Academic literature on the topic 'Atmosphère primordiale'

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Journal articles on the topic "Atmosphère primordiale"

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Ragossnig, Florian, Alexander Stökl, Ernst Dorfi, Colin P. Johnstone, Daniel Steiner, and Manuel Güdel. "Interaction of infalling solid bodies with primordial atmospheres of disk-embedded planets." Astronomy & Astrophysics 618 (October 2018): A19. http://dx.doi.org/10.1051/0004-6361/201832681.

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Context. Planets that form early enough to be embedded in the circumstellar gas disk accumulate thick atmospheres of nebular gas. Models of these atmospheres need to specify the surface luminosity (i.e. energy loss rate) of the planet. This luminosity is usually associated with a continuous inflow of solid bodies, where the gravitational energy released from these bodies is the source of energy. However, if these bodies release energy in the atmosphere instead of at the surface, this assumption might not be justified. Aims. Our aim is to explore the interactions of infalling planetesimals with
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Modirrousta-Galian, Darius, and Jun Korenaga. "The Diffusion Limit of Photoevaporation in Primordial Planetary Atmospheres." Astrophysical Journal 965, no. 1 (2024): 97. http://dx.doi.org/10.3847/1538-4357/ad276f.

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Abstract Photoevaporation is thought to play an important role in early planetary evolution. In this study, we investigate the diffusion limit of X-ray- and ultraviolet-induced photoevaporation in primordial atmospheres. We find that compositional fractionation resulting from mass loss is more significant than currently recognized, because it is controlled by the conditions at the top of the atmosphere, where particle collisions are less frequent. Such fractionation at the top of the atmosphere develops a compositional gradient that extends downward. The mass outflow eventually reaches a stead
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Chance, Quadry, Sarah Ballard, and Keivan Stassun. "Signatures of Impact-driven Atmospheric Loss in Large Ensembles of Exoplanets." Astrophysical Journal 937, no. 1 (2022): 39. http://dx.doi.org/10.3847/1538-4357/ac8a97.

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Abstract The results of large-scale exoplanet transit surveys indicate that the distribution of small planet radii is likely sculpted by atmospheric loss. Several possible physical mechanisms exist for this loss of primordial atmospheres, each of which produces a different set of observational signatures. In this study, we investigate the impact-driven mode of atmosphere loss via N-body simulations. We compare the results from giant impacts, at a demographic level, to results from another commonly invoked method of atmosphere loss, photoevaporation. Applying two different loss prescriptions to
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Kimura, Tadahiro, and Masahiro Ikoma. "Formation of aqua planets with water of nebular origin: effects of water enrichment on the structure and mass of captured atmospheres of terrestrial planets." Monthly Notices of the Royal Astronomical Society 496, no. 3 (2020): 3755–66. http://dx.doi.org/10.1093/mnras/staa1778.

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ABSTRACT Recent detection of exoplanets with Earth-like insolation attracts growing interest in how common Earth-like aqua planets are beyond the Solar system. While terrestrial planets are often assumed to capture icy or water-rich planetesimals, a primordial atmosphere of nebular origin itself can produce water through oxidation of the atmospheric hydrogen with oxidizing minerals from incoming planetesimals or the magma ocean. Thermodynamically, normal oxygen buffers produce water comparable in mole number equal to or more than hydrogen. Thus, the primordial atmosphere would likely be highly
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Montoya, David. "Hostilidad perpetua, transformaciones transitorias: Persona, cuerpo y moralidad entre los tsotsiles de Chamula, Chiapas / Perpetual hostility, transitory transformations: Person, body and morality between the tsotsiles of Chamula, Chiapas." Revista Trace, no. 78 (July 31, 2020): 67. http://dx.doi.org/10.22134/trace.78.2020.735.

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El actual estudio etnográfico da cuenta de que lo chon –un aspecto de la persona, generalmente, asociado a lo animal– está relacionado con un estado de permanente hostilidad, presente en el mundo desde tiempos primordiales. Este aspecto, a la vez que potencia la vulnerabilidad entre los humanos, resalta la fortaleza de otros seres, como Dios y el Pukuj. En la búsqueda de lidiar con esa atmósfera de hostilidad y, de mitigar su propia vulnerabilidad, la humanidad experimenta múltiples transformaciones morales-corporales.Abstract: This ethnographic study shows that the chon –an aspect of the pers
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Sinclair, Catriona A., Mark C. Wyatt, Alessandro Morbidelli, and David Nesvorný. "Evolution of the Earth’s atmosphere during Late Veneer accretion." Monthly Notices of the Royal Astronomical Society 499, no. 4 (2020): 5334–62. http://dx.doi.org/10.1093/mnras/staa3210.

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ABSTRACT Recent advances in our understanding of the dynamical history of the Solar system have altered the inferred bombardment history of the Earth during accretion of the Late Veneer, after the Moon-forming impact. We investigate how the bombardment by planetesimals left-over from the terrestrial planet region after terrestrial planet formation, as well as asteroids and comets, affects the evolution of Earth’s early atmosphere. We develop a new statistical code of stochastic bombardment for atmosphere evolution, combining prescriptions for atmosphere loss and volatile delivery derived from
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Saxena, Prabal, Lindy Elkins-Tanton, Noah Petro, and Avi Mandell. "A model of the primordial lunar atmosphere." Earth and Planetary Science Letters 474 (September 2017): 198–205. http://dx.doi.org/10.1016/j.epsl.2017.06.031.

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Rogers, James G., Caroline Dorn, Vivasvaan Aditya Raj, Hilke E. Schlichting, and Edward D. Young. "Most Super-Earths Have Less Than 3% Water." Astrophysical Journal 979, no. 1 (2025): 79. https://doi.org/10.3847/1538-4357/ad9f61.

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Abstract Super-Earths are highly irradiated, small planets with bulk densities approximately consistent with Earth. We construct combined interior atmosphere models of super-Earths that trace the partitioning of water throughout a planet, including an iron-rich core, silicate-rich mantle, and steam atmosphere. We compare these models with exoplanet observations to infer a 1σ upper limit on the total water mass fraction of ≲3% at the population level. We consider end-member scenarios that may change this value, including the efficiency of mantle outgassing, escape of high mean molecular weight
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Young, Edward D., Anat Shahar, and Hilke E. Schlichting. "Earth shaped by primordial H2 atmospheres." Nature 616, no. 7956 (2023): 306–11. http://dx.doi.org/10.1038/s41586-023-05823-0.

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Libby-Roberts, Jessica E., Zachory K. Berta-Thompson, Hannah Diamond-Lowe, et al. "The Featureless HST/WFC3 Transmission Spectrum of the Rocky Exoplanet GJ 1132b: No Evidence for a Cloud-free Primordial Atmosphere and Constraints on Starspot Contamination." Astronomical Journal 164, no. 2 (2022): 59. http://dx.doi.org/10.3847/1538-3881/ac75de.

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Abstract Orbiting an M dwarf 12 pc away, the transiting exoplanet GJ 1132b is a prime target for transmission spectroscopy. With a mass of 1.7 M ⊕ and radius of 1.1 R ⊕, GJ 1132b’s bulk density indicates that this planet is rocky. Yet with an equilibrium temperature of 580 K, GJ 1132b may still retain some semblance of an atmosphere. Understanding whether this atmosphere exists and its composition will be vital for understanding how the atmospheres of terrestrial planets orbiting M dwarfs evolve. We observe five transits of GJ 1132b with the Wide Field Camera 3 (WFC3) on the Hubble Space Teles
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Dissertations / Theses on the topic "Atmosphère primordiale"

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Nunez, Elena. "The origin of terrestrial neon : an experimental study of isotopic fractionation of Neon during basalt degassing." Electronic Thesis or Diss., Orléans, 2024. http://www.theses.fr/2024ORLE1030.

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L'origine des éléments volatils de la Terre, cruciale pour comprendre l'évolution du Système Solaire primitif, la formation de la Terre et la vie, reste débattue. Les gaz nobles, en raison de leur inertie et de leur grande volatilité, servent de traceurs clés pour les principaux volatils tels que le CO2 et le H2O dans le manteau.Les signatures des gaz nobles dans les panaches mantelliques, en particulier ceux des Galapagos, d'Hawaï et d'Islande, suggèrent un néon de type solaire acquis lors de la formation de la Terre. Deux modèles principaux expliquent l'origine du néon dans le manteau : (i)
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Lunine, Jonathan Irving. "Volatiles in the Outer Solar System: I. Thermodynamics of Clathrate Hydrates. II. Ethane Ocean on Titan. III. Evolution of Primordial Titan Atmosphere." Thesis, 1985. https://thesis.library.caltech.edu/7490/1/Lunine_ji_1985.pdf.

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<p>Three investigations are conducted into the physical chemistry of volatiles in the outer solar system and the role of volatiles in icy satellite evolution.</p> <p>Part I:</p> <p>The thermodynamic stability of clathrate hydrate is calculated under a wide range of temperature and pressure conditions applicable to solar system problems, using a statistical mechanical theory developed by Van der Waals and Platteeuw (1959) and existing experimental data on properties of clathrate hydrates and their components. At low pressure, dissociation pressures and partition functions (Langmuir consta
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Books on the topic "Atmosphère primordiale"

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Theoretical considerations on the effects of electromagnetic fields on primordial reducing atmospheres. 1990.

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Trieloff, Mario. Noble Gases. Oxford University Press, 2017. http://dx.doi.org/10.1093/acrefore/9780190647926.013.30.

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This is an advance summary of a forthcoming article in the Oxford Encyclopedia of Planetary Science. Please check back later for the full article.Although the second most abundant element in the cosmos is helium, noble gases are also called rare gases. The reason is that they are not abundant on terrestrial planets like our Earth, which is characterized by orders of magnitude depletion of—particularly light—noble gases when compared to the cosmic element abundance pattern. Indeed, such geochemical depletion and enrichment processes make noble gases so versatile concerning planetary formation a
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Book chapters on the topic "Atmosphère primordiale"

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Makki, Tahani, Mounib El Eid, and Grant Mathews. "New Insight Concerning Primordial Lithium Production." In Springer Proceedings in Physics. Springer Nature Singapore, 2025. https://doi.org/10.1007/978-981-96-3276-3_3.

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Abstract To constrain the universe before recombination (380000 years after the Big Bang), we mostly rely on the measurements of the primordial abundances that indicate the first insight into the thermal history of the universe. The first production of light elements is obtained by the Big Bang Nucleosynthesis (BBN). The production of the elements D, 3He, and 4He during BBN matches well the observations; however, the production of lithium (7Li) based on the Standard Big Bang Nucleosynthesis (SBBN) is found to be higher by about a factor of three than the observed abundance from metal-poor halo
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Pepin, Robert O. "On the Isotopic Composition of Primordial Xenon in Terrestrial Planet Atmospheres." In From Dust to Terrestrial Planets. Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-011-4146-8_24.

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Zalasiewicz, Jan, and Mark Williams. "Primordial Climate." In The Goldilocks Planet. Oxford University Press, 2012. http://dx.doi.org/10.1093/oso/9780199593576.003.0007.

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We are lucky, on Earth. We are lucky because we—as complex and self-aware organisms—are here. We are sustained, given air to breathe, and water, and food, by a very ancient planet: a planet past its midpoint, a planet that is nearer death than birth. Our species is a latecomer. It took some three billion years to bridge the gap from a single-celled organism (originating in this planet’s youth) to a multicellular one, and then a little over half a billion more to arrive at the diversity of species on Earth today, including Homo sapiens . In all this time, the chain of life has remained unbroken
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Ni, Sidao, and Thomas J. Ahrens. "Giant impact-induced blow-off of primordial atmosphere." In Large Meteorite Impacts III. Geological Society of America, 2005. http://dx.doi.org/10.1130/0-8137-2384-1.427.

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Arbib, Michael A. "Atmosphere, affordances, and emotion." In When Brains Meet Buildings. Oxford University Press, 2021. http://dx.doi.org/10.1093/med/9780190060954.003.0004.

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The atmosphere of a building is the pervading mood it provides, and can be considered a non-Gibsonian affordance. Atmosphere may frame our experience of a building, but over time our perception of the atmosphere may change. This chapter explores atmosphere in relation to motivation and emotion and the role of the limbic system of the brain. Emotion builds on a set of primordial emotions, but human cognition adds subtlety and supports aesthetic emotions. Paintings by Turner and Constable are examined to take the reader beyond the phenomenology of atmosphere and to explore the idea that the arti
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Milgrom, Lionel R. "Where porphyrins come from …" In The Colours of Life. Oxford University PressOxford, 1997. http://dx.doi.org/10.1093/oso/9780198553809.003.0002.

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Abstract It is difficult to imagine the earth as a young world devoid of all life. The famous Walt Disney cartoon Fantasia gives as good a picture as any of what our prebiotic planet must have been like. The scientific imagination has managed to add some bones to Hollywood’s speculations, in the form of experiments on mixtures of gases that are thought to have constituted the earth’s primordial atmosphere.
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Witten, T., and P. Pincus. "Overview." In Structured Fluids. Oxford University PressOxford, 2004. http://dx.doi.org/10.1093/oso/9780198526889.003.0001.

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Abstract As physical scientists, we are concerned with the behaviour of matter in all its forms. We want to know what matter does and why. This is our goal in studying the primordial universe, the tenuous interstellar medium, the gaseous atmosphere of the Earth, the ionized plasma of the Sun’s corona, the mundane liquids and solids of our human surroundings, and the exotic dense matter within a molecule, an atomic nucleus, or a proton. This book is about a tiny subset of this vast range of forms of matter: structured fluids. Structured fluids are liquids, i.e., condensed matter in which the at
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Lahav, Noam. "Planet Earth." In Biogenesis. Oxford University PressNew York, NY, 1999. http://dx.doi.org/10.1093/oso/9780195117547.003.0014.

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Abstract Except for major short-term perturbations in surface environments caused by a declining flux of impactors, equable conditions for prebiotic evolution could have existed as early as 4.4 GA. The earth is about 4.6 Ga old. At that remote time, known as the Hadean era (fig. 13.1), its surface was very hot as a result of the accretion process, which, according to recent hypotheses, took about a hundred million years: Its temperature, according to recent models, was about 1,500°K. Thus, the surface was molten. The iron-group elements (Fe, Ni, and Co) melted and passed through the lighter si
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Fradenburg Joy, L. O. Aranye. "‘Le Sigh’: Enactive and Psychoanalytic Insights into Medieval and Renaissance Paralanguage." In Distributed Cognition in Medieval and Renaissance Culture. Edinburgh University Press, 2019. http://dx.doi.org/10.3366/edinburgh/9781474438131.003.0015.

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Sighing is both performative and vital activity, and exemplifies the role of ‘primordial affectivity’ in the organism’s co-creativity with its environment. Emerging from the organism’s ‘cares’, transforming the atmosphere and the affect that initiated it, the sigh is a striking instance of distributed cognition, an action reaching through ancient respiratory processes to the most deliberate forms of self-care. Premodern psychology understood the sigh as an attempt to free the circulation of vital and animal spirits from blockage caused by the overheating of imaginative and estimative faculties
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Culliney, John L., and David Jones. "Ecology Emergent." In The Fractal Self. University of Hawai'i Press, 2017. http://dx.doi.org/10.21313/hawaii/9780824866617.003.0004.

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Ever since life’s debut on the earth, biotic evolution has been a near-balancing act. On virtually every level, competition and cooperation, shifting endlessly between foreground and background, have tugged and teased evolving systems as they have wobbled through time along the edge of chaos. The emergence of cellular life from the world of complex carbon-based chemistry appears to have happened only once in the primordial dreamtime of planet Earth. Scientists base this conjecture on a number of virtually universal distributions of chemical structures and processes across the spectrum of livin
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