Observation techniques of the Baade-Wesselink method

The two observation techniques used for the interferometric version of the Baade-Wesselink method are high-resolution spectroscopy (left) and interferometry (right). The former provides the radial velocity curve over the pulsation cycle of the star. When integrated, this in turn provides the linear radius variation of the star (in metres). The interferometric observations document variation of the star's angular radius. The ratio of these two quantities gives the distance of the Cepheid.

Telif:

ESO

Görüntü Hakkında

Kimlik:eso0432a
Tür:Grafik
Yayın tarihi:29 Ekim 2004
Bağlantılı bültenler:eso0432
Boyut:800 x 592 px

Nesne Hakkında

Adı:Interferometry, Spectrograph, Stars
Tür:Unspecified : Star : Type : Variable
Kategori:Illustrations
Stars

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