Search results for "STELLA"
showing 10 items of 1995 documents
First measurement of the 18O(p,α)15N cross section at astrophysical energies
2009
International audience; The 18O(p,α)15N reaction rate has been deduced by means of the Trojan horse method. For the first time the contribution of the 20 keV resonance has been directly evaluated, giving a value about 35% larger than the one in the literature. Moreover, the present approach has allowed to improve the accuracy by a factor 8.5, as it is based on the measured strength instead of spectroscopic measurements. The contribution of the 90 keV resonance has been also determined, which turned out to be of negligible importance to astrophysics.
Temperature dependence of sodium and ionized calcium resonance lines perturbed by helium
2014
International audience; Traces of heavy metals in cool DZ white dwarf stars may be attributed to the accretion of circumstellar dust thought to originate from tidal disruption of rocky parent bodies. Spectra of such stars therefore provide a unique opportunity to study the composition of extrasolar planetary systems. The determination of metal abundances from stellar spectra depends on stellar atmospheric parameters and an accurate prior knowledge of the collision broadening of the line profiles by the most common constituents of the stellar atmosphere. For this purpose, we present theoretical absorption spectra of Na and Ca+ broadened by He for the conditions prevailing in cool white dwarf…
El auto sacramental y la alegorización de la historia: "El socorro de Cádiz" de Juan Pérez de Montalbán
2012
Este trabajo estudia la relación excepcional entre acontecimientos históricos y género sacramental, a partir de un auto que se dio por perdido durante bastantes años. Se trata de El socorro de Cádiz de Juan Pérez de Montalbán en el que se alegoriza la defensa de Cádiz contra los ingleses en 1625. This paper analyzes the exceptional relationship between historical events and the sacramental genre, based on an «auto» that was considered lost during many years. This «auto» is El socorro de Cádiz by Juan Pérez de Montalbán, in which the playwright allegorizes the defense of Cádiz against the English in 1625.
La esclava del cielo, Santa Engracia, una comedia olvidada de Andrés de Claramonte
2009
La esclava del cielo, Santa Engracia, a forgotten play by Andrés de Claramonte Two are the objectives of this paper: in the first place, to elucidate the relationship that exists between the manuscript copy that has been preserved of a play entitled La esclava del cielo, Santa Engracia and the play of the same title that is mentioned in several documents of the 17th Century related to the professional companies of the autores Cristóbal Ortiz, Juan Bautista Valenciano and Juan Jerónimo Valenciano. In the second place, to critically analyze the attribution of La esclava del cielo, Santa Engracia to the playwright Andrés de Claramonte that appears in several of these documents, both by assessi…
«Fue levado mi entendimiento»: Teresa de Cartagena y la escritura mística en femenino
2016
Resumen: En torno a los anos 1470-1475, la religiosa Teresa de Cartagena (sobrina del prestigioso humanista Alonso de Cartagena) deseo y necesito escribir sobre su personal experiencia en femenino del amor divino, y nos lego dos valiosos tratados que abren la senda de los diversos textos compuestos por religiosas castellanas del siglo XVI. La escritora burgalesa destaca meritoriamente en la historia de la literatura bajomedieval y puede considerarse una digna precedente de la gran escritora Teresa de Jesus. Ambas comparten ciertas similitudes biograficas y espirituales que merecen tenerse en cuenta a la hora de disenar una genealogia de autoras de literatura espiritual en lengua castellana.…
Oxygen and the Exploration of the Universe
2010
Humankind has begun, in a tentative way, the immense project of exploring, and perhaps colonizing, other worlds. The grand enterprise has hardly begun and will certainly suffer many defeats and reversals, but it seems destined to go forward. In the course of this, both in seeking life in extraterrestrial environments and voyaging into them, we shall encounter a number of problems concerning the existence or provision of oxygen. The basis for this has been described in previous chapters. First, we would like to summarize arguments as to why life could have evolved on other planets. We need to know what to expect.
Las pullas de Isabel(a) entre Lope y Góngora : modelos, versos y paratextos de 'Virtud, pobreza y mujer'
2021
Este artículo se ha beneficiado de mi participación en los proyectos de investigación PGC2018-094395-BI00, financiado por el Ministerio de Ciencia, Innovación y Universidades, PID2019-104045GB-C54 y PID2019-104045GB-C51, financiados por el Ministerio de Ciencia e Innovación y por fondos FEDER. El presente artículo aborda la relación entre dos comedias: Las firmezas de Isabela, de Luis de Góngora, y Virtud, pobreza y mujer, de Lope de Vega. Tras fijar la fecha de escritura de la segunda, se estipula que fue Lope quien pudo inspirarse en Góngora y no al revés (cuestión discutida), y se aclaran, amplían, matizan o desmienten las huellas de la comedia gongorina atisbadas hasta ahora por la crít…
Overview and accomplishments of the Borexino experiment
2015
International audience; The Borexino experiment is running at the Laboratori del Gran Sasso in Italy since 2007. Its technical distinctive feature is the unprecedented ultralow background of the inner scintillating core, which is the basis of the outstanding achievements accumulated by the experiment. In this talk, after recalling the main features of the detector, the impressive solar data gathered so far by the experiment will be summarized, with special emphasis to the most recent and prominent result concerning the detection of the fundamental pp solar neutrino flux, which is the direct probe of the engine mechanism powering our star. Such a milestone measurement puts Borexino in the un…
Deuterium hyperfine splittings in the rotational spectrum of NH2D as revealed by Lamb-dip spectroscopy
2020
Abstract In the context of radio-astronomical observations, laboratory experiments constitute a cornerstone in the interpretation of rich line surveys due to the concomitant presence of numerous emitting molecules. Here, we report the investigation of three different rotational transitions of mono-deuterated ammonia (NH2D), a species of astrophysical interest, for which the contribution of the deuterium nuclear spin to the rotational spectrum has been resolved for the first time in the millimeter- and submillimeter-wave domain. The effect of hyperfine interactions on the rotational spectrum has been unveiled by a combined theoretical and experimental approach. Quantum-chemical calculations …
Negative and positive feedback from a supernova remnant with SHREC
2022
Supernova remnants (SNRs) contribute to regulate the star formation efficiency and evolution of galaxies. As they expand into the interstellar medium (ISM), they transfer vast amounts of energy and momentum that displace, compress and heat the surrounding material. Despite the extensive work in galaxy evolution models, it remains to be observationally validated to what extent the molecular ISM is affected by the interaction with SNRs. We use the first results of the ESO-ARO Public Spectroscopic Survey SHREC, to investigate the shock interaction between the SNR IC443 and the nearby molecular clump G. We use high sensitivity SiO(2-1) and H$^{13}$CO$^+$(1-0) maps obtained by SHREC together wit…