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The Life Cycles of Viscous Decretion Disks Around Be Stars: Fundamental Disk Parameters in The

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The Life Cycles of Viscous Decretion Disks Around Be Stars: Fundamental Disk Parameters in The Universidade de S~aoPaulo Instituto de Astronomia, Geof´ısicae Ci^enciasAtmosf´ericas Departamento de Astronomia Leandro Rocha R´ımulo The life cycles of viscous decretion disks around Be stars: fundamental disk parameters in the SMC (Os ciclos de vida dos discos viscosos de decre¸c~aode estrelas Be: par^ametrosfundamentais de discos na Pequena Nuvem de Magalh~aes) S~aoPaulo 2017 Leandro Rocha R´ımulo The life cycles of viscous decretion disks around Be stars: fundamental disk parameters in the SMC (Os ciclos de vida dos discos viscosos de decre¸c~aode estrelas Be: par^ametrosfundamentais de discos na Pequena Nuvem de Magalh~aes) Tese apresentada ao Departamento de Astro- nomia do Instituto de Astronomia, Geof´ısica e Ci^enciasAtmosf´ericas da Universidade de S~aoPaulo como requisito parcial para a ob- ten¸c~aodo t´ıtulode Doutor em Ci^encias. Area´ de Concentra¸c~ao:Astronomia Orientador: Prof. Dr. Alex Cavali´eriCarciofi Vers~aoCorrigida. O original encontra-se dis- pon´ıvel na Unidade. S~aoPaulo 2017 To the BeACoN1s! 1 \Be Aficionados Collaborative Network" (http://beacon.iag.usp.br/). And if you are interested in this thesis, you are one of us! Agradecimentos/Acknowledgements Muitas pessoas contribu´ırampara que este trabalho chegasse ao ponto em que chegou. Para mim, este trabalho representa apenas uma parte de uma conquista pessoal muito maior que eu tive desde que vim para S~aoPaulo, j´aquase em abril de 2011, e que envolve muitas coisas ´ıntimas `asquais eu me darei o direito de n~aoexpor aqui. Eu primeiramente agrade¸coimensamente ao Alex, meu orientador durante esses pouco mais de quatro anos em que trabalhamos juntos. Nesse per´ıodo, desenvolvemos uma rela¸c~aomuito mais que profissional. Desenvolvemos uma grande amizade que eu espero que dure para sempre! N~aodeve ter sido f´acilme orientar, j´adesde o come¸co,quando fui admitido como seu orientando de uma forma n~aousual. E, depois, teve o meu jeito peculiar de perder o foco e ir a fundo em algumas coisas e, muitas vezes, me dispersar por muito tempo por caminhos desnecess´arios!E muito obrigado pela paci^enciadurante as minhas fases de baixa produtividade que ocorreram principalmente em 2014 e 2015, e por ainda confiar em mim, apesar daqueles dias! Este trabalho cient´ıfico,brevemente apresentado nesta tese, ´ededicado principalmente a voc^e,e, em seguida, ao nosso grupo BeACoN, que espero poder se beneficiar com ele. Eu espero poder continuar colaborando profissionalmente com voc^epor mais bastante tempo! Eu agrade¸coem seguida `aprofessora S´ılviaRossi, que se mostrou verdadeiramente uma grande amiga durante o final do meu doutorado. Agrade¸copela grande empatia. Tamb´emvou guardar uma boa recorda¸c~aode voc^epara sempre! Muito obrigado, tamb´em,professor Eduardo Janot, por me entender quando eu disse que estava descontente com o nosso projeto, estava infeliz com ele, e decidi mudar de projeto e de orientador, l´apela segunda metade de 2012. Obrigado por aceitar a minha escolha e pelos calorosos e descontra´ıdoscumprimentos quando passamos a nos encontrar ocasionalmente pelos corredores do IAG desde ent~ao.Te desejo tudo de bom! Agrade¸coimensamente `aminha fam´ıliapor terem me dado tanto amor e compreens~ao, e por terem trabalhado muito para que eu conseguisse chegar at´eaqui. Agrade¸co`aminha m~aepor se dedicar de corpo e alma pela nossa forma¸c~ao- de meus irm~aosAlexandre e Daniel e minha. E grande foi a sua preocupa¸c~aocomigo aqui em S~aoPaulo! Obrigado por ter me ajudado com sua presen¸ca,conselhos e at´eo ombro amigo nessas ´ultimassemanas em que escrevi esta tese! Igualmente agrade¸coao meu pai, tamb´empela dedica¸c~aoao longo de nossas vidas, e por ser um grande exemplo para mim! Eu te admiro muito! Tanto que estou trilhando um caminho semelhante ao seu. Me recordei, agora, inclusive, de quando fal´avamos de ´atomose de estrelas quando eu era pequeno. Eu suspeito que voc^efoi essencial na minha paix~aopelo entendimento da natureza. E espero um dia me tornar um profissional t~aobom quanto voc^e! Obrigado Alexandre e Daniel, meus irm~aos,pela amizade e companheirismo ao cres- cermos juntos. E obrigado por estarem `adisposi¸c~aoem momentos que eu precisei, e pelas boas recep¸c~oesquando eu voltava para BH. Agrade¸cotamb´em`asminhas sobrinhas Raquel e Joana, simplesmente por serem uma alegria em nossas vidas! Voc^esrealmente coloriram a nossa fam´ılia! Desculpem-me por eu ficar longe de voc^esna maior parte do tempo! Obrigado, tia Neusa, por tamb´emestar sempre presente em nossas vidas, e sempre disposta a ajudar. Obrigado por considerar aos meus irm~aose a mim como se f^ossemos seus filhos e por nos acompanhar desde sempre! Obrigado, tamb´em,Bigode (o meu fii...). Agora, voc^etamb´eminventou de morar em S~aoPaulo! Obrigado por ser sempre um primo companheiro e amigo de todos n´os!Um amber!... Obrigado, tamb´em,Izabela, tia Marisa e tio Z´e,igualmente pela amizade e pelo companheirismo, e pelas risadas! E um obrigado `aPedrita, `aBabi e `aBianca, que j´ase foram, e `aSisi que est´abem velhinha! Agrade¸coimensamente aos meus amigos do grupo BeACoN e demais amigos do IAG e daqui de S~aoPaulo. Eu realmente descobri pessoas maravilhosas nesta cidade! Primei- ramente, muito obrigado, Daniel Moser, pela amizade e por me aconselhar em minhas dificuldades e incertezas pessoais (pessoalmente, ou por Skype, de Nice ou de Santiago). Obrigado a voc^ee aos seus pais pela recep¸c~aol´aem Santa Catarina. Obrigado tamb´em pela ajuda computacional com o seu pacote pyhdust (que agora ´ede todos n´os),por me introduzir ao emcee e por me auxiliar na administra¸c~aoda minha grade de modelos que foi gerada em semanas, pela m´aquina Alphacrucis, tamb´emcom a ajuda de v´arios BeACoNs. Muito obrigado, Bruno, pela imensa amizade desde que cheguei em SP, por se preocu- par comigo e por me aconselhar nos meus momentos de crise! Acho que voc^eteve muita sensibilidade de me perceber nesses momentos e me oferecer a sua amizade! Foi tamb´em muito bom aquele tempo em que moramos juntos no apartamento! E obrigado a voc^ee sua fam´ıliapela calorosa recep¸c~aoe passeios, me fazendo me sentir parte da fam´ılia! Agrade¸coimensamente tamb´em`aDaiane e ao Marcelo, pela descontra¸c~aoe pela maior intimidade que desenvolvemos especialmente nestes ´ultimosmeses de meu doutorado! Obrigado, tamb´em,Andr´e,pelo acolhimento nas recep¸c~oesem sua casa e em seu casa- mento e pelo voto de confian¸carecente de querer trabalhar junto comigo na continua¸c~ao deste trabalho! Agrade¸co,enfim, a todos os BeACoNs daqui do IAG, pela ajuda m´utua que damos uns aos outros e por sermos amigos, al´emde colaboradores. Muito obrigado, Rodrigo (Chuchu), Mohammad, Daniel Bednarski, Fellipy, Despo, Amanda, Artur, Lucas, Cyril e ao BeACoN a quem eu infelizmente tenha me esquecido de citar! I extend my thanks to some BeACoNs that live far away. Thanks, Thomas Rivinius, for providing me the data for the execution of this work and for the nice personal meetings we had here in S~aoPaulo, at IAG and at Alex' house, or in Canada. Thanks, Jon Bjorkman and Atsuo Okazaki, for the fruitful theoretical discussions on the physics involved in all what we were doing! And thanks, Robert Klement, for being a nice friend and collaborator from abroad! Unfortunately, I could not participate in that project Alex set for both of us, because I was too \lost" by that time! But we had nice times together here in S~ao Paulo! Obrigado, F´abioMendes, dono da ag^enciade viagens F´abioTur, pela amizade que desenvolvemos, e, especialmente, por me aturar durante os v´ariosmeses que convivemos juntos no apartamento! Obrigado por me ensinar muitas coisas da \vida pr´atica"e tamb´empelos conselhos. Agrade¸cotamb´em a alegria e a descontra¸c~aodos v´ariosamigos da F´abioTur: Thamirys, Luiz, Vanessa, o senhor Big, Daniel May, Arianna e demais malucos envolvidos! Obrigado, Mille, pela amizade distante e pela imensa intimidade que tivemos, l´apelo final de 2013! Foi uma uma experi^enciamuito bonita aquela, que eu vou guardar comigo para sempre! Te desejo muitas felicidades em seu casamento e em sua vida! Thanks, Neenie, for the distant friendship in the last year and for listening to me in my times of solitude! Muito obrigado, tamb´em,Erc´ıliaZilli e Alfredo Simonetti, profissionais que t^emtra- balhado para me ajudar em meus conflitos internos desde 2012! Muito obrigado, seu Geraldo, dona Mariazinha e Joana, por me acolherem em momentos de grande crise e por darem muito de si, gratuitamente, no intuito de me ajudar! Desculpem-me, hoje, por estar mais distante. Sinto que esse meu distanciamento foi necess´ariopara um apaziguamento interno nas minhas reflex˜oesexistenciais. Mas quero mandar um salve a todos os \jovens do Maria", incluindo o Jo~aoe o Francisco, filhos do meu orientador Alex! Saudades de todos! Tenho saudades, enfim, dos meus amigos da AECX, l´ade Belo Horizonte! Nos vimos t~aopoucas vezes nesses ´ultimos seis anos, e pe¸codesculpas pelo meu sumisso! Voc^esest~ao no meu cora¸c~aoe quero que nossa amizade dure para sempre! Finalmente, agrade¸co`aFAPESP (processo 2012/21518-5) e ao CNPq (processo 142411/2011- 6) pelo apoio financeiro. Esta tese/disserta¸c~aofoi escrita em LATEX com a classe IAGTESE, para teses e disserta¸c~oesdo IAG. \In principle, we can know all of mathematics. It is given to us in its entirety and does not change. ...That part of it of which we have a perfect view seems beautiful, suggesting harmony; that is that all the parts fit together although we see fragments of them only.
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