Para a confecção deste modelo foi utilizado a última versão (1.nine.six) do pacote de classes \textit abnTeX2 que segue as normas da Associação Brasileira de Normas Técnicas. A elaboração de uma monografia, dissertação ou tese pode ser feita sobrescrevendo o conteúdo deste modelo. Modelo, Monografia de qualificação, Dissertação, Tese, Latex % resumo em INGLÊS
termo midia da língua inglesa, é um silogismo importado daquela língua. Sua origem é a mesma da língua
Photometric variability is probably the key qualities of young stellar objects and Discovering its particularities in several wavelengths may possibly offer insights on the continuing Actual physical procedures at get the job done in such objects. The most common supply of photometric variability in young stars could be the brightness modulation attributable to the rotation of the spotted stellar area. Such a variability enables the measurement of rotational periods in younger stars. In the final many years, the early pre-principal sequence stellar rotational evolution photograph has long been constrained by research focusing on unique young locations at a number of ages. Observational scientific tests recommend a dependence of rotation with mass, and for many mass ranges a connection amongst rotation and also the existence of a circumstellar disc. Not continue to completely explored, even though, is definitely the part of environmental disorders around the stellar rotational regulation. With this thesis, we explored the occurrence and key characteristics of around-infrared variability in youthful stars in the massive OB Affiliation Cygnus OB2, which is 1.four kpc far from the Sunshine. For objects with periodic variability that could be connected with stellar rotation, we investigated the rotational Attributes of Cygnus OB2 members. To the sample of rotational durations evaluated, we tackled inquiries regarding the impact of natural environment properties about the pre-most important sequence rotational evolution. We investigated JHK-band variability of 5083 candidate customers (24% of which happen to be disc-bearing stars), making use of facts observed With all the huge-field digital camera (WFCAM) of the united kingdom Infrared Telescope (UKIRT) on Mauna Kea, Hawaii. A complete of 112 nights have been noticed, spanning 217 days. The sample researched is distribute over a area of 0.seventy eight squared degrees. The selection of variable stars was performed using Stetson variability index, and 60% of The celebs during the sample had been located to generally be variable Based on this criterion.
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We investigated The sunshine-curve morphology, and also the versions while in the colour-colour and colour-magnitude diagrams for JHK-bands, and in the event the variability was highly correlated in numerous bands and colours, the slopes made by the variants inside of this kind of diagrams have been approximated. These slopes were being compared to the slopes expected from your types outlining Actual physical mechanisms responsible from the variability in younger stars, along with the will cause of variability were being investigated. Period search was carried out employing Lomb-Scargle periodogram for intervals involving 0.eighty three-forty five days. Period detections had been verified through the use of Wrong Alarme Chance concentrations, the Saunders statistics, string/rope length technique, and visual verification of folded mild curves. We recognized 1224 periodic variable stars. Monte Carlo simulations have been done so as to Examine completeness and contamination of your periodic sample, out of which 894 measured periods were considered as dependable. Our examine was regarded resonably comprehensive for intervals involving two and thirty times. The final state of affairs with the rotational evolution of youthful stars seen in other regions is confirmed by Cygnus OB2 period distributions, with disc-bearing stars rotating on average slower Monografias Prontas than stars without discs. A mass-rotation dependence was also verified, but as in NGC 6530, extremely reduced mass stars (M < 0.4 Msun) are rotating on typical slower than greater mass stars (0.4 Msun < M < 1.4 Msun). We observed an excess of slow rotators among the reduce mass population. The disc and mass-rotation connection was also analysed by taking into account the incident UV radiation arising from O stars within the association. Outcomes compatible with the disc-locking scenario were verified for stars with low UV incidence, but no statistical significant relation concerning rotation and disc existence was confirmed for stars with significant UV incidence, suggesting that large stars might have a significant position on regulating the rotation of close by minimal mass stars.
% Tanto na capa quanto nas folhas de rosto apenas a primeira letra da primeira palavra (ou nomes próprios) devem estar em letra maiúscula, todas as demais devem ser em letra minúscula.
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\start anexosenv \chapter Páginas interessantes na World-wide-web \label chapter:paginas-interessantes \enter tex/annex/paginas-interessantes \stop anexosenv
\textoresumo[brazil] Este trabalho é um breve modelo para a escrita de monografias de qualificação, dissertações e teses utilizando o ambiente \LaTeX, de acordo com as normas exigidas pelo Instituto de Ciências Matemáticas e de Computação (ICMC), da Universidade de São Paulo (USP).