela X–1 using off-states with INTEGRAL

Vela X–1 is the prototype of the class of wind-fed accreting pulsars in high-mass X-ray binaries hosting a supergiant donor. We have analysed in a systematic way 10 years of INTEGRAL data of Vela X–1 (22–50 keV) and we found that when outside the X-ray eclipse, the source undergoes several luminosity drops where the hard X-rays luminosity goes below ∼3 × 1035 erg s−1, becoming undetected by INTEGRAL. These drops in the X-ray flux are usually referred to as ‘off-states’ in the literature. We have investigated the distribution of these off-states along the Vela X–1 ∼ 8.9 d orbit, finding that their orbital occurrence displays an asymmetric distribution, with a higher probability to observe an off-state near the pre-eclipse than during the post-eclipse. This asymmetry can be explained by scattering of hard X-rays in a region of ionized wind, able to reduce the source hard X-ray brightness preferentially near eclipse ingress. We associate this ionized large-scale wind structure with the photoionization wake produced by the interaction of the supergiant wind with the X-ray emission from the neutron star. We emphasize that this observational result could be obtained thanks to the accumulation of a decade of INTEGRAL data, with observations covering the whole orbit several times, allowing us to detect an asymmetric pattern in the orbital distribution of off-states in Vela X–1.

Measuring the stellar wind parameters in IGR J17544-2619 and Vela X-1 constrains the accretion physics in supergiant fast X-ray transient and classical supergiant X-ray binaries

Context. Classical supergiant X-ray binaries (SGXBs) and supergiant fast X-ray transients (SFXTs) are two types of high-mass X-ray binaries (HMXBs) that present similar donors but, at the same time, show very different behavior in the X-rays. The reason for this dichotomy of wind-fed HMXBs is still a matter of debate. Among the several explanations that have been proposed, some of them invoke specific stellar wind properties of the donor stars. Only dedicated empiric analysis of the donors’ stellar wind can provide the required information to accomplish an adequate test of these theories. However, such analyses are scarce. Aims. To close this gap, we perform a comparative analysis of the optical companion in two important systems: IGR J17544-2619 (SFXT) and Vela X-1 (SGXB). We analyze the spectra of each star in detail and derive their stellar and wind properties. As a next step, we compare the wind parameters, giving us an excellent chance of recognizing key differences between donor winds in SFXTs and SGXBs. Methods. We use archival infrared, optical and ultraviolet observations, and analyze them with the non-local thermodynamic equilibrium (NLTE) Potsdam Wolf-Rayet model atmosphere code. We derive the physical properties of the stars and their stellar winds, accounting for the influence of X-rays on the stellar winds. Results. We find that the stellar parameters derived from the analysis generally agree well with the spectral types of the two donors: O9I (IGR J17544-2619) and B0.5Iae (Vela X-1). The distance to the sources have been revised and also agree well with the estimations already available in the literature. In IGR J17544-2619 we are able to narrow the uncertainty to d = 3.0 ± 0.2 kpc. From the stellar radius of the donor and its X-ray behavior, the eccentricity of IGR J17544-2619 is constrained to e< 0.25. The derived chemical abundances point to certain mixing during the lifetime of the donors. An important difference between the stellar winds of the two stars is their terminal velocities (ν∞ = 1500 km s-1 in IGR J17544-2619 and ν∞ = 700 km s-1 in Vela X-1), which have important consequences on the X-ray luminosity of these sources. Conclusions. The donors of IGR J17544-2619 and Vela X-1 have similar spectral types as well as similar parameters that physically characterize them and their spectra. In addition, the orbital parameters of the systems are similar too, with a nearly circular orbit and short orbital period. However, they show moderate differences in their stellar wind velocity and the spin period of their neutron star which has a strong impact on the X-ray luminosity of the sources. This specific combination of wind speed and pulsar spin favors an accretion regime with a persistently high luminosity in Vela X-1, while it favors an inhibiting accretion mechanism in IGR J17544-2619. Our study demonstrates that the relative wind velocity is critical in class determination for the HMXBs hosting a supergiant donor, given that it may shift the accretion mechanism from direct accretion to propeller regimes when combined with other parameters.

A vela adaptada no Clube Naval do Funchal

O presente documento é um relatório da atividade profissional realizada no Clube Naval do Funchal (CNF) e insere-se no âmbito do mestrado em Atividade Física e Desporto, realizado enquanto aluno da Universidade da Madeira, focado sobre o desempenho, ações, funções e demais iniciativas levadas a cabo nos últimos cinco anos no CNF, tendo como tema principal a “Vela Adaptada” (VA) no CNF. Esta análise e reflexão crítica ao trabalho desenvolvido serão suportadas através das experiências e vivências próprias. A vela adaptada é um desporto recente na cena nacional e regional. Nos dias de hoje, a responsabilidade humana e social de cada um de nós determina que tenhamos o dever ético e moral de criar condições de inclusão às pessoas portadoras de deficiência, possibilitando e facilitando a superação de barreiras sociais que estão enraizadas em todos nós, bem como ajudando à mitigação dos constrangimentos no seu dia a dia. Por essa via, melhoramos a sua qualidade de vida e conferimos-lhes maior autonomia, sendo a atividade física adaptada uma das formas possíveis. Este desporto adaptado tem crescido nos últimos anos, fruto do surgimento de meios tecnológicos apropriados, digam-se embarcações que oferecem todas as garantias de sucesso no ensino aprendizagem desta variante da vela. Desta forma, a inclusão social e o desenvolvimento da vela adaptada oferecem e possibilitam a realização de atividades físicas de forma mais corrente, normal e, acima de tudo, segura. Este trabalho é um exemplo do papel social e inclusivo feito através da implementação de um desporto náutico, neste caso da vela adaptada, como forma de minimizar as assimetrias existentes neste âmbito social.

Juana de Arco : (nóvela de la niñez abandonada) /

Mode of access: Internet.

Noticias históricas y descriptivas sobre el gran país del Chaco y río Bermejo; con observaciones relativas á un plan de navegación y colonización que se propone.

"Memoria sobre los ríos navegables que fluyen al Marañon, procedentes de las cordilleras del Perú y Bolivia. Por el Señor D. Tadeo Haënke": p. 393-415.

Consideraciones sobre el comercio y la navegación de la Gran-Bretaña /

Mode of access: Internet.

D. D. Josephi Vela de Oreña... Dissertationum juris controversi tam in Hispalensi quam Granatense senatu super materias tam ecclesiasticas quam civilis tomus primus...

Portada a dos tintas con grabado xilográfico.

D.D. Josephi Vela de Oreña ... dissertationum juris controversi tam in Hispalensi quam Granatensi senatu super materias tam ecclesiasticas quam civiles tomus secundus ...

Mode of access: Internet.

[El origen y progresos de los instrumentos de astronomía y geodesia] : discursos leídos ante la Real Academia de Ciencias Exactas, Físicas y Naturales en la recepción pública del Señor D. Carlos Ibáñez e Ibáñez ; [contestación al discurso anterior por Antonio Aguilar y Vela]

Mode of access: Internet.

D.D. Josephi Vela de Oreña ... Dissertationum juris controversi tam in Hispalensi, quam Granatensi, senatu, super materias tam ecclesiasticas quàm civiles : tomus secundus ... /

Contiene: D.D. Josephi Vela de Oreña Disputationes forenses et Scholasticae sive III. Praelectiones Salmanticenses (p. 285-362); S. Rotae Romanae decisiones recentissimae, nunquam antea in lucem editae, materiam dissertationum juris controversi (pág. propia)

Trigonometria aplicada a la navegación : assi por el beneficio de las Tablas de los Senos, y Tangentes Logarithmicas, como por el vso de las dos Escalas Plana, y Artificial /

Mode of access: Internet.