Distribución de polvo interestelar a pequeña escala de distancias

Se presenta un modelo estático, compuesto por nubes de simetría esférica, que permite ajustar el exceso de color medio y la dispersión de excesos de color observados para el cúmulo abierto NGC 2516 (CO 757-607). Las nubes poseed un perfil de densidad alto dado por: ρ(r)=ρ₀ exp(-r/r₀)² en la cual r es la distancia desde el centro de la nube, r₀ el radio típico y ρ₀ la densidad central de la misma.Asociación Argentina de Astronomí

Optical followup of galaxy clusters detected by the South Pole Telescope

The South Pole Telescope (SPT) is a 10 meter telescope operating at mm wavelengths. It has recently completed a three-band survey covering 2500 sq. degrees. One of the survey's main goals is to detect galaxy clusters using Sunyaev-Zeldovich effect and use these clusters for a variety of cosmological and astrophysical studies such as the dark energy equation of state, the primordial non-gaussianity and the evolution of galaxy populations. Since 2005, we have been engaged in a comprehensive optical and near-infrared followup program (at wavelengths between 0.4 and 5 {\mu}m) to image high-significance SPT clusters, to measure their photometric redshifts, and to estimate the contamination rate of the candidate lists. These clusters are then used for various cosmological and astrophysical studies.Comment: For TAUP 2011 proceeding

A Framework for Improving the Energy Efficiency and Sustainability of Collaborative Robots

On a worldwide scale, industry is responsible for a large part for the overall use of energy and resources: reducing this use is included in the targets of SDG9, one of the Sustainable Development Goals drawn by the United Nations. This work aims to create a framework for better understanding, modelling, and optimizing the energy consumption of industrial robots, with specific reference to the collaborative robot UR5e. The framework comprises a real robot and its electro-dynamic model, the latter being developed on the basis of experimental tests and of data supplied by the manufacturer. The paper presents the main features of the framework, and the future work aimed at improving the accuracy of the proposed energy model