Métodos Observacionais! (OVL725/825)!

Transcrição

Métodos Observacionais!
(OVL725/825)!
VI. "#$#%&'()*%!
Karín Menéndez-Delmestre!
Observatório do Valongo!
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1. To allow collection of photons over a larger area. Helps to detect
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fainter objects and to measure with greater accuracy
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2. To allow higher angular resolution. Helps to resolve and study
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spatial information
of extended objects.
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Collecting aperture
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F (focal length)
Focal plane
Optic axis
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Distância focal em
lentes e espelhos:
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a) lente biconvexa, b) espelho côncavo, c) lente bicôncava e d) espelho convexo.
T elescopes: A F ew definitions
Two main functions of telescopes
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1. To allow collection of photons over a larger area. Helps to detect
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fainter objects and to measure with greater accuracy
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2. To allow higher angular resolution. Helps to resolve and study
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spatial information
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Collecting aperture
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agem) e, quanto menor for a razão focal, maior o campo de visada. Como regra geral, os t
ncipais tipos de telescópios se encontram nas seguintes faixas:
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Refratores
– f/10 to f/20
Refletores – f/3 to f/8
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Catadióptricos – f/6 to f/11
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1.1.1 Distância Focal
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mo visto na figura abaixo, um objeto com um tamanho angular (!) no céu irá formar um
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HST 2.4m, F~56m (f/24)
WFI/ESO La Silla 2.2m, F~12 (f/8)
VLT/OmegaCAM 2.6m, F~14 (f/5.5)
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Métodos Observacionais! (OVL725/825)!

Transcrição

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astma behandling