Browsing by Author "201-0079000"
Now showing items 1-19 of 19
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(IOP, 2020)We identify 1901 galaxy clusters (N-g >= 2) with the VoML+G algorithm (Paper I) on the Two-Degree Field Galaxy Redshift Survey. We present the 341 clusters with at least 10 galaxies that are within 0.009 < z < 0.14 (the ...
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(2016)We study the compatibility of large quasar groups with the concordance cosmological model. Large quasar groups are very large spatial associations of quasars in the cosmic web, with sizes of 50-250 h(-1) Mpc. In particular, ...
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(IOP Publishing, 2017-05)Galaxy observations and N-body cosmological simulations produce conflicting dark matter halo density pro files for galaxy central regions. While simulations suggest a cuspy and universal density pro file (UDP) of this ...
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(Elsevier, 2018)This paper presents a new algorithm to find under-dense regions called voids inside a 2D point set. The algorithm starts from terminal-edges (local longest-edges) in a Delaunay triangulation and builds the largest possible ...
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(Universidad de Chile, 2016)En el campo de la cosmología, los vacíos son regiones del espacio cuya densidad es nota- blemente menor que la densidad de fondo, abarcando distancias en el rango de 20 50 Mpc/h (1 Mpc/h ∼ 2,10 × 1019 km). Los primeros ...
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(The American Astronomical Society, 2016)A We evaluate the dry merger activity in the Coma cluster, using a spectroscopically complete sample of 70 red-sequence (RS) galaxies, most of which (similar to 75%) are located within 0.2R(200) (similar to 0.5 Mpc) from ...
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(Oxford University Press, 2013-06)We have investigated the strength of ultraviolet (UV) Fe II emission from quasars within the environments of large quasar groups (LQGs) in comparison with quasars elsewhere, for 1.1 ≤ ¯zLQG ≤ 1.7, using the DR7QSO catalogue ...
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La era inflamatoria del universo en teorias de bigravedad: perspectivas teóricas y observacionales (Universidad de Chile, 2012)Este trabajo representa un primer intento para unir el paradigma inflacionario con teorías de bigravedad. Por una parte, inflación es un período hipotético dentro de la historia del Universo durante del cual el Universo ...
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(Universidad de Chile, 2016)This thesis describes the work that I performed to analyse the data from the Atacama B-mode Search (ABS) experiment. The ABS experiment observed the Cosmic Microwave Background (CMB) radiation for three years using ...
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(Universidad de ChilePrograma Cybertesis, 2007)
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(Universidad de ChileCyberDocs, 2012)Dados los avances en la tecnología, la astronomía es capaz de recolectar del orden de terabytes de datos por noche. El análisis manual de ésta es prácticamente imposible, por lo que es constante la necesidad de nuevos y ...
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(Universidad de Chile, 2009)Las observaciones de galaxias a corrimientos al rojo menores que 1 (z < 1) han mostrado que durante los últimos 8 giga-años de existencia del universo, las propiedades generales de las galaxias se mantienen parecidas a las ...
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(2002)We look at quasar environment in the context of large-scale structure (LSS) – a new approach, giving a more informed interpretation of quasar–galaxy correlations. This paper presents our first results for a sample of z ...
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(Universidad de Chile, 2011)La distribución de galaxias a gran escala define una compleja red de filamentos, murallas y vacíos de galaxias, situándose los cúmulos de galaxias en la intersección de filamentos. A dicha red se la conoce como “Estructura ...
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(Universidad de Chile, 2016)Cold Dark matter (ΛCDM) models have been remarkably successful to explain the observed large scale structure of our universe on scales of the order of galaxy clusters (≥ 4 Mpc) and above (therefore in this work we consider ...
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(Oxford Univ. Press, 2016)We present an axially symmetric formula to calculate the probability of finding gravitational arcs in galaxy clusters, being induced by their massive dark matter haloes, as a function of clusters redshifts and virial masses. ...
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(Oxford University Press on behalf of the Royal Astronomical Society, 2013-03)A large quasar group (LQG) of particularly large size and high membership has been identified in the DR7QSO catalogue of the Sloan Digital Sky Survey. It has characteristic size (volume(1/3)) similar to 500 Mpc (proper ...
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(Oxford Univ. Press, 2016)We investigate the strength of ultraviolet Fe ii emission in fainter quasars compared with brighter quasars for 1.0 a parts per thousand currency sign z a parts per thousand currency sign 1.8, using the Sloan Digital Sky ...
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(Universidad de Chile, 2014)Vocludet es un algoritmo de detección de cúmulos de galaxias, el cual está diseñado para detectar múltiples cúmulos en un espacio tridimensional. El algoritmo se basa en la \Gls{voronoi} para detectar regiones de alta ...
