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Teses / dissertações sobre o tema "The early history of astronomy and cosmology"

Autor: Grafiati

Publicado: 25 de julho de 2024

Última modificação: 31 de julho de 2025

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1

Terlevich, Alejandro Ivan. "Probing the star formation history of early-type galaxies in clusters." Thesis, Durham University, 1998. http://etheses.dur.ac.uk/4864/.

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In this thesis, we present a new photometric catalogue of the local Coma galaxy cluster in the Johnson U- and V- bands. We cover an area of 3360arcmin(^2) of sky, to a depth of V = 20mag in a 13 arcsec diameter aperture, and produce magnitudes for ~ 1400 extended objects in metric apertures from 8.8 to 26arcsec diameters. The mean internal RMS scatter in the photometry is 0.014mag in V, and 0.026mag in U, for Via(_13) < 17mag. We use this photometric catalogue to place limits on the levels of scatter in the colour- magnitude relation (CMR) in the Coma cluster. We subdivide the galaxy populatio

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2

Murray, Brian M. "Early and late universe cosmology /." view abstract or download file of text, 2006. http://proquest.umi.com/pqdweb?did=1276405191&sid=1&Fmt=2&clientId=11238&RQT=309&VName=PQD.

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Thesis (Ph. D.)--University of Oregon, 2006.<br>Typescript. Includes vita and abstract. Includes bibliographical references (leaves 75-80). Also available for download via the World Wide Web; free to University of Oregon users.

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3

Emond, William. "Dynamics of early & late universe cosmology." Thesis, University of Nottingham, 2018. http://eprints.nottingham.ac.uk/55493/.

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In this thesis we discuss two key problems: the cosmological constant problem (CCP), an issue that primarily manifests itself in late universe cosmology; and the process of thermalisation during the post-inflationary reheating phase of the early universe. We start by giving a brief review of general relativity, discussing both its successes and failures, in particular, why one might consider modifications of it. We then delve into the aspects of early and late universe cosmology that we aim to address in the research discussed in this thesis. Starting with an overview of the inflationary parad

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4

Sullivan, William F. "The astronomy of Andean myth : the history of a cosmology." Thesis, University of St Andrews, 1986. http://hdl.handle.net/10023/1011.

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The paper aims to show that Andean myth, on one level, represents a technical language recording astronomical observations of precession and, at the same time, an historical record of simultaneous social and celestial transformations. Topographic and architectural terms of Andean myth are interpreted as a metaphor for the organisation of and locations on the celestial sphere. Via ethnoastronmical data, mythical animals are identified as stars and placed on the celestial sphere according to their "topographical " location. Tested in the planetarium, these "arrays" generate clusters of dates - 2

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5

Charnock, Tom. "Early universe cosmology and its observational effects on the cosmic microwave background." Thesis, University of Nottingham, 2017. http://eprints.nottingham.ac.uk/42164/.

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This Thesis is written in three parts. The first part describes the analytic calculation of the unequal-time correlator of cosmic strings and superstrings. The first efficient constraint analysis of all string and superstring network parameters is performed. By studying the effect of cosmic strings on the cosmic microwave background (CMB) radiation it is discovered that cosmic strings must make up a vanishingly small proportion of the energy density of the universe. The constraints on string network parameters are all skewed toward reducing the magnitude of energy density arising from strings.

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6

Valan, Vlasta. "Thermal components in the early X-ray afterglow of gamma-ray bursts." Licentiate thesis, KTH, Partikel- och astropartikelfysik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-217103.

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Gamma-ray bursts (GRBs) are still puzzling scientists even 40 years after their discovery. Questions concerning the nature of the progenitors, the connection with supernovae and the origin of the high-energy emission are still lacking clear answers. Today, it is known that there are two populations of GRBs: short and long. It is also known that long GRBs are connected to supernovae (SNe). The emission observed from GRBs can be divided into two phases: the prompt emission and the afterglow. This thesis presents spectral analysis of the early X-ray afterglow of GRBs observed by the {\it Swift} s

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7

Castello, Sveva. "A Tension between the Early and Late Universe: Could Our Underdense Cosmic Neighbourhood Provide an Explanation?" Thesis, Uppsala universitet, Institutionen för fysik och astronomi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-446960.

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In recent years, the increasingly precise constraints on the value of the Hubble constant, H0, have highlighted a discrepancy between the results arising from early-time and late-time measurements. A potential solution to this so-called Hubble tension is the hypothesis that we reside in a cosmic void, i.e. an underdense cosmic neighbourhood characterized by a faster local expansion rate. In this thesis, we model this scenario through the Lemaître-Tolman-Bondi formalism for an isotropic but inhomogeneous universe containing matter, curvature and a cosmological constant, which we denote by ΛLTB.

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8

Kuntschner, Harald. "The star formation history of early-type galaxies in the Fornax cluster." Thesis, Durham University, 1998. http://etheses.dur.ac.uk/4849/.

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We have measured central line strengths and line-strength gradients for a complete sample of early-type galaxies in the Fornax cluster, comprising 11 elliptical and 11 lenticular galaxies, more luminous than M(_B) = -17. We find that the centres of Fornax ellipticals follow the locus of galaxies of fixed age in Worthey's models and have metallicities varying roughly from half solar to 2.5 times solar. Line-strength gradients indicate that elliptical galaxies do not show age gradients with radius but do exhibit a decrease of ~ 0.4 dex in [Fe/H] between the centre and one effective radius. The c

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9

Schawinski, Kevin. "The star formation history of early-type galaxies." Thesis, University of Oxford, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.670098.

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10

Honchock, Michael P. "Enemies of Science: The Handmaiden's Handmaiden in the Early Medieval West." Thesis, Virginia Tech, 2007. http://hdl.handle.net/10919/32149.

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The gradual blending of classical science and epistemology with indigenous/traditional practices and modes of understanding (particularly magic and religion) in the early western Middle Ages tends to be misunderstood. The purpose of this study is to address the reason(s) why the early medieval West has been labeled an irrational, unscientific â Dark Ageâ in order to point out that this conceptionâ s existence has more to do with limited historical perspectives than with reality. The anachronistic superimposition of modern presuppositions and methodological expectations is a very old phenom

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11

Morgan, Daniel Patrick. "Knowing heaven| Astronomy, the calendar, and the sagecraft of science in early imperial China." Thesis, The University of Chicago, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3606338.

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<p> This dissertation is a series of textual case studies on nontraditional sources for <i>li</i>[special characters omitted]"calendro-astronomy" circa 250 BCE - 250 CE: (1) the silk manuscript guide to military planetary astronomy/astrology <i>Wuxing zhan</i>[special chracters omitted] (168 BCE), (2) excavated calendars and state <i>li</i> manuals, and (3) the <i>Jin shu</i>'s [special characters omitted] record of the debate surrounding a failed attempt at li reform in 226 CE. This selection affords us a number of unique cross sections through the astral sciences. Balancing transmitted with

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12

Ramberg, Nicklas. "Cosmological probes of the early universe with Axions & Gravitational Waves." Thesis, Uppsala universitet, Teoretisk fysik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-394014.

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This thesis uses theoretical studies, and numerical simulations to provide results of the experimental reach to detect the QCD axion as dark matter in a Non-standard cosmological background. Assuming that the QCD axion constitutes the full CDM abundance of the universe, this thesis elaborates on its potential detection from experimental setups for the mass window of the axion. The set of results that is obtained here are the relic CDM energy density of axions produced by the vacuum realignment mechanism and the CDM energy density of axions produced from the decay of a network of cosmic strings

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13

Ali, Sahba Yahya Hamid. "Probing the expansion history of the universe using upernovae and Baryon Acoustic Oscillations." University of the Western Cape, 2016. http://hdl.handle.net/11394/5054.

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Philosophiae Doctor - PhD<br>The standard model of cosmology (the ɅCDM model) has been very successful and is compatible with all observational data up to now. However, it remains an important task to develop and apply null tests of this model. These tests are based on observables that probe cosmic distances and cosmic evolution history. Supernovae observations use the so-called `standard candle' property of SNIa to probe cosmic distances D(z). The evolution of the expansion rate H(z) is probed by the baryon acoustic oscillation (BAO) feature in the galaxy distribution, which serves as an effe

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14

Gardner, Sara Lee. "The sun, moon and stars of the southern Levant at Gezer and Megiddo: Cultural astronomy in Chalcolithic/Early and Middle Bronze Ages." Diss., The University of Arizona, 2002. http://hdl.handle.net/10150/280233.

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Astronomical images are found on monumental structures and decorative art, and metaphorically in seasonal myths, and are documented by calendars. In Israel and the southern Levant, images of the sun, the moon, and the stars were common decorating motifs. They were found on walls, pottery, and seals and date to as early as the Chalcolithic period; for example, the wall painting of a star at Teleilat Ghassul (North 1961). This dissertation establishes that the people of the Levant were aware of the apparent movement of the sun, and this will be discussed in Chapter 4. They began recording throug

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15

Watson, Casey Richard. "The cosmological X-ray evolution of stars, AGN, and galaxies." The Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=osu1148410557.

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16

Papakonstantinou, Nikolaos. "Investigation of variable Ap Stars in TESS continuous viewing zone." Thesis, Uppsala universitet, Observationell astrofysik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-441349.

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17

Wade, Richard Peter. "A systematics for interpreting past structures with possible cosmic references in Sub-Saharan Africa." Diss., Pretoria : [s.n.], 2009. http://upetd.up.ac.za/thesis/available/etd-05052009-174557/.

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18

Brandt, Luiz Antonio. "A superação da dicotomia céu-terra: um estudo da crítica galileana à física e à cosmologia aristotélicas." Universidade Estadual do Oeste do Parana, 2011. http://tede.unioeste.br:8080/tede/handle/tede/2125.

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Made available in DSpace on 2017-07-10T18:26:29Z (GMT). No. of bitstreams: 1 Luiz Antonio Brandt.pdf: 1067816 bytes, checksum: 69a6a677b5382a0454f7bbd9551ddd1f (MD5) Previous issue date: 2011-12-08<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>In this thesis, we aim to conduct a study and reconstruction of the criticism that Galileo undertakes to physics and cosmology of Aristotle, and works as an anchor Sidereus Nuncius and First Day of Dialogue Concerning the Two Chief World Systems. The arguments developed by Italian physicist these works, consolidating the Copernican

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19

Fu, Nicole Christina. "Physical Properties of Massive, Star-Forming Galaxies When the Universe Was Only Two Billion Years Old." Thèse, Université d'Ottawa / University of Ottawa, 2011. http://hdl.handle.net/10393/19956.

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Due to the finite speed of light and a vast, expanding universe, telescopes are just now receiving the light emitted by galaxies as they were forming in the very early universe. The light from these galaxies has been redshifted (stretched to longer, redder wavelengths) as a result of its journey through expanding space. Using sophisticated techniques and exceptional multi-wavelength optical and infrared data, we isolate a population of 378 galaxies in the process of formation when the Universe was only two billion years old. By matching the distinctive properties of the light spectra of the

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20

Caixeta, Bruna Pereira 1990. "Man in the Moone (Londres, 1638) : utopia, ciência e política no pensamento de Francis Godwin." [s.n.], 2014. http://repositorio.unicamp.br/jspui/handle/REPOSIP/269928.

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Orientador: Carlos Eduardo Ornelas Berriel<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Estudos da Linguagem<br>Made available in DSpace on 2018-08-24T21:54:37Z (GMT). No. of bitstreams: 1 Caixeta_BrunaPereira_M.pdf: 41483159 bytes, checksum: 9da2fe0848c5c1d54ac61022e851cefe (MD5) Previous issue date: 2014<br>Resumo: Alguns anos antes da deflagração da Revolução Inglesa de 1640, que na Inglaterra deporia o regime monárquico e daria aos puritanos o controle de um regime pretensamente republicano, ocorreria uma série de erros políticos que contribuiriam para os c

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21

Jones, Jared. "Winging It: Human Flight in the Long Eighteenth Century." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1565963832584991.

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22

D'Helt, Alexandre. "Entre vie contemplative et temps apocalyptique: Philon d'Alexandrie et la formation de la théologie chrétienne." Doctoral thesis, Universite Libre de Bruxelles, 2013. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209463.

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Cette dissertation a pour objectif de fournir un éclairage nouveau sur la cosmologie philonienne à la lumière de la littérature apocalyptique judéo-chrétienne. Il s'agit reposer la question du lien entre Philon d’Alexandrie et la tradition apocalyptique judéo-chrétienne dans une optique qui se veut à la croisée de l’histoire des religions et de l’histoire de la philosophie. Après délimitation du corpus, on y aborde la question du rapport au mythe et à la théologie. La place est ensuite faite à la question des intermédiaires célestes (Anges, Logos, Esprit), ainsi qu’à la liturgie. Ce point nous

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23

Wiegert, Craig Charles. "Constraining compact dark matter with quasar equivalent widths from the Sloan Digital Sky Survey Early data release /." 2003. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:3097172.

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24

(6623981), Ke Shi. "Understanding the early stage of cluster formation." Thesis, 2019.

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Understanding the formation and evolution of galaxies is a crucially important task in modern astronomy. It is well known that galaxy formation is strongly affected by the environments they reside in. Galaxy clusters, as the densest large-scale structures in the Universe, thus serve as ideal laboratories to study how galaxy formation proceeds in dense environments. Clusters already began to form at $z>2$, therefore to directly witness the early stage of galaxy formation in dense environments, it is necessary to identify progenitors of clusters (`protoclusters') and study their galaxy constitue

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25

Watanabe, Yuki. "Toward understanding of the complete thermal history of the universe : probing the early universe by gravitation." 2009. http://hdl.handle.net/2152/7562.

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Gravitational waves are truly transparent to matter in the Universe and carry the information of the very early epoch. We show that the energy density spectrum of the primordial gravitational waves has characteristic features due to the successive changes in the relativistic degrees of freedom during the radiation era. Our calculations are solely based on the standard model of cosmology and particle physics, and therefore these features must exist. Our calculations significantly improve the previous ones which ignored these effects and predicted a smooth, featureless spectrum. Going back in ti

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26

Higgins, Shannon. "G. J. Rheticus and the Authorship of the Anonymous Epistola de terrae motu." 2013. http://hdl.handle.net/10222/34639.

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This thesis considers the anonymously published Epistola de terrae motu and the question of its authorship. The authorship of this treatise was attributed to G. J. Rheticus by Reijer Hooykaas in a publication released in 1984; however, that attribution is not decisive. The first chapter introduces De terrae motu and is followed by a second chapter that contains a review of the relevant historiography relating to scholarship on Rheticus. The third chapter presents Rheticus’ biography. The fourth chapter considers the inconclusive reasoning for the attribution of authorship to Rheticus. The fift

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