Výsledky vyhledávání - "Pertorbació (Astronomia)"

Autor: Quera Coderch, Lı́dia

Treballs Finals de Grau de Matemàtiques, Facultat de Matemàtiques, Universitat de Barcelona, Any: 2023, Director: Ernest Fontich
[en] The Sitnikov Problem is the study of the dynamics of a particular system in the restricted Three-Body Problem

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od_______963::81f5a0cc38e14b5d61b26d7819abc243
http://hdl.handle.net/2445/199100

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Effects of the Galactic bar and a satellite galaxy on the Milky Way

Autor: Raga Batlle, Francesc

Treballs Finals de Grau de Física, Facultat de Física, Universitat de Barcelona, Curs: 2022-2023, Tutora: Maria Teresa Antoja Castelltort
The detection of different kinematic disturbances in observational data from our Galaxy suggests its sens

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od_______963::5a2628519fb03e7646f2a100fb528cfc
http://hdl.handle.net/2445/194478

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Study: Parallel implementation of a Shallow Water atmospheric model

Autor: Sierra Salvadó, Martí

Publikováno v: UPCommons. Portal del coneixement obert de la UPC
Universitat Politècnica de Catalunya (UPC)

The current software for planetary atmosphere simulations, at the moment of writing this thesis, is already extended to a ShallowWater monolayer and multilayer model. Thus, this document focuses on the implementation of the atmospheric perturba

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::5a3596f0fe1e084402ab8093a458292b
http://hdl.handle.net/2117/360470

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Analysis of ionospheric scintillation in GNSS signals

Autor: Tortajada Ropero, Lorena

Publikováno v: UPCommons. Portal del coneixement obert de la UPC
Universitat Politècnica de Catalunya (UPC)

Scintillation is a particular type of space weather disturbance that currently limits the accuracy and availability of the Global Navigation Satellite System. The present final master’s thesis aims to study the characteristics of satellite navigati

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::5f4e32e05ebcddf780df7ce9e92ed264
http://hdl.handle.net/2117/361300

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PBH in single field inflation: the effect of shape dispersion and non-Gaussianities

Autor: Jaume Garriga, Judith Cid, Vicente Atal, Albert Escrivà

Publikováno v: Dipòsit Digital de la UB
Universidad de Barcelona

Primordial black holes (PBHs) may result from high peaks in a random field of cosmological perturbations. In single field inflationary models, such perturbations can be seeded as the inflaton overshoots a small barrier on its way down the potential.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d2bdcb2c9488134e7205a50bdc4ee883
http://hdl.handle.net/2445/172614

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Primordial black holes from high peaks in the density field

Autor: Cid Giménez, Judith

Publikováno v: Dipòsit Digital de la UB
Universidad de Barcelona

Treballs Finals de Grau de Física, Facultat de Física, Universitat de Barcelona, Curs: 2019, Tutor: Jaume Garriga
In this work we study the formation of primordial black holes, through the collapse of spherically symmetric overdensities during

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::8ffc11ff787903a6d2df9f0e8c81209e
http://hdl.handle.net/2445/141140

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Quantum corrections to the gravitational potentials of a point source due to confromal fields in de Sitter

Autor: Markus B. Fröb, Enric Verdaguer

Publikováno v: Journal of Cosmology and Astroparticle Physics
Dipòsit Digital de la UB
Universidad de Barcelona

We derive the leading quantum corrections to the gravitational potentials in a de Sitter background, due to the vacuum polarization from loops of conformal fields. Our results are valid for arbitrary conformal theories, even strongly interacting ones

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f7def3a1f1da2f89d68fbaaeb7f40acd
http://hdl.handle.net/2445/128243

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Primordial Perturbations in Einstein-Aether theories

Autor: Fariña Sierra, Noela

Publikováno v: Recercat. Dipósit de la Recerca de Catalunya
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El nostre objectiu es l'estudi d'extensions de la Relativitat General i, en particular, estem interessats en les teories que continguin camps vectorials addicionals. En aquests tipus de teories es necessari imposar que el vector ha de tenir norma fix

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::ab0e3c56c291c7bc0808876d06bb54f7
https://hdl.handle.net/2072/97401

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Large scale structure and dark energy

Autor: Cabré Albós, Anna

Publikováno v: TDX (Tesis Doctorals en Xarxa)
TDR. Tesis Doctorales en Red
instname
Dipòsit Digital de la UB
Universidad de Barcelona

The cosmic expansion history tests the dynamics of the global evolution of the universeand its energy density contents, while the cosmic growth history tests the evolution of theinhomogeneous part of the energy density. By comparing both histories, w

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::7d5c5f389f58bfc40b9b1e8dd7c96f6e
http://www.tdx.cat/TDX-0721108-122438

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Cosmological perturbations from stochastic gravity

Autor: Albert Roura, Enric Verdaguer

Publikováno v: Dipòsit Digital de la UB
Universidad de Barcelona
Recercat. Dipósit de la Recerca de Catalunya
instname

In inflationary cosmological models driven by an inflaton field the origin of the primordial inhomogeneities which are responsible for large scale structure formation are the quantum fluctuations of the inflaton field. These are usually computed usin

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3f2c6ba6917a1cf4840f8d1d53760372
http://arxiv.org/abs/0709.1940

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