The laser frequency comb in action

This picture illustrates part of a spectrum of a star obtained using the HARPS instrument on the ESO 3.6-metre telescope at the La Silla Observatory in Chile. The lines are the light from the star spread out in great detail into its component colours. The dark gaps in the lines are absorption features from different elements in the star. The regularly spaced bright spots just above the lines are the spectrum of the laser frequency comb that is used for comparison. The very stable nature and regular spacing of the frequency comb make it an ideal comparison, allowing the detection of minute shifts in the star’s spectrum that are induced by the motion of orbiting planets. Note that in this image, the colour range is for illustrative purposes only, as the real changes are much more subtle.

Telif:

ESO

Görüntü Hakkında

Kimlik:ann12037a
Tür:Gözlem
Yayın tarihi:30 Mayıs 2012 19:00
Bağlantılı duyurular:ann12037
Boyut:1061 x 674 px

Nesne Hakkında

Adı:HD75289, Spectrum
Tür:Milky Way : Star
Uzaklık:95 ışık yılı
Kategori:Stars

Görüntü Türleri

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Renkler & Filtreler

BantTeleskop
ESO 3.6-metre telescope
HARPS

 

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