910 research outputs found
La claror ordenada dels mots d'Espriu, segons Maria Àngels Anglada (La gènesi d'un poema)
No full textThis study analyzes the presence of Salvador Espriu in the work of Maria Àngels Anglada and the common features that the author establishes between Espriu and Prometheus, the hero of the tragedy of Aeschylus. Along with Jacint Verdaguer, Espriu is a reference point for Maria Àngels Anglada
Comment on "Stellar activity masquerading as planets in the habitable zone of the M dwarf Gliese 581"
No full textAnglada-Escudé, Guillem, and Mikko Tuomi. "Comment on “Stellar activity masquerading as planets in the habitable zone of the M dwarf Gliese 581”." Science 347.6226 (2015): 1080-1080
Up to four planets around the M dwarf GJ 163
No full textContext. Exoplanet Doppler surveys are currently the most efficient means to detect low-mass companions to nearby stars. Among these stars, the light M dwarfs provide the highest sensitivity to detect low-mass exoplanet candidates. Evidence is accumulating that a substantial fraction of these low-mass planets are found in high-multiplicity planetary systems. GJ 163 is a nearby inactive M dwarf with abundant public observations obtained using the HARPS spectrograph.
Aims. We obtain and analyse radial velocities from the HARPS public spectra of GJ 163 and investigate the presence of a planetary companions orbiting it. The number of planet candidates detected might depend on some prior assumptions. Since the impact of prior choice has not been investigated throughly previously, we study the effects of different prior densities on the detectability of planet candidates around GJ 163.
Methods. We use Bayesian tools, i.e. posterior samplings and model comparisons, when analysing the GJ 163 velocities. We consider models accounting for the possible correlations of subsequent measurements. We also search for activity-related counterparts of the signals we observe and test the dynamical stability of the planetary systems corresponding to our solutions using direct numerical integrations of the orbits.
Results. We find that there are at least three planet candidates orbiting GJ 163. The existence of a fourth planet is supported by the data but the evidence in favor of the corresponding model is not yet conclusive. The second innermost planet candidate in the system with an orbital period of 25.6 days and a minimum mass of 8.7 M⊕ is inside the liquid-water habitable zone of the star.
Conclusions. The architecture of GJ 163 system resembles a scaled-down Solar System in the sense that there are two low-mass planets on orbital periods of 8.7 and 25.6 days in the inner system, a possible slightly more massive companion on an intermediate orbit, and an outer sub-Saturnian companion at roughly 1 AU. The discovery of (yet) another planetary system with several low-mass companions around a nearby M-dwarf indicates that the high-multiplicity planetary systems found by the NASA Kepler mission around G and K dwarfs is also present (possibly even reinforced) around low-mass stars
Els referents clàssics en l'obra de Maria Àngels Anglada : Una lectura de Sandàlies d'escuma
No full textMaria Àngels Anglada s'inscriu en la tradició d'una mena d'escriptors que segueixen i forgen tradició literària. En aquest sentit, la seva obra és deutora de la cultura grega segons els paràmetres de la poètica de la mimesi. Aquest fet és prou evident en la novel·laMaria Àngels Anglada se inscribe en la tradición de un tipo de escritores que siguen y forjan la tradición literaria. En este sentido, su obra se debe a la cultura griega según los parámetros de la poética de la mímesis. Este hecho es suficientemente evidente en la novelaMaria Àngels Anglada is part of the tradition of a sort of writer that follows and forges literary tradition. In this sense, her work owes a debt to Greek culture according to the parameters of poetry of mime. This is clear in her novel Sandàlies d'escuma, in which the author follows the parameters of the Homeric and Virgilian epic tradition
Els referents clàssics en l'obra de Maria Àngels Anglada : Una lectura de Sandàlies d'escuma
No full textMaria Àngels Anglada s'inscriu en la tradició d'una mena d'escriptors que segueixen i forgen tradició literària. En aquest sentit, la seva obra és deutora de la cultura grega segons els paràmetres de la poètica de la mimesi. Aquest fet és prou evident en la novel·laMaria Àngels Anglada se inscribe en la tradición de un tipo de escritores que siguen y forjan la tradición literaria. En este sentido, su obra se debe a la cultura griega según los parámetros de la poética de la mímesis. Este hecho es suficientemente evidente en la novelaMaria Àngels Anglada is part of the tradition of a sort of writer that follows and forges literary tradition. In this sense, her work owes a debt to Greek culture according to the parameters of poetry of mime. This is clear in her novel Sandàlies d'escuma, in which the author follows the parameters of the Homeric and Virgilian epic tradition
A planetary system with gas giants and super-Earths around the nearby M dwarf GJ 676A
No full textContext. Several M dwarfs are targets of systematical monitoring in
searches for Doppler signals caused by low-mass exoplanet companions. As a result, an
emerging population of high-multiplicity planetary systems around low-mass stars are being
detected as well.
Aims. We optimize classic data analysis methods and develop new ones to
enhance the sensitivity towards lower amplitude planets in high-multiplicity systems. We
apply these methods to the public HARPS observations of GJ 676A, a nearby and relatively
quiet M dwarf with one reported gas giant companion.
Methods. We rederived Doppler measurements from public HARPS spectra
using the recently developed template matching method (HARPS-TERRA software). We used
refined versions of periodograms to assess the presence of additional low-mass companions.
We also analysed the same dataset with Bayesian statistics tools and compared the
performance of both approaches.
Results. We confirm the already reported massive gas giant candidate and
a long period trend in the Doppler measurements. In addition to that, we find very secure
evidence in favour of two new candidates in close-in orbits and masses in the super-Earth
mass regime. Also, the increased time-span of the observations allows the detection of
curvature in the long-period trend. suggesting the presence of a massive outer companion
whose nature is still unclear.
Conclusions. Despite the increased sensitivity of our new periodogram
tools, we find that Bayesian methods are significantly more sensitive and reliable in the
early detection of candidate signals, but more work is needed to quantify their robustness
against false positives. While hardware development is important in increasing the Doppler
precision, development of data analysis techniques can help to reveal new results from
existing data sets with significantly fewer resources. This new system holds the record of
minimum-mass range (from
Msini ~ 4.5 M ⊕
to 5 Mjup) and period range
(from P ~ 3.6 days to more than 10 years). Although all planet candidates
are substantially more massive, it is the first exoplanetary system with a general
architecture similar to our solar system. GJ 676A can be happily added to the family of
high-multiplicity planetary systems around M dwarfs
A BCool magnetic snapshot survey of solar-type stars
No full textSVJ acknowledges research funding by the Deutsche Forschungsgemeinschaft (DFG) under grant SFB 963/1, project A16. JM was funded by a fellowship of the Alexander von Humboldt Foundation in Göttingen. RF acknowledges funding from the STFC.We present the results of a major high-resolution spectropolarimetric BCool project magnetic survey of 170 solar-type stars. Surface magnetic fields were detected on 67 stars, with 21 classified as mature solar-type stars, a result that increases by a factor of 4 the number of mature solar-type stars on which magnetic fields have been observed. In addition, a magnetic field was detected for 3 out of 18 of the subgiant stars surveyed. For the population of K-dwarfs, the mean value of |Bl| (|Bl|mean) was also found to be higher (5.7 G) than |Bl|mean measured for the G-dwarfs (3.2 G) and the F-dwarfs (3.3 G). For the sample as a whole, |Bl|mean increases with rotation rate and decreases with age, and the upper envelope for |Bl| correlates well with the observed chromospheric emission. Stars with a chromospheric S-index greater than about 0.2 show a high magnetic field detection rate and so offer optimal targets for future studies. This survey constitutes the most extensive spectropolarimetric survey of cool stars undertaken to date, and suggests that it is feasible to pursue magnetic mapping of a wide range of moderately active solar-type stars to improve our understanding of their surface fields and dynamos.Peer reviewe
Título: Una mirada retrospectiva.
No full textCopia digital. España : Ministerio de Cultura. Subdirección General de Coordinación Bibliotecaria, 2024Barcelona antiga en lo sigle XIX / per Francisco Anglada ; Barcelona de 1820 a 1840 / per G. Vidal de Valenciano ; Una mirada retrospectiva / per Gayetà Cornet y Ma
Doctrina del estoico filosofo Epicleto : que se llama conmunmente Enchiridion
No full textColofónEn [calderón] consta que paga la obra D. Alvaro CarvajalSign.: [calderón], A-G, H<5
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