Search results for "Planets"
showing 10 items of 47 documents
Analysis of the planetary mass uncertainties on the accuracy of atmospherical retrieval
2023
Characterising the properties of exoplanet atmospheres relies on several interconnected parameters, which makes it difficult to determine them independently. Planetary mass plays a role in determining the scale height of atmospheres, similarly to the contribution from the average molecular weight of the gas. We investigate the relevance of planetary mass knowledge in spectral retrievals, identifying cases where mass measurements are needed for clear or cloudy and primary or secondary atmospheres, along with the relevant precision, in the context of the ESA M4 Ariel Mission. We used TauREx to simulate the Ariel transmission spectra of representative targets of the Ariel mission reference sam…
Correcting the effect of stellar spots on ARIEL transmission spectra
2020
The goal of this study is to assess the impact of the stellar spots on the extraction of the planetary transmission spectra observed by ARIEL. We develop a method to model the stellar spectrum of a star in the presence of spots by using the out-of-transit observations. It is based on a chi squared minimization procedure of the out-of-transit spectrum on a grid of stellar spectra with different sizes and temperatures of the spots. The approach allows us also to study the temporal evolution of the spots when comparing stellar spectra observed at different epochs. We also present a method to correct the transit depth variations due to non-occulted stellar spots and estimate the error we introd…
Online Meetings in Times of Global Crisis: Toward Sustainable Conferencing
2020
International conferences are an essential component of the timely exchange of ideas and results in the scientific community, where scientists present their results, gain new insights, and meet colleagues and collaborators. In early 2020, a global pandemic caused by a coronavirus (SARS-CoV-2) and the corresponding disease (covid-19) resulted in a number of conferences being canceled or postponed. (1) To foster scientific exchange despite the restrictions, a range of initiatives were launched across the globe to move international conferences online. (2−8) [...]
Transhumanismo, discurso transgénero y digitalismo: ¿exigencias de justicia o efectos del espíritu de abstracción?
2021
There are three great existential challenges for the human being in the present time: transhumanism, transgender discourse and digitalism. These three phenomena are enormously powerful today because they are driven by two overwhelming forces which, however, tend to collide opposing each other. On the one hand, they are encouraged by a demand for justice and emancipation, which seeks to end deeply rooted forms of discrimination and to seek effective equality among all human beings. On the other hand, they are sustained on a philosophical basis that denies the intelligibility of reality and the teleological condition of human existence, proposing instead, as the only guide to orient human lif…
Matter and Form in Sixteenth-Century Spain: Some Case Studies
2012
In the last few decades, scholars have rethought the history of matter theories in important ways, particularly with respect to the sources, origins and antecedents of atomism and corpuscularianism in the seventeenth century. In particular, recent commentators have shown that the supposed opposition between atomism and Aristotelianism is insufficient for understanding the historical development of matter theories and their conceptual plurality. Along with corpuscular doctrines dating back to Antiquity, such as those of Heron or Asclepiades, well treated in Lasswitz’s classic work, certain aspects of the Aristotelian corpus and tradition have contributed in important ways to subsequent corpu…
Methane line parameters in the HITRAN2012 database
2013
International audience; The compilation of methane molecular line parameters was updated to include new global analyses and measurements for 12CH4, 13CH4 and 12CH3D. Over 70% of the methane parameters in HITRAN2008 were replaced; existing parameters retained were the microwave lines and the Dyad of 13CH4 near 7 μm and ν6 of 13CH3D near 8.7 μm, 12CH3D (7-4076 cm-1), hot bands of 12CH4 (1887-3370 cm-1) and normal sample CH4 (4800-5550 cm-1 and 8000-9200 cm-1). With a minimum intensity at 296 K in units of cm-1/(molecule cm-2) set to 10-37 for the far-IR and 10-29 for the mid- and near-IR, the methane database increased from 290,091 lines in HITRAN2008 to 468,013 lines, and three-fourths of th…
Nietzsche y el mejoramiento humano. Reflexiones en torno a la noción de vida
2017
El presente trabajo expone el diálogo entre nietzsche y la escuela darwinista, destacando el contraste entre dos nociones de «vida» opuestas: vida como lucha por la supervivencia o vida como voluntad de poder. En oposición a la selección natural, que según nietzsche no favorece a los fuertes y poderosos sino a lo mediano y al «gran número», el filósofo alemán idea un proyecto de cría (Züchtung), una formación tanto fisiológica como moral que aspira a una auténtica elevación del ser humano, mediante la superación de las interpretaciones nihilistas y la transvaloración de los valores desde una perspectiva vitalista.
Is displacement possible without language? Evidence from preverbal infants and chimpanzees
2013
Is displacement possible without language? This question was addressed in a recent work by Liszkowski and colleagues (Liszkowski, Schafer, Carpenter, & Tomasello, 2009). The authors carried out an experiment to demonstrate that 12-month-old prelinguistic infants can communicate about absent entities by using pointing gestures, while chimpanzees cannot. The main hypothesis of their study is that displacement does not depend on language but is, however, exclusively human and instead depends on species-specific social-cognitive human skills. Against this hypothesis, we will argue that a symbolic representation is needed to intentionally communicate absence and that this symbolic representa…
Constructing the Centre from the Periphery
2003
During recent decades, scientific activity in the Spanish Enlightenment has attracted the attention of many historians of science. The policies of enlightened governments have been regarded as an important step in the process of modernisation of eighteenth-century Spanish society. At the beginning of that century, a new Bourbon dynasty was established in Spain and its policies have been regarded — mainly by conservative historians — as an attempt to introduce “foreign” ideas and practices into Spain. These policies have also been considered as a major effort to “modernise” a supposedly traditionalist country isolated from the rest of Europe and under the control of the powerful Catholic Chu…
From Planning to Management of Cultural Heritage Sites: Controversies and Conflicts Between Unesco WHL Management Plans and Local Spatial Planning in…
2014
The paper investigates the relationship between the preservation of cultural heritage and planning in UNESCO World Heritage List (WHL) sites, with special reference to the relation be- tween Management Plans and other (local and regional) planning instruments and policies able to influence the promotion of sustainable and responsible development. This will be explored through a case study related to South-Eastern Sicilian UNESCO sites (in particular Syracuse). The analysis of this case study will point out the challenge of integrating different management and planning regimes - which mainly refer to a performative model - in a (still) very conformative planning sys- tem. The paper will show…