The Massive Wolf-Rayet Binary SMC WR7

We present a study of optical spectra of the Wolf--Rayet star AzV 336a (= SMC WR7) in the Small Magellanic Cloud. Our study is based on data obtained at several Observatories between 1988 and 2001. We find SMC WR7 to be a double lined WN+O6 spectroscopic binary with an orbital period of 19.56 days. The radial velocities of the He absorption lines of the O6 component and the strong He{\sc ii} emission at $\lambda$4686\AA of the WN component describe antiphased orbital motions. However, they show a small phase shift of $\sim$ 1 day. We discuss possible explanations for this phase shift. The amplitude of the radial velocity variations of He {\sc ii} emission is twice that of the absorption lines. The binary components have fairly high minimum masses, $\sim$ 18 \modot and 34 \modot for the WN and O6 components, respectively.Comment: Accepted by MNRA

Multiwavelength behaviour of the blazar OJ 248 from radio to γ -rays

© 2015 The Authors. We present an analysis of the multiwavelength behaviour of the blazar OJ 248 at z = 0.939 in the period 2006-2013. We use low-energy data (optical, near-infrared, and radio) obtained by 21 observatories participating in the Gamma-Ray Large Area Space Telescope (GLAST)-AGILE Support Program of the Whole Earth Blazar Telescope, as well as data from the Swift (optical-UV and X-rays) and Fermi (γ -rays) satellites, to study flux and spectral variability and correlations among emissions in different bands. We take into account the effect of absorption by the Damped Lyman α intervening system at z = 0.525. Two major outbursts were observed in 2006-2007 and in 2012-2013 at optical and near-IR wavelengths, while in the high-frequency radio light curves prominent radio outbursts are visible peaking at the end of 2010 and beginning of 2013, revealing a complex radio-optical correlation. Crosscorrelation analysis suggests a delay of the optical variations after the γ -ray ones of about a month, which is a peculiar behaviour in blazars. We also analyse optical polarimetric and spectroscopic data. The average polarization percentage P is less than 3 per cent, but it reaches~19 per cent during the early stage of the 2012-2013 outburst.Avague correlation of P with brightness is observed. There is no preferred electric vector polarization angle and during the outburst the linear polarization vector shows wide rotations in both directions, suggesting a complex behaviour/structure of the jet and possible turbulence. The analysis of 140 optical spectra acquired at the Steward Observatory reveals a strong Mg II broad emission line with an essentially stable flux of 6.2 × 10-15 erg cm-2 s-1 and a full width at half-maximum of 2053 km s-1

Multiwavelength behaviour of the blazar OJ 248 from radio to γ-rays

We present an analysis of the multiwavelength behaviour of the blazar OJ 248 at z = 0.939 in the period 2006-2013. We use low-energy data (optical, near-infrared, and radio) obtained by 21 observatories participating in the Gamma-Ray Large Area Space Telescope (GLAST)-AGILE Support Program of the Whole Earth Blazar Telescope, as well as data from the Swift (optical-UV and X-rays) and Fermi (γ-rays) satellites, to study flux and spectral variability and correlations among emissions in different bands. We take into account the effect of absorption by the Damped Lyman α intervening system at z = 0.525. Two major outbursts were observed in 2006-2007 and in 2012-2013 at optical and near-IR wavelengths, while in the high-frequency radio light curves prominent radio outbursts are visible peaking at the end of 2010 and beginning of 2013, revealing a complex radio-optical correlation. Cross-correlation analysis suggests a delay of the optical variations after the γ-ray ones of about a month, which is a peculiar behaviour in blazars. We also analyse optical polarimetric and spectroscopic data. The average polarization percentage P is less than 3 per cent, but it reaches ∼19 per cent during the early stage of the 2012-2013 outburst. A vague correlation of P with brightness is observed. There is no preferred electric vector polarization angle and during the outburst the linear polarization vector shows wide rotations in both directions, suggesting a complex behaviour/structure of the jet and possible turbulence. The analysis of 140 optical spectra acquired at the Steward Observatory reveals a strong Mg II broad emission line with an essentially stable flux of 6.2 × 10- 15 erg cm- 2 s- 1 and a full width at half-maximum of 2053 km s- 1

El Derecho Argentino frente a la pandemia y post-pandemia COVID-19. TOMO II

La Facultad de Derecho de la Universidad Nacional de Córdoba no podía permanecer indolente frente a la conmoción que, durante este año 2020, ha provocado en el mundo la pandemia de COVID-19. Como comunidad educativa advertíamos que la prioridad máxima era lograr la continuidad de la labor de nuestra Casa de Estudios, para garantizar a nuestros alumnos del grado y del posgrado, el ejercicio de su derecho a estudiar, continuando y en algunos casos iniciando sus estudios, a pesar de las condiciones adversas que se vivían. Con esa finalidad convocamos a los profesores titulares de todas las cátedras y eméritos y consultos que quisieran hacerlo, a sumarse con sus aportes a esta construcción colectiva, que aborda los temas que nos ocupan desde las diversas perspectivas de las distintas áreas del mundo jurídico. Y la desinteresada respuesta positiva no se hizo esperar. Prueba de ello es este libro cuyas dimensiones, tanto en lo cuantitativo como en lo cualitativo, superaron las expectativas iniciales. La jerarquía de los autores que generosamente han participado con sus contribuciones, en algunos casos en forma individual y en otros acompañados por sus equipos de colaboradores, permiten prever que esta obra ha de brindar elementos de juicio de gran utilidad para continuar construyendo el mundo jurídico, dentro de la pandemia y después de ella.ÍNDICE GENERAL. TOMO II. DERECHO CONSTITUCIONAL. "Emergencias, orden constitucional y COVID-19 en Argentina" por Antonio María Hernández. "Una constitución para todas las épocas. Algunas notas sobre el Derecho Constitucional en tiempo de pandemia" por Guillermo E. Barrera Buteler, Magdalena I. Álvarez, José M. Pérez Corti y Victorino Solá. Pandemia y constitución en la Argentina actual. Reflexiones desde la Cátedra “B” de Derecho Constitucional Facultad de Derecho. Universidad Nacional de Córdoba. I. Introducción. Breves comentarios sobre este texto y “lo constitucional” en los tiempos actuales en Argentina por Andrés Rossetti. II. Nociones sobre el Cuidado y el Modo de Ser en el Mundo por Marta Faur. III. Impacto de la pandemia en la dicotomía público/privado en Argentina por Claudio E. Guiñazú. IV. Preocupaciones constitucionales en tiempos de pandemia: desigualdad y emergencia. La necesidad de repensar los mecanismos decisorios por Romina Verri. V. Derechos laborales y gremiales de los trabajadores estatales durante la emergencia sanitaria por Félix A. López Amaya. VI. La coordinación intergubernamental frente al COVID-19 en experiencias de países federales por Marcelo Bernal. "Cuando el centro está afuera de la figura. -República, desequilibrio de poderes y emergencia-" por Pablo Riberi. "Pandemia y estado de excepción" por Miguel Ángel Ortiz Pellegrini. DERECHO PENAL. "La emergencia sanitaria en contextos de encierro carcelario" por Carlos Julio Lascano. "COVID-19 y cárceles argentinas" por Gustavo A. Arocena. DERECHO INTERNACIONAL PUBLICO. "La confrontación entre Estados Unidos de América y China en tiempos de COVID-19 y el Derecho Internacional Público" por Zlata Drnas de Clément. "El rol del principio de cooperación internacional durante la pandemia y en el período post-COVID 19" por María Alejandra Sticca. "COVID-19, crímenes internacionales y amenazas a la paz: ¿integran las pandemias el ámbito material de la responsabilidad de proteger?" por Luciano Pezzano. "Incidencia de la pandemia covid 19 en derechos fundamentales. Las organizaciones internacionales y la seguridad de los estados" por Christian G. Sommer, María Pilar Llorens, Oscar Benítez y Guillermo Costilla. DERECHO INTERNACIONAL PRIVADO. "El COVID-19 y la cooperación jurídica internacional" por Adriana Dreyzin de Klor. "El COVID-19 y las nuevas formas de celebración del matrimonio" por Carlos E. Echegaray de Maussion. "Pandemia y solicitudes de retorno de menores por traslados ilícitos en sustracción de niños: ¿es la COVID-19 una excepción de riesgo grave?" por Myriam Diana Lucero. "Justicia, aislamiento y videoconferencia la experiencia del Derecho Internacional Privado en desandar barreras: guía de buenas prácticas de la conferencia de La Haya 2019" por Carolina Harrington. "Restitución internacional de niños. La excepción de grave riesgo y COVID-19" por Laura Martina Jeifetz. "El Derecho Internacional Privado y el desafío frente a los grupos más vulnerables en el marco del COVID-19" por Cristina Britos. "La responsabilidad social empresaria de las empresas multinacionales como herramienta para enfrentar la pandemia COVID-19" por Candela Noelia Villegas. DERECHO ADMINISTRATIVO. "Los deberes cívicos frente a la pandemia COVID 19" por José Luis Palazzo. "Importancia del rol y la gestión del Poder Judicial en tiempos de coronavirus – COVID-19" por Domingo J. Sesin y Daniela S. Sosa. DERECHO DEL TRABAJO Y DE LA SEGURIDAD SOCIAL. "Las relaciones laborales en la emergencia" por Carlos Alberto Toselli.Fil: Hernández, Antonio María. Universidad Nacional de Córdoba. Facultad de Derecho; Argentina.Fil: Barrera Buteler, Guillermo Eduardo. Universidad Nacional de Córdoba. Facultad de Derecho; Argentina.Fil: Álvarez, Magdalena I. Universidad Nacional de Córdoba. Facultad de Derecho; Argentina.Fil: Pérez Corti, José M. Universidad Nacional de Córdoba. Facultad de Derecho; Argentina.Fil: Solá, Victorino. Universidad Nacional de Córdoba. Facultad de Derecho; Argentina.Fil: Rossetti, Andrés. Universidad Nacional de Córdoba. Facultad de Derecho; Argentina.Fil: Faur, Marta. Universidad Nacional de Córdoba. Facultad de Derecho; Argentina.Fil: Guiñazú, Claudio E. Universidad Nacional de Córdoba. Facultad de Derecho; Argentina.Fil: Verri, Romina. Universidad Nacional de Córdoba. Facultad de Derecho; Argentina.Fil: López Amaya, Félix A. Universidad Nacional de Córdoba. Facultad de Derecho; Argentina.Fil: Bernal, Marcelo. Universidad Nacional de Córdoba. Facultad de Derecho; Argentina.Fil: Bernal, Marcelo. Universidad Nacional de Córdoba. Facultad de Ciencias Sociales. Centro de Estudios Avanzados; Argentina.Fil: Riberi, Pablo. Universidad Nacional de Córdoba. Facultad de Derecho; Argentina.Fil: Ortiz Pellegrini, Miguel Ángel. Universidad Nacional de Córdoba. Facultad de Derecho; Argentina.Fil: Lascano, Carlos Julio. Universidad Nacional de Córdoba. Facultad de Derecho; Argentina.Fil: Arocena, Gustavo A. Universidad Nacional de Córdoba. Facultad de Derecho; Argentina.Fil: Drnas de Clément, Zlata. Universidad Nacional de Córdoba. Facultad de Derecho; Argentina.Fil: Sticca, María Alejandra. Universidad Nacional de Córdoba. Facultad de Derecho; Argentina.Fil: Pezzano, Luciano. Universidad Nacional de Córdoba. Facultad de Derecho; Argentina.Fil: Universidad Nacional de Córdoba. Facultad de Ciencias Sociales; Argentina.Fil: Sommer, Christian G. Universidad Nacional de Córdoba. Facultad de Derecho; Argentina.Fil: Sommer, Christian G. Universidad Católica de Córdoba. Facultad de Derecho. Instituto de Derechos Humanos; Argentina.Fil: Llorens, María Pilar. Universidad Nacional de Córdoba. Facultad de Derecho; Argentina.Fil: Benítez, Oscar. Universidad Nacional de Córdoba. Facultad de Derecho; Argentina.Fil: Costilla, Guillermo. Universidad Nacional de Córdoba. Facultad de Derecho; Argentina.Fil: Salas, Graciela R. Universidad Nacional de Córdoba. Facultad de Derecho; Argentina.Fil: Mortarotti, Pablo César. Universidad Nacional de Córdoba. Facultad de Derecho; Argentina.Fil: Mortarotti, Pablo César. Universidad Católica de Córdoba; Argentina.Fil: Mortarotti, Pablo César. Universidad Siglo 21; Argentina.Fil: Dreyzin de Klor, Adriana. Universidad Nacional de Córdoba. Facultad de Derecho; Argentina.Fil: Dreyzin de Klor, Adriana. Universidad Blas Pascal; Argentina.Fil: Lucero, Myriam Diana. Universidad Nacional de Córdoba. Facultad de Derecho; Argentina.Fil: Harrington, Carolina. Universidad Nacional de Córdoba. Facultad de Derecho; Argentina.Fil: Jeifetz, Laura Martina. Universidad Nacional de Córdoba. Facultad de Derecho; Argentina.Fil: Britos, Cristina. Universidad Nacional de Córdoba. Facultad de Derecho; Argentina.Fil: Villegas, Candela Noelia. Universidad Nacional de Córdoba. Facultad de Derecho; Argentina.Fil: Villegas, Candela Noelia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Córdoba; Argentina.Fil: Zavatti, Adriana M. Universidad Nacional de Córdoba. Facultad de Derecho; Argentina.Fil: Bottiglieri, María G. Universidad Nacional de Córdoba. Facultad de Derecho; Argentina.Fil: Fernández, Flavia. Universidad Nacional de Córdoba. Facultad de Derecho; Argentina.Fil: Gordillo Reinalde, Laura Andrea. Universidad Nacional de Córdoba. Facultad de Derecho; Argentina.Fil: Palazzo, José Luis. Universidad Nacional de Córdoba. Facultad de Derecho; Argentina.Fil: Sesin, Domingo J. Universidad Nacional de Córdoba. Facultad de Derecho; Argentina.Fil: Sosa, Daniela S. Universidad Nacional de Córdoba. Facultad de Derecho; Argentina.Fil: Giménez, Laura E. Universidad Nacional de Córdoba. Facultad de Derecho; Argentina.Fil: Tello Roldan, María Cecilia. Universidad Nacional de Córdoba. Facultad de Derecho; Argentina.Fil: Toselli, Carlos Alberto. Universidad Nacional de Córdoba. Facultad de Derecho; Argentina.Fil: Echegaray de Maussion, Carlos E. Universidad Nacional de Córdoba. Facultad de Derecho; Argentina

Dietary α‐Linolenic Acid, Marine ω‐3 Fatty Acids, and Mortality in a Population With High Fish Consumption: Findings From the PREvención con DIeta MEDiterránea (PREDIMED) Study

Background: Epidemiological evidence suggests a cardioprotective role of α‐linolenic acid (ALA), a plant‐derived ω‐3 fatty acid. It is unclear whether ALA is beneficial in a background of high marine ω‐3 fatty acids (long‐chain n‐3 polyunsaturated fatty acids) intake. In persons at high cardiovascular risk from Spain, a country in which fish consumption is customarily high, we investigated whether meeting the International Society for the Study of Fatty Acids and Lipids recommendation for dietary ALA (0.7% of total energy) at baseline was related to all‐cause and cardiovascular disease mortality. We also examined the effect of meeting the society's recommendation for long‐chain n‐3 polyunsaturated fatty acids (≥500 mg/day). Methods and Results: We longitudinally evaluated 7202 participants in the PREvención con DIeta MEDiterránea (PREDIMED) trial. Multivariable‐adjusted Cox regression models were fitted to estimate hazard ratios. ALA intake correlated to walnut consumption (r=0.94). During a 5.9‐y follow‐up, 431 deaths occurred (104 cardiovascular disease, 55 coronary heart disease, 32 sudden cardiac death, 25 stroke). The hazard ratios for meeting ALA recommendation (n=1615, 22.4%) were 0.72 (95% CI 0.56–0.92) for all‐cause mortality and 0.95 (95% CI 0.58–1.57) for fatal cardiovascular disease. The hazard ratios for meeting the recommendation for long‐chain n‐3 polyunsaturated fatty acids (n=5452, 75.7%) were 0.84 (95% CI 0.67–1.05) for all‐cause mortality, 0.61 (95% CI 0.39–0.96) for fatal cardiovascular disease, 0.54 (95% CI 0.29–0.99) for fatal coronary heart disease, and 0.49 (95% CI 0.22–1.01) for sudden cardiac death. The highest reduction in all‐cause mortality occurred in participants meeting both recommendations (hazard ratio 0.63 [95% CI 0.45–0.87]). Conclusions: In participants without prior cardiovascular disease and high fish consumption, dietary ALA, supplied mainly by walnuts and olive oil, relates inversely to all‐cause mortality, whereas protection from cardiac mortality is limited to fish‐derived long‐chain n‐3 polyunsaturated fatty acids. Clinical Trial Registration URL: http://www.Controlled-trials.com/. Unique identifier: ISRCTN35739639

Products obtained from "Climate and human stressors on global penguin hotspots: current assessments for future conservation"

Products obtained from the publication "Climate and human stressors on global penguin hotspots: current assessments for future conservation". It contains the hotspots produced for the diferent penguin species and the layers of the diferent threats.Peer reviewe

Climate and human impacts on global penguin hotspots: current assessments for conservation

11th International Penguin Conference, 4-9 September 2023, Viña del Mar, ChilePenguins are considered as one of the most threatened groups of seabirds a deserve conservation priority. However, there is a lack of a reliable, comprehensive, and systematic effort aimed at providing quantitative, spatially-explicit assessments on the multiple threats that the Wold’s 18 penguin species are facing. That is what we have done in this work, by combining the most spatially-resolved information on the global penguin distributions (based on > 800.000 penguin occurrences available in GBIF) with that for their main threats: climate-driven environmental changes at sea, industrial fisheries, and human disturbances on land. Our analyses reveal that the areas that accumulate more threats for penguins concentrate in coastal regions within temperate areas; particularly in the coast of Peru, the Patagonian shelf, the Benguela upwelling region and the Australian and New Zealand coasts. When weighting these potential pressures with species-specific vulnerabilities, species such as Spheniscus humboldti, Spheniscus demersus and Pygoscelis antarcticus emerge as the ones under the highest pressure. However, all these potential threats are uneven distributed spatially, even within species distribution ranges, so contrasting pressures expected among populations within species. Our approach explicitly differentiates between climate and human pressures, since the more achievable management of local anthropogenic pressures (e.g., fisheries and land-based threats) may provide suitable means for ameliorating cumulative impacts and maintaining penguins within a “Safe Operating Space”, where they may remain resilient to global process such as climate changePeer reviewe

XX. CoRoT-20b: A very high density, high eccentricity transiting giant planet

We report the discovery by the CoRoT space mission of a new giant planet, CoRoT-20b. The planet has a mass of 4.24 +/- 0.23 MJ and a radius of 0.84 +/- 0.04 RJ. With a mean density of 8.87 +/- 1.10 g/cm^3, it is among the most compact planets known so far. Evolution models for the planet suggest a mass of heavy elements of the order of 800 ME if embedded in a central core, requiring a revision either of the planet formation models or of planet evolution and structure models. We note however that smaller amounts of heavy elements are expected from more realistic models in which they are mixed throughout the envelope. The planet orbits a G-type star with an orbital period of 9.24 days and an eccentricity of 0.56. The star's projected rotational velocity is vsini = 4.5 +/- 1.0 km/s, corresponding to a spin period of 11.5 +/- 3.1 days if its axis of rotation is perpendicular to the orbital plane. In the framework of Darwinian theories and neglecting stellar magnetic breaking, we calculate the tidal evolution of the system and show that CoRoT-20b is presently one of the very few Darwin-stable planets that is evolving towards a triple synchronous state with equality of the orbital, planetary and stellar spin periods