escutando o universo
DESCRIPTION
Escutando o Universo. Por: Glauco D. P. Lopes. ONDAS ?. Espectro Sonoro (Acústico). Dó = 262 ciclos/seg ou Hertz(Hz). Ré = 294 Hz. Mi = 330 Hz. Fá = 349 Hz. Sol = 392 Hz. 20 Hz a 20 mil Hz. Lá = 440 Hz. (ouvido humano). Si = 494 Hz. ESPECTRO SONORO E ELETROMAGNÉTICO. - PowerPoint PPT PresentationTRANSCRIPT
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ONDAS ?
Espectro Sonoro (Acústico)
Dó = 262 ciclos/seg ou Hertz(Hz)
Ré = 294 Hz
Mi = 330 Hz
Fá = 349 Hz
Sol = 392 Hz
Lá = 440 Hz20 Hz a 20 mil Hz
Si = 494 Hz
(ouvido humano)
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ESPECTRO SONORO E ELETROMAGNÉTICO
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ESPECTRO ELETROMAGNÉTICO
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Karl Guthe Jansky (1905 - 1950);
INÍCIO DA OBSERVAÇÃO RADIO ASTRONOMIA
1932 - na empresa Bell Tellephone Laboratories em (New Jersey-EUA) Jansky detecta rádio sinal (ruído) extra-terrestre;
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Rádio antenas e receptores mais sensíveis (pós - II G. Mundial);
Unidade radiométrica: 1 Janky = 10^-26 Watt / metro^2 x Hz;
Jodrell Bank
Jodrell Bank, Inglaterra - 1945 - 68 m (diam.)
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Moscou (1963) - intensa emissão de um misterioso objeto:quasar (quasi estellar radio source) - CTA-102 c/ T=100 dias;
Novos objetos astronômicos nas décadas de 50 e 60;
Bell Tellephone Laboratories (1964) - Arno A. Penzias e Robert W. Wilson detectam radiação cósmica de fundo;
The Birds (banda de rock):
[“CTA-102, estamos aqui captando você./Os sinais nos dizem que você está aí./Podemos ouví-los em alto e bom som...”]
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Jodrell Bank (MK1), Inglaterra 1957 - 78 m (diam.)
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Green Bank(GBT), 1956 - West Virginia-EUA - 100 m (diam.)
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ONDA = ENERGIA RADIANTE
Sol Alfa-Centauri
150 milhões Km 4,3 anos-luz
Alfa-Centauri irradia 70 bilhões vezes menos
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O QUE FAZER ?
coletar mais energia irradiada
COMO ?
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JANELAS DE OBSERVAÇÃO
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O RADIO TELESCÓPIO
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RADIO ASTRONOMIA E COMPUTADORES
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ROI - RÁDIO OBSERVATÓRIO DO ITAPETINGA
Atibáia-SP, Brasil
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ROI - RÁDIO OBSERVATÓRIO DO ITAPETINGA
Desde 1971;
10 MHz a 10 GHz;
Antena: 13,7 metros;
Observação Sol, Planetas e Lua;
Meio Interestelar Regiões HII;Nebulosas planetárias,Remanescentes de supernovas;Poeira interestelar;
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ROI - RÁDIO OBSERVATÓRIO DO ITAPETINGA
Primeira emissão MASER de H2O em uma estrela simbiótica (R Aqr);
Transição MASER de SiO e a explosão do MASER de H2O em Órion;
Primeiro Mega MASER de H20;
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NUVENS MOLECULARES NA GALÁXIA
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MAPA GALÁCTICO
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ARECIBO OBSERVATORY
Arecibo, Puerto Rico
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ARECIBO OBSERVATORY
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2000DP107
ARECIBO OBSERVATORY
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VLA - VERY LARGE ARRAY
Socorro, New Mexico-EUA
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Nebulosa de Orion
VLA - VERY LARGE ARRAY
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Sol
VLA - VERY LARGE ARRAY
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Marte
VLA - VERY LARGE ARRAY
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Jupiter
VLA - VERY LARGE ARRAY
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Cassiopeia A
VLA - VERY LARGE ARRAY
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Centaurus-A (AGN’s)
VLA - VERY LARGE ARRAY
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VLBA - VERY LARGE BASELINE ARRAY
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VLBA - VERY LARGE BASELINE ARRAY
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VLBI - VERY LARGE BASELINE INTERFEROMETRY
quasar 3C 273
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”ENCONTRAMOS UMA ESTRANHA PEGADA NA ORLA DO DESCONHECIDO.DESENVOLVEMOS TEORIAS PROFUNDAS,UMA APÓS A OUTRA, PARA EXPLICAR SUA ORIGEM.POR FIM , CONSEGUIMOS RECONSTRUIR A CRIATURA QUE FEZ A PEGADA.E, ORA VEJAM! ELA É NOSSA PRÓPRIA PEGADA ".
(ARTHUR STANLEY EDDINGTON)
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REFERÊNCIAS:
Apostila* Formação de Estrelas - DAS/INPE - 2001
http://www.nrao.edu
http://www.aoc.nrao.edu/vla/html/VLAhome.shtml
http://www.aoc.nrao.edu/vlba/html/VLBA.html
* Jose Williams Vilas Boas (pesquisador titular da Divisão de Astrofísica do INPE - São José dos Campos/SP);
Agradecimento especial a Jose Williams Vilas Boas pelos esclarecimentos prestados sobre radio astronomia e às pesquisas realizadas no ROI - DAS/INPE;
www.das.inpe.br/~radio
Encarta Encyclopedia cd-rom 1996